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DAYLIGHT & SUNLIGHT REPORT

FIRST PACKAGE OF EARLS COURT RESERVED

MATTERS AND

WEST BROMPTON VILLAGE PLANNING APPLICATION

Prepared by: GIA Reference: 5066 Date: 4th December 2013

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DAYLIGHT AND SUNLIGHT IMPACT OF PROPOSED DEVELOPMENT ON RETAINED WEST KENSINGTON AND GIBBS GREEN ESTATE RESIDENTIAL BUILDINGS GIA have been instructed to provide specialist Daylight and Sunlight advice to EC Properties Limited as part of the design and development work associated with the first package of Reserved Matter Applications (RMAs) and a detailed planning application for the West Brompton Village in respect of outline planning permissions (ref. PP/11/01937 (RBKC) and 2011/02001/OUT (LBHF)) relating to the Earls Court Site. As part of the original Environmental Impact Assessment work in support of the LBHF Permission, GIA considered the interim potential effects of the Earls Court development proposals – over a phased indicative construction – upon the daylight and sunlight amenity enjoyed by the residential buildings on the West Kensington and Gibbs Green Housing Estates, the results of which were submitted in a report dated July 2012. Further to the Jul7 2012 report (forming part of the Environmental Statement (as amended)) and as part of the screening work for the RMAs and West Brompton Village planning application, the aim of this document is to ascertain if it is likely that there would be a significant Daylight or Sunlight impact caused to the existing residential West Kensington and Gibbs Green (Estate) buildings that are located within the curtilage of the wider Earls Court site. In order to assess the potential impact we have fully adhered to the methodology set out in the Building Research Establishment (BRE) 2001 Guidelines. In addition, one of the obligations under the Section 106 agreement relating to the Earls Court Development requires the submission of a Daylight and Sunlight screening assessment for approval that indicates whether or not a proposed RMA will necessitate a full technical Daylight and Sunlight assessment to accompany the application. This letter presents the necessary analysis in order to ascertain the potential for the proposed RMA to impact on Estate buildings. It fulfils the relevant Section 106 Agreement obligation. The proposed EC RMA (relating to Plots WVO3, WV04, WV06, BW05 and BW07) and West Brompton Village proposal is illustrated on GIA drawings 5066/610, 611 and 612 located in Appendix 2. The retained residential Estate properties most sensitive to the proposed massing and which have been assessed are highlighted green on the map below (proposed massing is highlighted in blue). The existing, undeveloped EC site is illustrated on GIA drawings 5066/607, 608 and 609 which can be found in Appendix 2.

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DAYLIGHT AND SUNLIGHT METHODOLOGY The basis of the technical analysis that has been undertaken is the methodology set out within the Building Research Establishment Guidelines entitled ‘Site Layout Planning for Daylight and Sunlight – A Guide to Good Practice (2011)’ by PJ Littlefair. The guidelines in question are precisely that; guidelines to inform site design which are not mandatory and are designed to be employed flexibly within the context of all the site constraints: “The advice given here is not mandatory and this document should not be seen as an instrument of Planning Policy; its aim is to help rather than constrain the designer. Although it gives numerical guidelines, these should be interpreted flexibly…..” (Page 1, Paragraph 1.6 – BRE Guidelines). The Guidelines themselves on Page 1 also indicate that they should be interpreted flexibly in City Centre and Urban Locations (such as Earls Court) and “if new developments are to match the height and proportions of existing buildings”. The Guidelines recognise that they should not form a mandatory set of criteria to which a development must adhere as that would be too restrictive for site development purposes; rather they provide guidance as to what would be a noticeable alteration in the neighbours’ amenity and what would be a satisfactory level of daylight and sunlight. However, the guidelines themselves are predicated upon a suburban development model and the values that they set out are based upon a suburban situation i.e. two 2 storey dwellings facing one another across a reasonable width road and the level of light that one would expect in that context. The reason this is important is that when one seeks to apply the guidelines in a more urban context, where neighbouring buildings are substantially taller, or the scale of massing is generally higher, there is a disjunction between crudely adhering to the recommended criteria and the flexibility that the guidelines themselves recommend. In this area, a degree of interpretation is necessary. The BRE guidelines provide two main methods of calculation for daylight. The first is known as the Vertical Sky Component (VSC) method which considers the potential for daylight by calculating the angle of vertical sky at the centre of each of the windows serving the residential buildings which look towards the site. This is a more simplistic approach and it could be considered as a “rule of thumb” to highlight whether there are any potential concerns to the amenity serving a particular property. An alteration in VSC daylight of less than 20% is considered by the BRE to be reasonable and likely to be unnoticeable by the occupant. The second method is the No Sky Line (NSL) or Daylight Distribution method. This simply assesses the change in position of the No Sky Line (NSL) between the existing and proposed situations. It does take into account the number and size of windows to a room, but still does not give any qualitative or quantitative assessment of the light in the room, only where sky can or cannot be seen. An alternation in NSL daylight of less than 20% is considered by the BRE to be reasonable and likely to be unnoticeable to the occupant. In relation to sunlight, the BRE criteria calculates the Annual Probable Sunlight Hours (APSH), which evaluates the amount of sun available in both the summer and winter for each given window which faces within 90° of due south. Windows which do not face within 90° of due south are not considered. Summer is considered to be the six months between March 21st and September 21st and winter the remaining months. The BRE prioritises sunlight to living rooms, but also indicates that kitchens and bedrooms should not be ignored. In consideration of this, GIA have undertaken a detailed Daylight (VSC and NSL) and Sunlight (APSH) technical assessment in accordance with the BRE Guidelines described above. This analysis has been undertaken against existing Estate buildings which, due to their proximity and orientation to the EC RMA proposals have windows and rooms that are sensitive to change, so as to determine whether or not there will be any material alteration in light. ASSUMPTIONS Where we have modelled buildings which are beyond the range of the measured survey information, we have used a base photogrammetric model and will have endeavoured to verify the base level via the use of GPS and altometer equipment.

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Where neighbouring elevations are not visible from a site inspection (but where it is likely that apertures may be present) we have inserted ‘test’ windows or estimated the position of apertures. The actual position may differ if closer access becomes possible and therefore technical analysis may differ from that confirmed herein. We have not sought or gained access to any of the Estate properties surrounding the EC RMA and West Brompton Village proposed sites. Nor have we been able to obtain room layout plans for all of the adjoining properties. Where we have not acquired floor-plans we have made reasonable assumptions as to the internal layouts of the rooms behind the fenestration in accordance with the BRE recommendations. Where it has been possible to acquire floor plans (15 Aisgill Avenue) the 3d model has been updated accordingly. Unless the building form dictates otherwise, we assume a standard 4.2m deep room (14ft) for residential properties and the 6m (20ft) deep from for commercial properties. Where it has been possible to source accurate floor plans from public records, the 3D context model and the rooms behind the fenestration have been updated accordingly. We have made best estimates as to the uses which are carried out legally within the adjoining properties in terms of commercial and residential units. We have estimated these from external observation and where possible from Local Authority records, and the uses are identified in the report below. All properties assessed for this report are residential in nature. Floor levels have been assumed for those adjoining Estate properties where drawing information has not been obtained. This dictates the level of the working plane which is relevant for the No Sky Line assessment. Where Estate properties have architectural features such as balconies, projections or recessed elevations which inhibit light penetration and distort their reliance upon light across the development site, we have considered their influence in accordance with the 2011 BRE guidance. Paragraph 2.2.11 of the BRE Guidelines (2011 – Site Layout Planning for Daylight and Sunlight – A guide to good practice) on page 8, states that such features can restrict the sky visibility in the existing scenario making the windows and rooms within, sensitive to any new alterations in massing, which should be considered when assessing the alteration in light. TECHNICAL DAYLIGHT/SUNLIGHT ASSESSMENTS Chapter 2.2 of the BRE 2011 Guidelines states that a full Daylight and Sunlight technical assessment is not always required. Paragraph 2.2.5 states that a new development is unlikely to cause a material impact upon existing neighbouring properties if it is of a sufficient height and distance from them. To ascertain if this is the case, the BRE recommend that a section line should be drawn on a plan perpendicular to a potentially affected neighbouring window and a measurement then taken of “the angle to the horizontal subtended by the new development at the level of the centre of the lowest window. If this angle is less than 25O for the whole of the development then it is unlikely to have a substantial effect on the defuse skylight enjoyed by the existing building” (Site Layout Planning for Daylight and Sunlight – A Guide to Good Practice, 2011). If this is found to be the case, then the proposed development is deemed to be of a sufficient height and distance from the existing structure and no further technical analysis is required. In consideration of the BRE recommendations above, in order to ascertain if a full technical assessment was required, four ground floor windows located within four residential properties (14c Aisgill Avenue; No. 22 Aisgill Avenue; 34 Aisgill Avenue; and 42 Aisgill Avenue) were selected due to their orientation and proximity to the proposed EC RMA and West Brompton Village site. A point at the centre of their lowest main window was taken and a 25O section line was then drawn towards the proposed development. Two of the section lines (from 14c Aisgill Avenue and 42 Aisgill Avenue) would comfortably clear the proposed EC RMA and West Brompton Village massing, suggesting that there would be no necessity for further technical Daylight or Sunlight analysis. A third section line from No. 22 Aisgill Avenue marginally clears BW05F, while the fourth section line cuts through BW05F, suggesting that a more detailed technical assessment should be undertaken. In light of the 25O section cuts, a decision was made to assess any sensitive Estate windows that due to orientation or proximity are potentially susceptible to alterations in daylight or sunlight beyond the BRE guidelines. These properties are highlighted in green on the site map above.

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In total, 290 windows, serving 189 rooms within 47 Estate properties were analysed. Our technical analysis indicates that there will be no material or perceptible Daylight (VSC / NSL) or Sunlight (APSH) losses to habitable rooms located in the following residential properties as a result of the proposed EC RMA and West Brompton Village development, as they will retain sufficient levels of VSC, NSL and APSH and thus remain fully in accordance with the 2011 Daylight/Sunlight BRE guidance:

Sharnbrook House 41 Aisgill Avenue 39 Aisgill Avenue 37 Aisgill Avenue 35 Aisgill Avenue 33 Aisgill Avenue 31 Aisgill Avenue 29 Aisgill Avenue 27 Aisgill Avenue 25 Aisgill Avenue 23 Aisgill Avenue 21 Aisgill Avenue 19 Aisgill Avenue 17 Aisgill Avenue 15 Aisgill Avenue 13 Aisgill Avenue 11 Aisgill Avenue 9 Aisgill Avenue 5 Aisgill Avenue

3 Aisgill Avenue 1 Aisgill Avenue 52 Aisgill Avenue 50 Aisgill Avenue 48 Aisgill Avenue 46 Aisgill Avenue 44 Aisgill Avenue 42 Aisgill Avenue 40 Aisgill Avenue 38 Aisgill Avenue 36 Aisgill Avenue 34 Aisgill Avenue 1 Stainier Close 2 Stainier Close 3 Stainier Close 4 Stainier Close 14d Aisgill Avenue 14c Aisgill Avenue

In consideration of the above, there will be a negligible loss of light to these 37 properties as a result of the proposed development. One property, 7 Aisgill Avenue will see a very small alteration in VSC to two windows (W52/603 and W53/03 – see window map 5066/WNECV-01 located in Appendix 4) which are influenced by its own existing architectural massing, in addition to the ESB Building located opposite, which blocks out a significant portion of the sky dome. The room does benefit from a third mitigating window that is BRE compliant and the room itself adheres to the NSL daylight criteria. As a result the loss to this room is deemed to be minor in nature. The nine remaining properties listed below located between 16 and 32 Aisgill Avenue will each experience a minor technical breech of VSC guidance to at least one window when assessed against the BRE 2011 criteria. However all of these properties will be fully in accordance with the NSL daylight and APSH sunlight criteria.

32 Aisgill Avenue 30 Aisgill Avenue 28 Aisgill Avenue 26 Aisgill Avenue 24 Aisgill Avenue 22 Aisgill Avenue 20 Aisgill Avenue 18 Aisgill Avenue 16 Aisgill Avenue

In total 18 windows, serving nine rooms, in the nine properties listed above, will experience alterations in light that are technically above that recommended by the BRE Daylight/Sunlight Guidance. All 18 windows are located at ground floor level in identical terraced houses which are orientated towards the proposed EC RMA and West Brompton Village massing. Window map drawing 5066-WNECV-01 located in Appendix 4 illustrates the location of these windows, and their consistent position between 16-32 Aisgill Avenue.

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The existing levels of sky visibility (VSC) that these impacted windows receive is between just 9.2% and 0.01%. This is substantially below that recommended by the BRE of 27% VSC, which makes these windows extremely vulnerable to even modest alterations in new massing. The poor levels of sky visibility are heavily influenced by the inherent architectural design of these properties. Each aperture is orientated into a rear site facing courtyard (see Window Map 5066/WNECV-02 located in Appendix 4; and Site Photo in Appendix 5) that is bordered by a 2.4m high boundary wall on two sides, with the building itself projecting out on the third. The boundary walls are roughly 4.2m from the windows at their furthest point. It is this architectural arrangement that severely restricts the sky visibility from these windows, making them exceptionally sensitive to even small changes in neighbouring massing. For example, window W8/6070 (located in 32 Aisgill Avenue – see window Map 5066-WNECV-01 located in Appendix 4 has an existing VSC of 7.64% and appears to serve a kitchen space. This is reduced to 4.53% as a result of the proposed massing. Technically this represents a 40.8% alteration, which using a strict interpretation of the BRE Guidelines could be classified as a major loss of sky visibility. However considering the existing VSC is nearly 20% below that recommended by the BRE, which is driven primarily on the basis of its own poor inherent architectural design and the very low existing level of VSC, we would classify this as a minor alteration in light. The BRE 2011 Guidelines acknowledge that in such circumstances windows are particularly sensitive. Paragraphs 2.1.12 and 2.2.11 state that if windows are sited close to corners, lower ground floor basements or next to existing obstructions, the levels of VSC can alter rapidly. It goes on to state that “even a modest obstruction opposite may result in a large relative impact on the VSC, and on the area receiving the direct skylight”. (BRE Guidelines, 2011 – Site Layout Planning for Daylight and Sunlight – A guide to good practice). In determining the alteration in light to these properties it is necessary to consider a number of factors. This includes: the location of the properties in a dense urban environment; their very poor existing levels of VSC; the fact they fully adhere to the NSL daylight guidance; the inherent flexibility of the BRE Guidelines; the fact the impact to these nine properties is limited to a small number of windows which are heavily influenced by existing architectural features that greatly restricts the view of the sky dome and the fact all remaining windows in each property fully comply with the VSC criteria. In light of these points, it is our opinion that the reduction in daylight caused by the proposed EC RMA and West Brompton Village scheme will be very minor in nature and in all probability imperceptible to the inhabitants. None of the sensitive windows in the 47 properties analysed are orientated within 90o of due south. As a consequence they are not relevant for Sunlight (APSH) analysis. In consideration of this, there will be no loss of Sunlight as a result of the proposed EC RMA scheme. SUMMARY As noted above, a number of technical Daylight and Sunlight verification assessments have been undertaken against the most sensitive retained residential Estate buildings. A total of 290 windows, serving 189 rooms within 47 properties were analysed. Of this number 270 (93%) windows were found to meet the BRE VSC guidance, while all 189 rooms (100%) would be NSL compliant. No sensitive windows are located within 90o of due south, and thus are not relevant for APSH sunlight analysis. Just 20 windows located in nine properties were found to be in breach of the BRE criteria, if a strict interpretation of the BRE were used. However further examination of these windows and the environment that surrounds them found that they were all very poorly lit in the existing scenario due to existing architectural features, making them exceptionally sensitive to any even modest alterations in new massing. The alterations that will occur are of such a minor quantum, it is highly probable that they will be imperceptible to the inhabitants. As a result, the proposed EC RMA and West Brompton Village proposal will not cause a material alteration in Daylight or Sunlight to the existing Estate buildings that sit within the curtilage of the proposed Earls Court development site. Hence, the proposed EC RMA and West Brompton Village proposal do not give rise to any further or additional likely significant interim impacts to the existing Estate buildings and the conclusions of the ES (as amended) remain valid. In relation to the Section 106 obligation, we can similarly conclude that the EC RMA need not be accompanied by a detailed daylight and sunlight assessment.

APPENDIX 1 PRINCIPLES OF DAYLIGHT AND SUNLIGHT

PRINCIPLES OF DAYLIGHT AND SUNLIGHT

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BACKGROUND

The quality of amenity for buildings and open spaces is increasingly becoming the subject of concern and

attention for many interested parties.

Historically the Department of Environment provided guidance of these issues and, in this country, this role has

now been taken on by the Building Research Establishment (BRE), the British Standards Institution (BSI) and the

Chartered Institute of Building Services Engineers (CIBSE). Fortunately they have collaborated in many areas to

provide as much unified advice as possible in these areas.

Further emphasis has been placed on these issues through the European Directive that require Environmental

Impact Assessments (EIA’s) for large projects. Parts of these assessments include the consideration of the micro-

climate around and within a proposal. The EIA requires a developer to advise upon, amongst other matters, the

quality of and impact to daylight, sunlight, overshadowing, solar glare and light pollution.

It is also clear, particularly through either adopted or emerging Unitary Development Plans (UDP’s), that local

Authorities take this matter far more seriously than they previously did. There are many instances of planning

applications being refused due to impact on daylight and sunlight to neighbouring properties and

proportionately more of these refusals are appealed by applicants.

Where developers are seeking to maximise their development value, it is often in the area of daylight and

sunlight issues that they may seek to ‘push the boundaries’. Local Authorities vary in their attitude of how

flexible they can be with worsening the impact on the amenity enjoyed by neighbouring owners. In city

centres, where there is high density, it can be the subject of hot debate as to whether further loss of amenity is

material or not. There are many factors that need to be taken into account and therefore each case has to be

considered on its own merits. Clearly, though, there are governing principles which direct and inform on the

approach that is taken.

These principles are effectively embodied within the UDP’s and the guidance they expressly rely upon. For

example, in central London, practically all of the Local Authorities expressly state they will not permit or

encourage developments which create a material impact to neighbouring buildings or amenity areas. Often the

basis on what is constituted as ‘material’ will be derived specifically from the BRE Guidelines. The guidelines

were produced in 1991, as a direct commission from the Department of the Environment, and entitled ‘Site

Layout Planning for Daylight and Sunlight – A Guide to Good Practice’. In October 2011, the BRE Guidelines

were updated and the revised edition states the 2011 BRE “… supersedes the 1991 edition which is now

withdrawn”.


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These guidelines are normally recognised as being the main source for which amenity issues can be

considered. The document is used by the majority of local Authorities (adopted within the policy) and

consequently they are referred to extensively by designers, consultants and planners. Whilst they are expressly

not mandatory and state that they should not be used as an instrument of planning policy, they are heavily

relied upon as they advise on the approach, methodology evaluation of impact in daylight and sunlight matters

– a key consideration through the planning policy.

THE BRE GUIDELINES

The BRE give criteria and methods for calculating daylight, and sunlight as well as overshadowing and through

each approach define what they consider as a material impact. As these different methods of calculation vary

in their depth of analysis, it is often arguable as to whether the BRE definition of ‘material’ is applicable in all

locations and furthermore if it holds under the different methods of calculation.

As the majority of the controversial daylight and sunlight issues occur within city centres these explanatory

notes focus on the relevant criteria and parts of the Handbook which are applicable in such locations.

In the Introduction of ‘Site Layout Planning for Daylight and Sunlight (2011)’, Section 1.6 (page 1), states that:-

"The guide is intended for building designers and their clients, consultants and planning officials. The advice

given here is not mandatory and this document should not be seen as an instrument of planning policy. Its

aim is to help rather than constrain the designer. Although it gives numerical guidelines, these should be

interpreted flexibly because natural lighting is only one of many factors in site layout design (see Section 5).

In special circumstances the developer or Planning Authority may wish to use different target values. For

example, in an historic city centre a higher degree of obstruction may be unavoidable if new developments

are to match the height and proportions of existing buildings".

Again, the third paragraph of Chapter 2.2 (page 7) of the document states:-

‘Note that numerical values given here are purely advisory. Different criteria may be used, based on the

requirements for daylighting in an area viewed against other site layout constraints’.

The reason for including these statements in the Report is to appreciate that when quoting the criteria

suggested by the BRE, they should not necessarily be considered as appropriate. However, rather than suggest

alternative values, consultants in this field often remind local Authorities that this approach is supportable and

thus flexibility applied.


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MEASUREMENT AND CRITERIA FOR DAYLIGHT & SUNLIGHT

The BRE handbook provides two main methods of measurement for calculating daylight which we use for the

assessment in our Reports. In addition, in conjunction with the BSI and CIBSE it provides a further method in

Appendix C of the Handbook. In relation to sunlight only one method is offered for calculating sunlight

availability for buildings. There is an overshadowing test offered in connection with open spaces.

DAYLIGHT

In the first instance, if a proposed development falls beneath a 25o angle taken from a point two metres above

ground level, then the BRE say that no further analysis is required as there will be adequate skylight (i.e. sky

visibility) availability.

The two methods for calculating daylight to existing surrounding residential properties are as follows:

Vertical Sky Component (VSC) and

No Sky Contours (NSC)

The main method for calculating daylight to proposed residential properties is:

Average Daylight Factor (ADF)

Each is briefly described below.

(a) Vertical Sky Component

Methodology

This is defined in the Handbook as:-

“Ratio of that part of illuminance, at a point on a given vertical plane that is received directly from a CIE

standard overcast sky, to illuminate on a horizontal plane due to an unobstructed hemisphere of this sky.”

"Note that numerical values given here are purely advisory. Different criteria may be used, based on the

requirements for daylighting in an area viewed against other site layout constraints".


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The ratio referred to in the above definition is the percentage of the total unobstructed view that is available,

once obstructions, in the form of buildings (trees are excluded) are placed in front of the point of view. The

view is always taken from the centre of the outward face of a window.

This statement means, in practice that if one had a totally unobstructed view of the sky, looking in a single

direction, then just under 40% of the complete hemisphere would be visible.

The measurement of this vertical sky component is undertaken using two indicators, namely a skylight indicator

and a transparent direction finder. Alternatively a further method of measuring the vertical sky component,

which is easier to understand both in concept and analysis, is often more precise and can deal with more

complex instructions, is that of the Waldram diagram.

The point of reference is the same as for the skylight indicator. Effectively a snap shot is taken from that point of

the sky in front of the window, together with all the relevant obstructions to it, i.e. the buildings.

An unobstructed sky from that point of reference would give a vertical sky component of 39.6%, corresponding

to 50% of the hemisphere, and therefore the purpose of the diagram is to discover how much sky remains once

obstructions exist in front of that point.

The diagram comes on an A4 sheet (landscape) and this sheet represents the unobstructed sky, which in one

direction equates to a vertical sky component of 39.6%. The obstructions in front of a point of reference are

then plotted onto the diagram and the resultant area remaining is proportional to the vertical sky component

from that point.

Criteria

The BRE Handbook provides criteria for:

(a) New Development

(b) Existing Buildings

A summary of the criteria for each of these elements is given and these are repeated below:-

New Development

Summary

In general, a building will retain the potential for good interior diffuse daylighting provided that on all its main faces:-


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(a) no obstruction, measured in a vertical section perpendicular

to the main face, from a point 2m above ground level, subtends

an angle of more than 25 degrees to the horizontal;

(b) If (a) is not satisfied, then all points on the main face on a line

2m above ground level are within 4m (measured sideways) of a

point which has a vertical sky component of 27% or more.

Existing Buildings

Summary

If any part of a new building or extension measured in a vertical section perpendicular to a main window wall of an

existing building, from the centre of the lowest window, subtends an angle of more than 25 degree to the horizontal,

then the diffuse daylighting of the existing building may be adversely affected. This will be the case if either:

(a) the vertical sky component measured at the centre of an existing

main window is less than 27%, and less than 0.8 times its former value;

or

(b) the area of the working plane in a room which can receive direct

skylight is reduced to less than 0.8 times its former value.

The VSC calculation has, like the other two methods, both advantages and disadvantages. In fact they are tied

together. It is a quick simple test which looks to give an early indication of the potential for light. However, it

does not, in any fashion, indicate the quality of actual light within a space. It does not take into account the

window size, the room size or room use. It helps by indicating that if there is an appreciable amount of sky

visible from a given point there will be a reasonable potential for daylighting.

(b) No Sky Contours

This is the part (b) of the alternative method of analysis which is given under the Vertical Sky

Component heading in this Appendix. It is similar to the VSC approach in that a reduction of 0.8 times

in the area of sky visibility at the working plane may be deemed to adversely affect daylight. It is

however, very dependent upon knowing the actual room layouts or having a reasonable

understanding of the likely layouts. The contours are also known as daylight distribution contours.

They assist in helping to understand the way the daylight is distributed within a room and the

comparisons of existing and limitations of proposed circumstances within neighbouring properties.

Like the VSC method, it relates to the amount of visible sky but does not consider the room use in its


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criteria, it is simply a test to assess the change in position of the No Sky Line, between the existing and

proposed situation. It does take into account the number and size of windows to a room, but does

not give any quantative or qualitative assessment of the light in the rooms, only where sky can or

cannot be seen.

(c) Average Daylight Factor

This is defined in Appendix H of the BRE Document as:

“Ratio of total daylight flux incident on the working plane, expressed as a percentage of the outdoor

illuminance on a horizontal plane due to an unobstructed CIE Standard Overcast Sky.”

This factor considers interior daylighting to a room and therefore is a more accurate indication of

available light in a given room, if details of the room size and use are available.

Criteria

The British Standard, BS8206 Part II gives the following recommendations for the average daylight factor (ADF)

in dwellings.

The BRE Handbook provides the formula for calculating the average daylight factor. If the necessary

information can be obtained to use the formula then this criteria would be more useful.

Room Percentage

Kitchen 2%

Living Rooms 1.5%

Bedrooms 1%

It is sometimes questioned whether the use of the ADF is valid when assessing the impact on neighbouring

buildings. Firstly, it is often the case that room layouts and uses may not have been established with certainty.

Additionally this method is not cited in the main body of text in the BRE Guidelines but only in Appendix C of

that document. It is however, the principal method used by both the British Standard and CIBSE in their

detailed daylight publications with which the BRE guide recommends that it should be read.

The counter-argument to this view is that whilst room uses and layouts may be not definitely established,

reasonable assumptions can easily be made to give sufficient understanding of the likely quality of light.

Building types and layouts for certain buildings, particularly residential, are often similar. In these circumstances

reasonable conclusions can be drawn as to whether a particular room will have sufficient light against the

British Standards. In addition, the final result is less sensitive to changes in the room layout than the No Sky


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Contour method as it is an average and this element represents only one of the input factors. It is in cases

where rooms sizes have been assumed a more reliable indicator than the No Sky Line method.

Clearly if a room which is being designed for a new development is deemed to have sufficient light against

the British Standards, then it should equally follow for a room assessed in a neighbouring existing building.

The average daylight factor considers the light within the room behind the fenestration which serves it. The

latter is therefore likely to be more accurate because it takes into account the following:-

a) All the windows serving the room in question.

b) The room use.

c) The size and layout of the room.

d) The finishes of the room surfaces.

SUMMARY

The VSC (which forms part of the ADF formula) is helpful as an initial first guide, especially where access to the

rooms in question is not available. Where the room layouts and uses are established or can be reasonably

estimated we consider it appropriate to analyse the average daylight factor as well as the vertical sky

component.

SUNLIGHT

(a) Annual Probable Sunlight Hours (APSH) method

Sunlight is measured in the Handbook in a similar manner to the first method given for measuring the

VSC. A separate indicator is used which contains 100 spots, each representing 1% of annual probable

sunlight hours.

The BRE calculated that where no obstructions exist, the total annual probable sunlight hours would

amount to 1486. Therefore, each dot on the indicator equates to 14.86 hours of the total annual

probable sunlight. Again, to use this indicator the obstructions need to be scaled down and overlaid

onto the sunlight indicator.


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Those spots which remain uncovered by the scaled obstructions are counted and this gives the

percentage of total annual probable sunlight hours for that particular reference point. Again, like the

VSC, the reference point is taken to be the centre of the window.

Criteria

Again, the BRE Handbook gives criteria for:

(a) New Development

(b) Existing Buildings

A summary is given in the Handbook on page 16 and this is as follows:-

New Development

Summary

‘In general, a dwelling or non-domestic building which has a particular requirement for sunlight, will appear

reasonably sunlit provided’;-

(a) at least one main window wall faces within 90 degrees of due south;

and

(b) the centre of at least one window to a main living room can receive 25% of annual probable

sunlight hours, including at least 5% of annual probable sunlight hours in the winter months

between 21 September and 21 March.

Existing Buildings

Summary (page 17)

‘If a living room of an existing dwelling has a main window facing within 90° of due south, and any part of a

new development subtends an angle of more than 25° to the horizontal measured from the centre of the

window in a vertical section perpendicular to the window, then the sunlighting of the existing dwelling may

be adversely affected. This will be the case if a point at the centre of the window;

receives less than 25% of annual probable sunlight hours , or less than 5% of annual probable sunlight

hours between 21 September and 21 March;


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receives less than 0.8 times its former sunlight hours during either period; and

has a reduction in sunlight received over the whole year greater than 4% annual probable sunlight

hours.

It will be noted that the BRE clearly separates summer from winter and indicates that a 20% reduction for either

may be material. The Handbook also states that- “To assess loss of sunlight to an existing building, it is suggested

that all main living rooms of dwellings and conservatories, should be checked if they have a window facing within 90o

of due south. Kitchens and bedrooms are less important, although care should be taken not to block too much sun... A

point at the centre of each window on the outside face of the window wall may be taken”.

(b) Area of Permanent Shadow- Sun Hours on Ground

The 2011 BRE Handbook, ‘Site Layout Planning for Daylight and Sunlight’ (Second edition) also

provides criteria for open spaces where sunlight will be required, including; gardens, parks, children’s

playgrounds, public squares etc.

The BRE Guidance acknowledges that sunlight in the space between buildings has an important effect

on the overall appearance and ambience of a development. The worst situation is to have significant

areas on which the sun only shines for a limited part of the year.

In summary the BRE document states the following:-

“It is suggested that, for it to appear adequately sunlit throughout the year, at least half of a garden or

amenity area should receive at least two hours of sunlight on 21 March. If, as a result of new development an

existing garden or amenity area does not meet the above, and the area which can receive some two hours of

sun on 21 March is less than 0.8 times its former value, then the loss of sunlight is likely to be noticeable”.

In relation to general overshadowing we often provide, where appropriate, an hourly record for

existing and proposed situations, the effect of overshadowing on December 21st, March 21st and June

21st.

For open spaces the sun hours on ground criteria is naturally adopted but this offers limited

understanding of how a space will feel or appear generally.

CITY CENTRES

The introduction of the BRE document gives the example of 'historic city centres' being a case where there is the

need for flexibility and altering the target values for criteria when appropriate, to reflect other site and layout

constraints.


10

To explain why it is appropriate to alter these values, one needs to go further into the BRE Handbook to

examine how the criteria for the vertical sky component criteria was determined and the reason therefore for

varying the criteria in City Centres.

Appendix F of the document is dedicated to the use of alternative values and, it also demonstrates the manner

in which the criteria for skylight was determined for the Summary given above, i.e. the need for 27% vertical sky

component for adequate daylighting.

This figure of 27% was achieved in the following manner:

A theoretical road was created with two storey terraced houses upon either side, approximately twelve metres

apart. The houses have windows at ground and first floor level, and a pitched roof with a central ridge.

Thereafter, a reference point was taken at the centre of a ground floor window of one of the properties and a

line was drawn from this point to the central ridge of the property on the other side of the road. The angle of

this line equated to 25 degrees (the 25 degrees referred to in the summaries given with reference to the criteria

for skylight).

This 25 degrees line obstructs 13% of the totally unobstructed sky available, leaving a resultant figure of 27%

which is deemed to give adequate daylighting. This figure of 27% is the recommended criteria referred to

earlier in this report. It will be readily appreciated that in a City Centre, this kind of urban form is unlikely and is

impractical. It would therefore be inappropriate to consider values for two storey terraced housing in a City

Centre.

It is therefore sometimes necessary to apply different target criteria or at least acknowledge that the

recommendations in the BRE cannot be achieved.

In addition, it is often the case that residential buildings within city centres are served by balconies. Balconies

restrict lighting levels even more and thus if they were to be rigidly taken into account, a neighbouring

proposal would be artificially and inappropriately constrained. This view is supported by the BRE and is equally

another reason for flexible and sensible interpretation of the guidelines.

APPENDIX 2 EXISTING AND PROPOSED DRAWINGS

EXISTING

PLOWMAN CRAVEN

IR01-5066 Area 5 Survey


IR15-5066 Area 6 Additional Survey






IR05-5066 Area 2/3 Survey





Survey 06/10/11 Site Topo

EARLS COURT & OLIMPIA Survey 06/10/11

GIA

IR02-5066 Site Photography

IR17-5066 Vertex Modelling



FARRELLS

IR97-5066 Proposed Scheme

ECM14_current massing to issue_121113.3dm

Proposed Scheme 14/10/13

1310-3d-BW07F.dwg

1310-3D-WV05A.dwg

Sources of Information

EARLS COURT

OCT 13

CJ-

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.

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SITE PLAN

SHOWING EXISTING BUILDINGS

ECV ESTATE WINDOWS

1:2500

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1

PLOWMAN CRAVEN
















GIA





FARRELLS




1310-3d-BW07F.dwg

1310-3D-WV05A.dwg


EARLS COURT

OCT 13

CJ -

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.

Rev DescriptionDateInitials

@A3

Initial Issue

3D VIEW

EXISTING BUILDINGS

ECV ESTATE WINDOWS

NTS

5066/608

PLOWMAN CRAVEN
















GIA





FARRELLS




1310-3d-BW07F.dwg

1310-3D-WV05A.dwg


EARLS COURT

OCT 13

CJ-

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.


@A3

Initial Issue

3D VIEW

EXISTING BUILDINGS

ECV ESTATE WINDOWS

NTS

5066/609

PROPOSED

PLOWMAN CRAVEN
















GIA





FARRELLS




1310-3d-BW07F.dwg

1310-3D-WV05A.dwg


EARLS COURT

OCT 13

CJ-

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.


@A3

A Initial Issue

SITE PLAN

PROPOSED SCHEME

ECV ESTATE WINDOWS

1:2500

5066/610

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1

PLOWMAN CRAVEN
















GIA





FARRELLS




1310-3d-BW07F.dwg

1310-3D-WV05A.dwg


EARLS COURT

OCT 13

CJ -

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.

Rev DescriptionDateInitials

@A3

Initial Issue

3D VIEW

PROPOSED SCHEME

ECV ESTATE WINDOWS

NTS

5066/611

PLOWMAN CRAVEN
















GIA





FARRELLS




1310-3d-BW07F.dwg

1310-3D-WV05A.dwg


EARLS COURT

OCT 13

CJ-

131 A

The Whitehouse

Belvedere Road

London SE1 8GA

t 020 7202 1400

f 020 7202 1401

[email protected]

www.gia.uk.com

Project

Title

Scale

Drawn

Drawing No.

Date

Revision


Notes

Checked

Rel No.


@A3

Initial Issue

3D VIEW

PROPOSED SCHEME

ECV ESTATE WINDOWS

NTS

5066/612

APPENDIX 3 DAYLIGHT TABLES OF RESULTS

VERTICAL SKY COMPONENT (VSC)

OCT 2013Project No: 5066 (rel131_wbromptonblocks)Existing v ProposedPhase 1 15/10/13

Earls CourtScheme 15/10/13 - Phase 1 Site

DAYLIGHT ANALYSIS

AECVarea6east_Proposed(Notes) 06/11/2013 1/7

Room Window Room Use Existing Proposed Loss %

Sharnbrook House

R1/6020 W1/6020 27.64 27.62 0.02 0.07

R2/6020 W2/6020 26.88 26.88 0.00 0.00

R3/6020 W3/6020 26.36 26.36 0.00 0.00

R4/6020 WA7/6020 9.94 9.94 0.00 0.00

R7/6020 W4/6020 22.15 22.15 0.00 0.00

R8/6020 W5/6020 21.05 21.06 -0.01 -0.05

R9/6020 W6/6020 19.89 19.77 0.12 0.60

R1/6021 W1/6021 29.68 29.60 0.08 0.27

R2/6021 W2/6021 29.13 29.06 0.07 0.24

R3/6021 W3/6021 28.75 28.69 0.06 0.21

R4/6021 W4/6021 17.90 17.86 0.04 0.22

R5/6021 W5/6021 25.36 25.35 0.01 0.04

R6/6021 W6/6021 23.09 23.09 0.00 0.00

R7/6021 W7/6021 25.39 25.39 0.00 0.00

R8/6021 W8/6021 24.36 24.37 -0.01 -0.04

R9/6021 W9/6021 23.04 22.92 0.12 0.52

R1/6022 W1/6022 31.28 31.04 0.24 0.77

R2/6022 W2/6022 30.87 30.67 0.20 0.65

R3/6022 W3/6022 30.62 30.44 0.18 0.59

R4/6022 W4/6022 19.44 19.26 0.18 0.93

R5/6022 W5/6022 27.29 27.16 0.13 0.48

R6/6022 W6/6022 25.00 24.85 0.15 0.60

R7/6022 W7/6022 28.24 28.13 0.11 0.39

R8/6022 W8/6022 27.38 27.26 0.12 0.44

R9/6022 W9/6022 25.99 25.77 0.22 0.85

41 Aisgill Avenue

R1/6030 W1/6030 13.22 12.89 0.33 2.50R1/6030 W2/6030 11.32 11.32 0.00 0.00R1/6030 W3/6030 12.16 12.14 0.02 0.16

R1/6031 W1/6031 14.26 14.14 0.12 0.84

R1/6032 W1/6032 16.68 16.55 0.13 0.78

39 Aisgill Avenue

R2/6030 W4/6030 13.89 13.38 0.51 3.67R2/6030 W5/6030 14.59 14.08 0.51 3.50R2/6030 W6/6030 12.64 12.64 0.00 0.00

R2/6031 W2/6031 14.81 14.60 0.21 1.42

R2/6032 W2/6032 17.00 16.79 0.21 1.24

37 Aisgill Avenue

R3/6030 W7/6030 13.99 13.53 0.46 3.29R3/6030 W8/6030 11.70 11.70 0.00 0.00R3/6030 W9/6030 12.35 12.35 0.00 0.00

R3/6031 W3/6031 14.80 14.59 0.21 1.42

R3/6032 W3/6032 16.87 16.66 0.21 1.24

35 Aisgill Avenue

R4/6030 W10/6030 13.95 13.34 0.61 4.37

Vertical Sky Component



DAYLIGHT ANALYSIS




R4/6030 W11/6030 14.62 14.01 0.61 4.17R4/6030 W12/6030 12.57 12.57 0.00 0.00

R4/6031 W4/6031 14.75 14.47 0.28 1.90

R4/6032 W4/6032 16.69 16.42 0.27 1.62

33 Aisgill Avenue

R5/6030 W13/6030 14.30 13.65 0.65 4.55R5/6030 W14/6030 11.72 11.72 0.00 0.00R5/6030 W15/6030 12.38 12.38 0.00 0.00

R5/6031 W5/6031 14.93 14.48 0.45 3.01

R5/6032 W5/6032 16.82 16.37 0.45 2.68

31 Aisgill Avenue

R6/6030 W16/6030 15.09 14.18 0.91 6.03R6/6030 W17/6030 15.80 14.89 0.91 5.76R6/6030 W18/6030 15.94 14.97 0.97 6.09

R6/6031 W6/6031 16.95 15.99 0.96 5.66

R6/6032 W6/6032 17.59 16.65 0.94 5.34

29 Aisgill Avenue

R7/6030 W19/6030 16.13 15.09 1.04 6.45R7/6030 W20/6030 15.47 14.45 1.02 6.59R7/6030 W21/6030 16.07 15.06 1.01 6.29

R7/6031 W7/6031 17.26 16.24 1.02 5.91

R7/6032 W7/6032 17.80 16.80 1.00 5.62

27 Aisgill Avenue

R8/6030 W22/6030 12.29 11.16 1.13 9.19R8/6030 W23/6030 12.66 11.54 1.12 8.85R8/6030 W24/6030 14.89 13.79 1.10 7.39

R8/6031 W8/6031 15.31 14.24 1.07 6.99

R8/6032 W8/6032 16.72 15.68 1.04 6.22

25 Aisgill Avenue

R9/6030 W25/6030 14.36 13.26 1.10 7.66R9/6030 W26/6030 15.23 14.09 1.14 7.49R9/6030 W27/6030 15.70 14.61 1.09 6.94

R9/6031 W9/6031 15.64 14.55 1.09 6.97

R9/6032 W9/6032 17.12 16.06 1.06 6.19

23 Aisgill Avenue

R10/6030 W28/6030 12.68 11.45 1.23 9.70R10/6030 W29/6030 13.00 11.84 1.16 8.92R10/6030 W30/6030 15.42 14.20 1.22 7.91

R10/6031 W10/6031 15.89 14.69 1.20 7.55

R10/6032 W10/6032 17.08 15.91 1.17 6.85

21 Aisgill Avenue

R11/6030 W31/6030 14.67 13.36 1.31 8.93R11/6030 W32/6030 15.72 14.39 1.33 8.46R11/6030 W33/6030 16.11 14.83 1.28 7.95

R11/6031 W11/6031 16.35 15.04 1.31 8.01

R11/6032 W11/6032 17.65 16.36 1.29 7.31

19 Aisgill Avenue

R12/6030 W34/6030 13.24 11.76 1.48 11.18R12/6030 W35/6030 13.59 12.16 1.43 10.52R12/6030 W36/6030 16.45 14.91 1.54 9.36

R12/6031 W12/6031 16.79 15.33 1.46 8.70



DAYLIGHT ANALYSIS




R12/6032 W12/6032 18.18 16.75 1.43 7.87

17 Aisgill Avenue

R13/6030 W37/6030 15.36 13.60 1.76 11.46R13/6030 W38/6030 15.82 14.18 1.64 10.37R13/6030 W39/6030 15.79 14.20 1.59 10.07

R13/6031 W13/6031 16.91 15.21 1.70 10.05

R13/6032 W13/6032 18.22 16.55 1.67 9.17

15 Aisgill Avenue

R14/6030 W40/6030 11.33 9.58 1.75 15.45R14/6030 W41/6030 11.24 9.52 1.72 15.30R14/6030 W42/6030 16.99 14.91 2.08 12.24

R14/6031 W14/6031 17.13 15.23 1.90 11.09

R14/6032 W14/6032 18.35 16.48 1.87 10.19

13 Aisgill Avenue

R15/6030 W43/6030 15.90 13.70 2.20 13.84R15/6030 W44/6030 16.64 14.51 2.13 12.80R15/6030 W45/6030 16.54 14.44 2.10 12.70

R15/6031 W15/6031 17.52 15.27 2.25 12.84

R15/6032 W15/6032 18.82 16.61 2.21 11.74

11 Aisgill Avenue

R16/6030 W46/6030 12.10 9.86 2.24 18.51R16/6030 W47/6030 11.98 9.75 2.23 18.61R16/6030 W48/6030 17.69 15.13 2.56 14.47

R16/6031 W16/6031 17.83 15.37 2.46 13.80

R16/6032 W16/6032 19.17 16.75 2.42 12.62

9 Aisgill Avenue

R17/6030 W49/6030 19.50 16.74 2.76 14.15R17/6030 W50/6030 18.11 15.38 2.73 15.07R17/6030 W51/6030 18.08 15.30 2.78 15.38

R17/6031 W17/6031 20.30 17.52 2.78 13.69

R17/6032 W17/6032 20.64 17.89 2.75 13.32

7 Aisgill Avenue

R18/6030 W52/6030 12.86 10.08 2.78 21.62R18/6030 W53/6030 12.79 9.98 2.81 21.97R18/6030 W54/6030 16.00 12.98 3.02 18.88

R18/6031 W18/6031 16.10 13.00 3.10 19.25

R18/6032 W18/6032 19.00 15.95 3.05 16.05

5 Aisgill Avenue

R19/6030 W55/6030 18.45 15.49 2.96 16.04R19/6030 W56/6030 13.75 12.05 1.70 12.36R19/6030 W57/6030 13.67 11.98 1.69 12.36

R19/6031 W19/6031 18.90 16.00 2.90 15.34

R19/6032 W19/6032 20.55 17.69 2.86 13.92

3 Aisgill Avenue

R20/6030 W58/6030 18.68 15.74 2.94 15.74R20/6030 W59/6030 18.87 15.80 3.07 16.27R20/6030 W60/6030 20.33 17.52 2.81 13.82

R20/6031 W20/6031 21.95 18.24 3.71 16.90

R20/6032 W20/6032 22.31 18.63 3.68 16.49

1 Aisgill Avenue

R21/6030 W61/6030 18.63 16.99 1.64 8.80



DAYLIGHT ANALYSIS




R21/6030 W62/6030 15.09 14.08 1.01 6.69R21/6030 W63/6030 16.18 14.74 1.44 8.90

R21/6031 W21/6031 22.42 18.41 4.01 17.89

R21/6032 W21/6032 22.97 18.90 4.07 17.72

52 Aisgill Avenue

R1/6050 W1/6050 Entrance Non-Habitable 0.00 0.00 0.00 0.00R1/6050 W2/6050 See window map 1.76 0.43 1.33 75.57R1/6050 W3/6050 5066/WNECV-02 4.93 2.71 2.22 45.03

in Appendix 4R1/6051 W1/6051 29.23 25.33 3.90 13.34

R1/6052 W1/6052 29.88 26.08 3.80 12.72

50 Aisgill Avenue

R2/6050 W4/6050 Entrance Non-Habitable 1.42 0.47 0.95 66.90R2/6050 W5/6050 See window map 0.00 0.00 0.00 0.00

5066/WNECV-02in Appendix 4

R2/6051 W2/6051 25.19 21.49 3.70 14.69

R2/6052 W2/6052 27.72 24.11 3.61 13.02

48 Aisgill Avenue



R3/6051 W3/6051 29.88 25.67 4.21 14.09

R3/6052 W3/6052 30.04 25.92 4.12 13.72

46 Aisgill Avenue



R4/6051 W4/6051 30.19 25.89 4.30 14.24

R4/6052 W4/6052 30.43 26.22 4.21 13.84

44 Aisgill Avenue


in Appendix 4R5/6051 W5/6051 25.71 21.34 4.37 17.00

R5/6052 W5/6052 28.34 24.05 4.29 15.14

42 Aisgill Avenue


in Appendix 4R7/6050 W7/6050 26.72 22.92 3.80 14.22

R6/6051 W6/6051 25.63 21.19 4.44 17.32

R6/6052 W6/6052 28.30 23.97 4.33 15.30

40 Aisgill Avenue

R8/6050 W21/6050 Entrance Non-Habitable 0.00 0.00 0.00 0.00See window map 5066/WNECV-02in Appendix 4

R7/6051 W7/6051 31.12 26.42 4.70 15.10

R7/6052 W7/6052 31.57 26.91 4.66 14.76

38 Aisgill Avenue


in Appendix 4



DAYLIGHT ANALYSIS




R8/6051 W8/6051 31.16 26.49 4.67 14.99

R8/6052 W8/6052 31.63 26.99 4.64 14.67

36 Aisgill Avenue

R10/6050 W10/6050 Entrance Non-Habitable 26.42 22.62 3.80 14.38See window map 5066/WNECV-02in Appendix 4

R11/6050 W24/6050 0.00 0.00 0.00 0.00

R9/6051 W9/6051 27.42 22.79 4.63 16.89

R9/6052 W9/6052 30.07 25.45 4.62 15.36

34 Aisgill Avenue



R10/6051 W10/6051 31.23 26.59 4.64 14.86

R10/6052 W10/6052 32.05 27.39 4.66 14.54

1 Stainier Close

R1/6060 W1/6060 23.45 23.33 0.12 0.51

R2/6060 W2/6060 9.84 9.33 0.51 5.18R2/6060 W3/6060 7.39 6.61 0.78 10.55R2/6060 W4/6060 0.57 0.52 0.05 8.77R2/6060 W5/6060 7.56 6.67 0.89 11.77

R1/6061 W1/6061 29.70 29.18 0.52 1.75

R2/6061 W2/6061 23.88 21.62 2.26 9.46

2 Stainier Close

R3/6060 W6/6060 23.33 22.99 0.34 1.46

R4/6060 W7/6060 18.17 16.83 1.34 7.37R4/6060 W9/6060 18.81 17.16 1.65 8.77R4/6060 W10/6060 21.25 19.68 1.57 7.39

R3/6061 W3/6061 28.10 27.60 0.50 1.78

R4/6061 W4/6061 24.36 21.95 2.41 9.89

R1/6062 W1/6062 36.73 36.24 0.49 1.33

3 Stainier Close

R5/6060 W11/6060 23.24 22.94 0.30 1.29

R6/6060 W12/6060 Box light above door 10.59 10.10 0.49 4.63 Very R6/6060 W13/6060 very poor existing. No 9.65 7.84 1.81 18.76 minorR6/6060 W14/6060 perceptable alteration 1.46 0.39 1.07 73.29 existingR6/6060 W15/6060 10.47 8.46 2.01 19.20

R5/6061 W5/6061 29.51 29.13 0.38 1.29

R6/6061 W6/6061 24.22 21.93 2.29 9.45

4 Stainier Close

R7/6060 W16/6060 22.50 22.28 0.22 0.98

R8/6060 W17/6060 Box light above door 10.72 10.38 0.34 3.17 Very R8/6060 W18/6060 very poor existing. No 9.95 8.18 1.77 17.79 minorR8/6060 W19/6060 perceptable alteration 1.78 0.45 1.33 74.72 existingR8/6060 W20/6060 11.23 9.19 2.04 18.17

R7/6061 W7/6061 27.59 27.29 0.30 1.09

R8/6061 W8/6061 24.53 22.33 2.20 8.97

R2/6062 W2/6062 36.58 36.25 0.33 0.90

32 Aisgill Avenue

R1/6070 W1/6070 23.76 23.51 0.25 1.05



DAYLIGHT ANALYSIS




R2/6070 W2/6070 Significantly influenced 9.19 7.02 2.17 23.61 Very R2/6070 W5/6070 by existing architectural 0.01 0.00 0.01 100.00 minorR2/6070 W8/6070 features. See main body 7.64 4.52 3.12 40.84 existing

of report and windowmap 5066/WNECV-01 located in Appendix 4

R1/6071 W1/6071 30.08 29.73 0.35 1.16

R2/6071 W2/6071 24.01 21.22 2.79 11.62

30 Aisgill Avenue

R3/6070 W14/6070 23.41 23.24 0.17 0.73



R3/6071 W3/6071 28.56 28.29 0.27 0.95

R4/6071 W4/6071 24.07 21.61 2.46 10.22

R1/6072 W1/6072 36.81 36.50 0.31 0.84

28 Aisgill Avenue

R5/6070 W17/6070 23.48 23.40 0.08 0.34



R5/6071 W5/6071 30.02 29.84 0.18 0.60

R6/6071 W6/6071 23.99 21.86 2.13 8.88

26 Aisgill Avenue

R7/6070 W25/6070 23.38 23.33 0.05 0.21



R7/6071 W7/6071 28.76 28.61 0.15 0.52

R8/6071 W8/6071 24.16 22.34 1.82 7.53

R2/6072 W2/6072 36.82 36.61 0.21 0.57

24 Aisgill Avenue

R9/6070 W33/6070 23.78 23.75 0.03 0.13



R9/6071 W9/6071 30.20 30.08 0.12 0.40

R10/6071 W10/6071 24.27 22.71 1.56 6.43

22 Aisgill Avenue

R11/6070 W41/6070 23.45 23.44 0.01 0.04





DAYLIGHT ANALYSIS




R11/6071 W11/6071 28.89 28.80 0.09 0.31

R12/6071 W12/6071 24.23 22.94 1.29 5.32

R3/6072 W3/6072 36.83 36.66 0.17 0.46

20 Aisgill Avenue

R13/6070 W49/6070 23.62 23.61 0.01 0.04



R13/6071 W13/6071 30.33 30.25 0.08 0.26

R14/6071 W14/6071 24.25 23.14 1.11 4.58

18 Aisgill Avenue

R15/6070 W57/6070 23.43 23.43 0.00 0.00



R15/6071 W15/6071 28.89 28.83 0.06 0.21

R16/6071 W16/6071 24.58 23.65 0.93 3.78

R4/6072 W4/6072 37.27 37.14 0.13 0.35

16 Aisgill Avenue

R17/6070 W65/6070 27.16 27.16 0.00 0.00



R17/6071 W17/6071 32.44 32.38 0.06 0.18

R18/6071 W18/6071 24.62 23.85 0.77 3.13

14d Aisgill Avenue

R1/6080 W1/6080 14.61 14.61 0.00 0.00R1/6080 W2/6080 11.59 11.59 0.00 0.00R1/6080 W3/6080 7.84 7.84 0.00 0.00R1/6080 W4/6080 6.37 6.37 0.00 0.00R1/6080 W17/6080 33.53 31.95 1.58 4.71R1/6080 W18/6080 33.07 31.61 1.46 4.41

R9/6080 W28/6080 28.20 27.70 0.50 1.77R9/6080 W29/6080 28.75 28.27 0.48 1.67

R1/6081 W2/6081 33.04 31.47 1.57 4.75

R9/6081 W1/6081 33.61 31.90 1.71 5.09

14c Aisgill Avenue

R2/6080 W5/6080 16.35 16.35 0.00 0.00R2/6080 W6/6080 12.81 12.81 0.00 0.00R2/6080 W7/6080 8.79 8.79 0.00 0.00R2/6080 W8/6080 7.18 7.18 0.00 0.00R2/6080 W20/6080 32.13 30.77 1.36 4.23R2/6080 W21/6080 32.16 30.85 1.31 4.07

R6/6080 W22/6080 20.26 20.26 0.00 0.00

R2/6081 W4/6081 32.94 31.53 1.41 4.28

R6/6081 W5/6081 19.66 19.63 0.03 0.15

NO-SKY LINE (NSL)



DAYLIGHT DISTRIBUTION ANALYSIS

DDECVarea6east_Proposed 07/11/2013 1

Room/ Whole Prev New Loss %LossFloor Room Use Room sq ft sq ft sq ft

Sharnbrook House

R1/6020 177.0 172.6 172.6 0.0 0.0R2/6020 107.4 105.2 105.2 0.0 0.0R3/6020 122.0 120.0 120.0 0.0 0.0R4/6020 341.0 340.9 340.9 0.0 0.0R7/6020 121.7 112.9 112.9 0.0 0.0R8/6020 107.7 104.3 104.3 0.0 0.0R9/6020 178.5 173.7 173.7 0.0 0.0R1/6021 177.0 172.6 172.6 0.0 0.0R2/6021 107.4 105.2 105.2 0.0 0.0R3/6021 122.0 120.0 120.0 0.0 0.0R4/6021 106.2 103.0 103.0 0.0 0.0R5/6021 137.6 134.6 134.6 0.0 0.0R6/6021 106.3 103.6 103.6 0.0 0.0R7/6021 121.7 114.7 114.7 0.0 0.0R8/6021 107.7 105.9 105.9 0.0 0.0R9/6021 178.5 173.7 173.7 0.0 0.0R1/6022 177.0 172.6 172.6 0.0 0.0R2/6022 107.4 105.2 105.2 0.0 0.0R3/6022 122.0 120.0 120.0 0.0 0.0R4/6022 106.2 103.2 103.2 0.0 0.0R5/6022 137.6 134.6 134.6 0.0 0.0R6/6022 106.3 103.6 103.6 0.0 0.0R7/6022 121.7 114.9 114.9 0.0 0.0R8/6022 107.7 105.9 105.9 0.0 0.0R9/6022 178.5 173.7 173.7 0.0 0.0

41 Aisgill Avenue

R1/6030 167.8 139.9 139.9 0.0 0.0R1/6031 167.8 143.7 143.7 0.0 0.0R1/6032 167.8 144.6 144.6 0.0 0.0

39 Aisgill Avenue

R2/6030 167.2 139.1 139.1 0.0 0.0R2/6031 167.2 146.1 146.1 0.0 0.0R2/6032 167.2 146.5 146.5 0.0 0.0

37 Aisgill Avenue

R3/6030 167.9 142.3 142.3 0.0 0.0R3/6031 167.9 145.8 145.7 0.1 0.1R3/6032 167.9 147.6 147.5 0.1 0.1

35 Aisgill Avenue

R4/6030 168.1 135.8 135.8 0.0 0.0R4/6031 168.1 142.3 142.2 0.1 0.1R4/6032 168.1 142.9 142.7 0.1 0.1

33 Aisgill Avenue

R5/6030 168.0 136.6 136.4 0.1 0.1R5/6031 168.0 136.8 136.4 0.4 0.3R5/6032 168.0 137.4 137.2 0.3 0.2

31 Aisgill Avenue

R6/6030 167.8 133.4 130.7 2.7 2.0R6/6031 167.8 137.1 134.0 3.1 2.3R6/6032 167.8 136.0 135.3 0.7 0.5

29 Aisgill Avenue

R7/6030 168.6 135.0 134.2 0.8 0.6






R7/6031 168.6 136.7 136.7 0.0 0.0R7/6032 168.6 135.7 135.7 0.0 0.0

27 Aisgill Avenue

R8/6030 168.7 130.6 130.6 0.0 0.0R8/6031 168.7 133.4 133.4 0.0 0.0R8/6032 168.7 132.6 132.6 0.0 0.0

25 Aisgill Avenue

R9/6030 166.8 128.9 128.9 0.0 0.0R9/6031 166.8 129.1 129.1 0.0 0.0R9/6032 166.8 128.9 128.9 0.0 0.0

23 Aisgill Avenue

R10/6030 168.9 128.8 128.8 0.0 0.0R10/6031 168.9 129.5 129.5 0.0 0.0R10/6032 168.9 128.7 128.7 0.0 0.0

21 Aisgill Avenue

R11/6030 167.6 128.0 127.0 1.0 0.8R11/6031 167.6 128.5 127.5 1.0 0.8R11/6032 167.6 127.9 126.9 1.0 0.8

19 Aisgill Avenue

R12/6030 168.6 128.8 124.9 3.9 3.0R12/6031 168.6 130.9 126.9 4.1 3.1R12/6032 168.6 130.7 126.8 3.9 3.0

17 Aisgill Avenue

R13/6030 166.4 125.6 118.8 6.8 5.4R13/6031 166.4 127.9 120.0 7.9 6.2R13/6032 166.4 127.3 120.1 7.2 5.7

15 Aisgill Avenue

R14/6030 169.0 130.5 120.0 10.5 8.0R14/6031 169.0 128.9 118.7 10.2 7.9R14/6032 169.0 128.3 118.3 10.0 7.8

13 Aisgill Avenue

R15/6030 168.0 124.5 113.2 11.3 9.1R15/6031 168.0 127.1 115.0 12.2 9.6R15/6032 168.0 126.5 115.1 11.5 9.1

11 Aisgill Avenue

R16/6030 162.1 124.7 111.9 12.8 10.3R16/6031 162.1 124.7 110.3 14.4 11.5R16/6032 162.1 124.0 109.9 14.1 11.4

9 Aisgill Avenue

R17/6030 169.0 135.4 120.1 15.3 11.3R17/6031 169.0 137.2 120.4 16.8 12.2R17/6032 169.0 136.4 120.5 15.9 11.7






7 Aisgill Avenue

R18/6030 162.7 122.9 106.4 16.4 13.3R18/6031 162.7 123.2 105.0 18.2 14.8R18/6032 162.7 129.4 112.4 17.1 13.2

5 Aisgill Avenue

R19/6030 161.6 136.0 117.7 18.3 13.5R19/6031 161.6 139.5 121.2 18.4 13.2R19/6032 161.6 139.0 122.2 16.8 12.1

3 Aisgill Avenue

R20/6030 168.1 147.9 147.3 0.6 0.4R20/6031 168.1 149.0 145.5 3.5 2.3R20/6032 168.1 147.9 147.9 0.0 0.0

1 Aisgill Avenue

R21/6030 168.4 148.0 146.4 1.6 1.1R21/6031 168.4 151.2 149.7 1.5 1.0R21/6032 168.4 150.1 150.0 0.1 0.1

52 Aisgill Avenue

R1/6050 40.0 38.5 37.6 0.9 2.3R1/6051 175.1 171.2 171.2 0.0 0.0R1/6052 175.1 171.2 171.2 0.0 0.0

50 Aisgill Avenue

R2/6050 40.0 33.4 32.5 0.9 2.7R2/6051 164.0 161.3 161.2 0.2 0.1R2/6052 164.0 162.2 162.2 0.1 0.1

48 Aisgill Avenue

R3/6050 40.0 35.7 31.9 3.8 10.6R3/6051 175.3 173.4 171.1 2.4 1.4R3/6052 175.3 173.4 171.3 2.1 1.2

46 Aisgill Avenue

R4/6050 40.0 34.6 34.0 0.6 1.7R4/6051 169.2 167.5 166.1 1.4 0.8R4/6052 169.2 167.5 166.2 1.2 0.7

44 Aisgill Avenue

R5/6050 40.0 38.7 32.1 6.6 17.1R5/6051 164.1 161.5 159.0 2.5 1.5R5/6052 164.1 162.4 160.4 2.0 1.2

42 Aisgill Avenue

R6/6050 40.0 37.9 37.0 0.9 2.4R7/6050 104.3 103.4 103.4 0.0 0.0R6/6051 163.6 161.2 154.8 6.4 4.0R6/6052 163.6 161.9 156.1 5.8 3.6

40 Aisgill Avenue

R8/6050 40.0 0.0 0.0 0.0 0.0






R7/6051 172.8 171.0 162.4 8.6 5.0R7/6052 172.8 171.0 162.6 8.5 5.0

38 Aisgill Avenue

R9/6050 40.0 37.9 35.4 2.5 6.6R8/6051 171.8 170.0 161.5 8.4 4.9R8/6052 171.8 170.0 161.5 8.4 4.9

36 Aisgill Avenue

R10/6050 110.8 109.8 100.8 9.0 8.2R11/6050 40.0 0.0 0.0 0.0 0.0R9/6051 164.3 161.9 153.1 8.8 5.4R9/6052 164.3 162.6 153.8 8.8 5.4

34 Aisgill Avenue

R12/6050 40.0 35.9 29.6 6.4 17.8R10/6051 171.7 167.6 158.5 9.1 5.4R10/6052 171.7 167.9 158.6 9.2 5.5

1 Stainier Close

R1/6060 107.0 92.4 92.4 0.0 0.0R2/6060 68.5 64.4 64.2 0.2 0.3R1/6061 107.0 101.7 101.7 0.0 0.0R2/6061 68.5 64.3 64.3 0.0 0.0

1 Stainier Close

R3/6060 112.0 96.5 96.5 0.0 0.0R4/6060 55.4 54.4 54.4 0.0 0.0R3/6061 112.0 103.0 103.0 0.0 0.0R4/6061 55.4 52.0 52.0 0.0 0.0R1/6062 171.7 168.5 168.5 0.0 0.0

1 Stainier Close

R5/6060 101.9 89.3 89.3 0.0 0.0R6/6060 72.1 67.3 67.3 0.0 0.0R5/6061 101.9 97.2 97.2 0.0 0.0R6/6061 72.1 67.6 67.6 0.0 0.0

1 Stainier Close

R7/6060 103.4 89.8 89.8 0.0 0.0R8/6060 74.9 69.1 69.1 0.0 0.0R7/6061 103.4 95.1 95.1 0.0 0.0R8/6061 74.9 70.2 70.2 0.0 0.0R2/6062 174.3 171.1 171.1 0.0 0.0

32 Aisgill Avenue

R1/6070 104.6 95.3 95.3 0.0 0.0R2/6070 71.6 68.4 59.2 9.2 13.5R1/6071 104.6 100.4 100.4 0.0 0.0R2/6071 71.6 67.2 65.8 1.4 2.1

30 Aisgill Avenue

R3/6070 104.2 94.0 94.0 0.0 0.0R4/6070 72.2 68.9 61.8 7.1 10.3R3/6071 104.2 97.7 97.7 0.0 0.0R4/6071 72.2 67.7 67.3 0.4 0.6






R1/6072 178.0 174.9 174.8 0.1 0.1

28 Aisgill Avenue

R5/6070 97.9 88.1 88.1 0.0 0.0R6/6070 75.6 65.5 59.3 6.2 9.5R5/6071 97.9 93.7 93.6 0.1 0.1R6/6071 75.6 70.9 70.9 0.0 0.0

26 Aisgill Avenue

R7/6070 100.9 90.6 90.6 0.0 0.0R8/6070 75.6 70.8 66.1 4.7 6.6R7/6071 100.9 94.4 94.4 0.0 0.0R8/6071 75.6 70.9 70.8 0.1 0.1R2/6072 173.8 170.8 170.8 0.0 0.0

24 Aisgill Avenue

R9/6070 99.4 88.8 88.8 0.0 0.0R10/6070 70.8 67.6 65.4 2.2 3.3R9/6071 99.4 94.5 94.5 0.0 0.0R10/6071 70.8 66.4 66.4 0.0 0.0

22 Aisgill Avenue

R11/6070 111.5 101.9 101.9 0.0 0.0R12/6070 71.3 62.7 62.1 0.6 1.0R11/6071 111.5 105.1 105.1 0.0 0.0R12/6071 71.3 66.8 66.8 0.0 0.0R3/6072 173.4 170.6 170.6 0.0 0.0

20 Aisgill Avenue

R13/6070 100.6 90.4 90.4 0.0 0.0R14/6070 71.0 67.5 66.7 0.8 1.2R13/6071 100.6 96.5 96.5 0.0 0.0R14/6071 71.0 66.5 66.5 0.0 0.0

18 Aisgill Avenue

R15/6070 107.5 97.6 97.6 0.0 0.0R16/6070 69.9 66.9 66.9 0.0 0.0R15/6071 107.5 101.2 101.2 0.0 0.0R16/6071 69.9 65.6 65.6 0.0 0.0R4/6072 174.1 171.3 171.3 0.0 0.0

16 Aisgill Avenue

R17/6070 100.3 93.9 93.9 0.0 0.0R18/6070 74.8 65.0 64.9 0.1 0.2R17/6071 100.3 96.2 96.2 0.0 0.0R18/6071 74.8 70.1 70.1 0.0 0.0

14d Aisgill Avenue

R1/6080 85.2 81.7 81.7 0.0 0.0R9/6080 206.1 204.1 204.1 0.0 0.0R1/6081 39.9 34.9 34.9 0.0 0.0R9/6081 73.9 71.4 71.4 0.0 0.0

14c Aisgill Avenue

R2/6080 86.6 84.9 84.9 0.0 0.0R6/6080 114.3 106.1 106.1 0.0 0.0






R2/6081 40.6 34.2 34.2 0.0 0.0R6/6081 114.3 106.9 106.9 0.0 0.0

ANNUAL PROBABLE SUNLIGHT HOURS (APSH)



SUNLIGHT ANALYSIS

SECVarea6east_Proposed 07/11/2013 1/1

Window RoomExisting Proposed Existing Proposed

Room Winter Annual Winter Annual Winter Annual Winter Annual Winter Annual Winter AnnualRoom Window Use APSH APSH APSH APSH %Loss %Loss APSH APSH APSH APSH %Loss %Loss

28 Aisgill Avenue

R6/6071 W6/6071 0 12 0 6 - 50.0 0 12 0 6 - 50.0

14d Aisgill Avenue

R9/6080 W28/6080 17 73 15 69 11.8 5.5 R9/6080 W29/6080 18 74 17 71 5.6 4.1 19 75 18 72 5.3 4.0

APPENDIX 4 WINDOW MAPS

APPENDIX 5 SITE PHOTO

daylight sunlight report - myearlscourt.com and... · establishment guidelines entitled ‘site...

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