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Mass Appraisal Analysis and Benchmarks
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Fred Chmura, AAS & Rick Stuart, CAE
2014Revised 2016
TEAM Consulting LLC
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3
• Introduction of instructor & workshop
• Provide guidelines and suggestions on mass appraisal
• Everything from USPAP to trending
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USPAP• What is USPAP?
• Why USPAP was developed
• The Appraisal Foundation
• Who must comply with USPAP
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USPAP• Rules
o Ethics ConductManagement Confidentiality
• Record Keeping
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USPAP
• Rules – continuedo Competency
• Jurisdictional Exception
• Ten Standards
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USPAP• Standard 6 – Mass Appraisal Development and
Reporting
o Some of the ‘musts’ when developing a report
o Credible assignment results
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USPAP• Standard 6 – Mass Appraisal Development and
Reporting
o Developing an appraisal
o Credible assignment results and in applying a calibrated model
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USPAP• Standard 6 – Mass Appraisal Development and
Reporting
o Reconciling a mass appraisal
o Written report
o Signed certification
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Scope of Work• Type and extent of research
• Inclusions
• Work acceptability
• Sample in Appendix 2
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Scope of Work• Planning first
o Taking inventory
o Gantt chart
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Mass Appraisal• Mass appraisal definition
• Additional description
• Data quality and quantity
• Subjective data
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Mass Appraisal
• Quality control
• Possible queries
• QC as an intricate part of appraisal practices
• Establishing consistency
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Market Value• Definition
• Emphasis on the definition will be discussed in several sections.
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Highest & Best Use• Type of property could play a major role
• Highest net return to the property over a reasonable period of time
• Unique or non-conforming, may mean the current use is not the highest and best use
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Highest & Best Use• Four tests for highest and best use
o Legally permissibleo Physically possibleo Financially feasibleo Maximum productivity
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Highest & Best Use• Historical properties
o Federal and state restrictions
o International Valuation Standards Committee
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Highest & Best Use• Some considerations for historic properties
o Specific governmental restrictions
o Market acceptance, architectural styles and recycling
o Rehabilitation programs
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Highest & Best Use• Some considerations for historic properties -
continued
o Normal maintenance may mean current use
o Unique and non-conforming
o Local landmark ordinances
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Highest & Best Use
• Some considerations for historic properties –continued
o Current use not highest and best use
o Comparable sales
o How adaptable to the most economic use
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Highest & Best Use
• Adaptive use
• Potential changes
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Neighborhood Analysis• Neighborhood definition
• Tendency for too many neighborhoods
• Neighborhood profiles
• Use of GIS and example of use
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Neighborhood Analysis• Assignment of neighborhoods and cluster for
valuation models
• Groupings can help establish adjustments and benchmarks
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Neighborhood Analysis• Gentrification
• Various definitions
• Typical participants
• A large number of cities are experiencing this
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Neighborhood Analysis• Gentrification
• Market issues
• Kansas City
• Minneapolis
• Various Texas cities
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Neighborhood Analysis• Gentrification
• Kootenai County, Idaho
• Background• The Fort Grounds• Realtor comments• Period of transition• Stratification of sales is a key
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Neighborhood Analysis• Gentrification
• Kootenai County, Idaho
• Adjustments by water proximity• Sales data plotted• Documentation
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Benchmarks
• Benchmark definition
• Various uses of benchmarks
• Various examples
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Benchmarks• Example #1 – Effective Age
o Definition of effective age
o When it is considered
o Steps in estimating the total depreciation
o Using depreciation schedule for effective age
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Benchmarks• Quick Ref#: 5176 Sale Amount: $45,000
• Sale Date: March 2014
• Indicated NBHD Depreciation Assignment: AV+
• Year Built: 1910
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Benchmarks
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Benchmarks
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Sale amount $45,000Less: Land value - $5,420Less: Other improvements
- $570
House value $40,150RCN $68,920% Good 0.58 = 58%Indicated effective year built
1987
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Benchmarks• Example #2 – Market Conditions
o Use of the median ratio for a series of sales can help measure market conditions (time trends).
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Benchmarks• Median sales ratio for 2011 = 104.67
• Median sales ratio for 2012 = 100.58
• Median sales ratio for 2013 = 97.83
• Trends in the market or neighborhood can be established
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Benchmarks• Median sales ratio for 2011 = 104.67 ÷ 100.58 =
1.0407 = 4.07% trend
• Median sales ratio for 2012 = 100.58 ÷ 97.83 = 1.0281 = 2.81% trend
• Median sales ratio for 2013 = 97.83
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Benchmarks
• Information from one jurisdiction that TEAM conducted an analysis indicates market increases per quarter of the year.
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Benchmarks
Statistic All 2012 Sales 1st Qtr. 2013
Median 96.55 94.36
COD 13.62% 15.51%
PRD 1.04 1.04
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Benchmarks
Statistic 2nd Qtr. 2013 3rd Qtr. 2013
Median 92.50 92.26
COD 16.17% 16.45%
PRD 1.05 1.06
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Benchmarks
• Example #3 – Sale price to asking price ratios
• Check against market trends and a check for setting values
• Crucial that you always use original asking price for consistency
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Benchmarks• The example is for high-end homes
• Market data that disproved the jurisdiction’s belief the market was going down for the higher valued homes
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Benchmarks
• Example #4 – Keeping RCN current
• Commercial service
• Actual cost
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Benchmarks• Additional TEAM extracted benchmarks
o Represents a recap of indicated value loss
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Benchmarks• Additional TEAM extracted benchmarks -
continued
o Others will be shown later in the workshop relating to obsolescence
o Remember: benchmarks are a guide and you still have to function as an appraiser and apply judgment
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Sales Validation
• Starts with good written procedures
• Make responding as easy as possible for the public
• It is typical that this is one of the most misunderstood processes in the assessment office.
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Sales Validation• Often bad ratio indications are the results of poor
sales validation process
• The author’s of this workshop believe in on-site inspection of all apparently valid sales
• A sample is provided in Appendix 3
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Sales Ratio Analysis
• Sales ratio studies are perhaps the best tool we have in our tool box and we do not use them often enough and effectively
• Definition of key terms
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Sales Ratio Analysis
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o A new statistical measure of vertical inequity that is being included in sales ratio study analysis is the Price Related Bias (PRB).
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Sales Ratio Analysis
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o This new statistic measures the percentage increase (decrease) in assessment ratios in relation to the percentage increase (decrease) to property values
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Sales Ratio Analysis
Marion Johnson, CAE & Rick Stuart, CAE TEAM Consulting. LLC
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o In several states this new statistic measure of vertical inequity is replacing the Price Related Differential (PRD).
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Sales Ratio Analysis
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o All ratios can be above or below one; it is how they compare with each other that matters. Unlike the PRD, the PRB determines if inequity exists, as well as quantifies the extent of vertical inequity.
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Sales Ratio Analysis
Marion Johnson, CAE & Rick Stuart, CAE TEAM Consulting. LLC
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o The PRB asks the question, “What happens to ratios when property values double, or are cut in half?”
o The PRB is calculated after removing extreme ratios.
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Sales Ratio Analysis
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRBo Simple linear regression analysis is used to
calculate the PRB. o The PRB can be interpreted as the expected
change in ratios as property values double or are halved. If ratios increase as property values increase, the resulting PRB will be positive.
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Sales Ratio Analysis
Marion Johnson, CAE & Rick Stuart, CAE TEAM Consulting. LLC
• Section 9 - Mass Appraisal Statistics – continued
o Price Related Bias – PRB
o A PRB greater or less than 3% may indicate a bias. A PRB greater or less than 5% is cause for further inspection.
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Sales Ratio Analysis
• Example #1
o Several examples are shown from the same neighborhood
o Quick check for sale chasing
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Sales Ratio Analysis
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
$0 $50,000 $100,000 $150,000
Ratios
Sales Price
Scatter Diagram of Sales Ratios
Ratio
Best Fit
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Sales Ratio Analysis• A quick review of the scatter diagram shows
some very high ratios from approximately $50,000 and under.
• The PRD would probably be well over 1.00 and thus regressive as the sales over $50,000 seem to be good but this means the lower sales are over-appraised.
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Sales Ratio AnalysisStatistical Measure
Appraised Value Cost Approach Value
Sales Approach Value
Median 103.21 134.80 101.06
COD 41.49 36.86 29.45
PRD 1.17 1.15 1.15
# of Valid Sales 45 45 44
# of Trimmed Sales
0 0 0
# of Outliers 0 0 2
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Sales Ratio Analysis
• Overall ratio does not paint a true picture
• Actual ratio showed 1.00 median and low COD
• All approaches to value should generate approximately the same value
• One problem was the person verifying the sales
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Sales Ratio Analysis• What do we check in the ratios to see why the
cost approach values are so bad?
• Results of the review
• On-site checks for data errors and/or negative influences
• Example of recognizing negative influences
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Sales Ratio Analysis• Process used to establish adjustments
• Recap of adjustments
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Sales Ratio Analysis• Example #2
o Working with limited sales
o Start with the big picture
Ratio results
Scatter diagram
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Sales Ratio Analysis
• Example #2 – continued
o Breaking down the ratios
Neighborhood
House style
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Sales Ratio Analysis
• Example #3
o Using ratios to confirm or disprove observations
o The market is the boss
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Sales Chasing• Do not sale chase
• Definition of sales chasing
• Again, a tendency to create too many neighborhoods
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Sales Chasing
• Test is sales ratio
• Corrections are not necessarily sales chasing
• One method to prevent bias and sales chasing
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Trending• Definition of trending
• When it can be used
• Example and formula for calculating a trend
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Mass Appraisal Template & Conclusions
• Template in Appendix 5
• Conclusion - Application is more difficult than establishing a mass appraisal plan
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