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UDC

69.021.15

All advice or information in this

publication is intended for those who

will evaluate the significance and

limitationsof its contentsand take

responsibilit yf or itsuse and

application. N o liability (including that

for negligence) for anylossresulting

from such advice or inform ation is

accepted. Readers should note that

all publications are subject to revision

from time to time and should

therefore ensure that theyare in

possession of the latest version.

© Bri tish Cement Association

First published August 2001

Figura Design Limited

6 St Editha’sCourt

Church Eaton

Staffordshire

ST20 0AT

architects@ figura-design.co.uk

The Ready-mixed Concrete Bureau

CenturyHouse, Telford A venue

Crowthorne, Berkshire RG45 6Y S

info@ rcb.org.uk

www.rcb.org.uk

www.nu-trenchfloor.com

The designs are based on

the architectural model

displayed by the RCB a t

exhibitions as part of the

Basement DevelopmentGroup initiative.

These August 2001 co sts

of new build basement

construction are for

guidance only and include

labour, materials and plant

but exclude developer’s

margin, land costs,

professional a nd o ther fees.

It may be possible for Figura 

D esign to provid e definiti ve 

costs for a ful ly designed 

scheme.

architects@ figura-design. co.uk

The Ready-mixed Concrete Bureau 

6 MODEL BASEMENTSFRO M FIG URA D ESIG N

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COST OF BASEMENT CONSTRUCTIONO ption 1 - Drawing 006/01

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil onlyw ith no excavation i n any type of rock.

2. The site isnot waterlogged.

3. The site drainsare deep enough to accomm odate foul drainag e outfall from basement.

A dditional cost will be incurred if f oul water drainage hasto be pumped i nto the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accommodated on

site as fill or embankm ents.

5. The surface water drainage from li ght wells etc can be discharged into soakaw ays

situated on site.

£22,000 £580 per m2

Design 1 - Basement G arage

Basement

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COST OF BASEMENT CONSTRUCTIONO ption 2 - Drawing 006/02

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil only with no excavation in any type of rock.

2. The site isnot w aterlogged.

3. The site drainsare deep enough to accomm odate foul drainag e outfall from basement.

Ad ditional cost will be incurred if foul water drainage hasto be pump ed into the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accomm odated on

site as fill or embankm ents.

5. The surface water drai nage from li ght wells etc can be discharged into soakaways

situated on site.

6. The fit out of the gymnasium i sexcluded.

£41,000 £841 per m 2

Design 2 - G ymnasium

Basement

BasementLight Well

Light Well

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COST OF BASEMENT CONSTRUCTIONO ption 1 - Drawing 006/03

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil onlyw ith no excavation i n any type of rock.

2. The site isnot w aterlogged.

3. The site drains are deep enough to accommodate foul drai nage outfall from basement.

Addi tional cost will be incurred if foul water drainage hasto be pum ped into the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accomm odated on

site as fill or embankments.

5. The surface water drai nage from li ght wells etc can be discharged into soakaw ays

situated on site.

6. The fit out of t he gamesroom, bar and wine cellar is excluded.

£64,000 £960 per m 2

Design 3 - Courtyard G arden

Basement

CourtyardGarden

Basement

Basement

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COST OF BASEMENT CONSTRUCTIONO ption 1 - Drawing 006/04

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil only with no excavation in any type of rock.

2. The site isnot waterlogged.

3. The site drainsare deep enough to accomm odate foul drainag e outfall from basement.

A dditional cost will be incurred if f oul water drainage hasto be pumped i nto the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accommodated on

site as fill or embankm ents.

5. The surface water drainage from li ght wells etc can be discharged into soakawa ys

situated on site.

£68,000 £860 per m2

Design 4 - Bedroom / Bedsit

Basement

Basement

Basement

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COST OF BASEMENT CONSTRUCTIONO ption 5 - Drawing 006/05

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil onlyw ith no excavation i n any type of rock.

2. The site isnot waterlogged.

3. The site drainsare deep enough to accomm odate foul drainag e outfall from basement.

A dditional cost will be incurred if f oul water drainage hasto be pumped i nto the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accommodated on

site as fill or embankm ents.

5. The surface water drainage from li ght wells etc can be discharged into soakaw ays

situated on site.

£27,000 £800 per m2

Design 5 - Split Level

BasementLight Well

Basement Light Well

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COST OF BASEMENT CONSTRUCTIONO ption 6 - Drawing 006/06

The following assumptions apply to the costing: 

1. The basement site consists of sub-soil only with no excavation in any type of rock.

2. The site isnot w aterlogged.

3. The site drainsare deep enough to accomm odate foul drainag e outfall from basement.

Add itional cost will be incurred if foul water drainage hasto be pum ped into the site

drainage system.

4. O ne quarter of the excavated material from the basement etc can be accomm odated on

site as fill or embank ments.

5. The surface water drai nage from li ght wells etc can be discharged into soakaways

situated on site.

£36,000 £845 per m2

Design 6 - Top-lit Basement

Basement

Basement

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H istory of Basements

It’s already out there

What is a Basement?

Basements are nothing new, some of our most fa mous and respected buildings

and a rchitects have in previous centuries exploited the potential o f a basement asa ha bitable option. In fa ct basements can be found in some of our earliest churchesand religious buildings.

Prior to the first world war basements were commonly used as accommodation fordomestic staff. Their inclusion within t he building structure was o ften mad e simplebecause of the need to dig d eep foundations due to the lack of high tech buildingtechniques and, of course, at t hat t ime there were no restrictions on the density ofpersons living together within the building footprint.

After the wa r there were fewer people entering domestic service so the need foraccommoda tion ‘below stairs’ wa s reduced. The demand fo r cheap volume housingsoared a nd large a reas of land were released for development in the suburbs. Thisincrease in social housing came hand in hand with va stly improved transportinfrastructure and the birth of urban sprawl was underway.

The wheel is now turning full circle – land is in short supply and the governmentwishes to increase housing density. M eanwhile this nation o f house owners isdemanding more individual space w ithin their ‘castle’.

The basement is the lowest floor o f a building,

usually, but not always, fully below ground.The basement can often be considered the floorlevel below the primary entry level.

Basement/n. the lowest

floor of a building usu. at

least partly below ground

level. [probably Dutch,

perhaps from Italian

basamento ‘column-base’]

One reason for selecting a ba sement route to increase the floor area o f a pro perty isto o vercome planning objections. Often development of a plot w ill be restricted by

the influences of neighbouring properties or local authorities. Planning d epartmentscurrently tend t o restrict height, and in ma ny instances are more likely to allow increased volume below ground.

Here a traditional house with a two-storeyfrontage has cut away the garden to createa complete extra floor at ba sement level.

If you’re still in doubt, just remember that inthis country there are thousands of examples ofdomestic architecture successfully completedwith a basement. Many of these date back morethan 100 y ears but some w ere completed in thelast few years.

In the United Kingdom last y ear 1.7% of

all new housing included a basement. Peopletoday are again starting to see the benefits of abasement and a re getting maximum living spacefrom t heir building plots.

Planning Restrictions