This page provides basic descriptions of the key variables used in this study after they were prepared.

Datasets for Residential Properties with an Improvement (Building)

PROPERTY: Information on location and general characteristics of the property

IMPROVEMENT DWELLING: Information on the dwelling

INTERIOR IMPROVEMENT DWELLING:  Information on the interior of the dwelling

ASSESSMENTS:  Information on the assessment per a property

REAL ESTATE ASSESSMENT PAYMENT HISTORY:   Information on the annual taxes per a property

SELLING: Information on when a property changed ownership with some value attached.

Property:

Year N Weighted N Unit of Observation
2009

60,261

100,991

Residential Property with a housing unit
2010

60,203

101,867

Residential Property with a housing unit
2011

60,465

102,299

Residential Property with a housing unit
2012

60,688

102, 511

Residential Property with a housing unit
2013

60,966

103,987

Residential Property with a housing unit
2015 60,831 111,822 Residential Property with a housing unit

Improvement Dwelling:

Year N Weighted N Unit of Observation Number of properties not in Properties Dataset Number of properties in Properties Dataset missing

2009

59,608 59,880 Dwelling 0 728
2010 59,175 59,445 Dwelling 0 1,103
2011 59,236 59,507 Dwelling 0 1,304
2012 59,304 59,582 Dwelling 0 1 1,459
2013 59,440 60,123 Dwelling 0 1, 601
2015 60,187 62,905 Dwelling 0 733

Improvement Interior Dwelling:

Year N Weighted N Unit of Observation Number of properties not in Properties Dataset Number of properties in Properties Dataset missing

2009

59,558 59,880 Dwelling 0 728
2010 59,493 59,817 Dwelling 0 745
2011 59,764 60,112 Dwelling 0 748
2012 59,983 60,329 Dwelling 0 761
2013 60,268 60,589 Dwelling 0 768
2015 600,186 62,904 Dwelling 0 73

Assessment (Data CDs):

Year N Unit of Observation Number of properties not in Properties Dataset Number of properties in Properties Dataset missing
2009 58,889 Year Assessment-Property 0 770

2010

59,295 Year Assessment-Property 0

294

2011 59,595 Year Assessment-Property 0

257

2012 59,744 Year Assessment-Property 0 336
2013 59,909 Year Assessment-Property 0 420

Assessment (API):

Year N Unit of Observation Number of properties not in Properties Dataset Number of properties in Properties Dataset missing
2009 13,648 Year Assessment-Property 0 46,416

2010

44,487 Year Assessment-Property 0

15,194

2011 47,246 Year Assessment-Property 0

12,749

2012 48,655 Year Assessment-Property 0 11,497
2013 45,282 Year Assessment-Property 0 15,190
2015 48,579 Year Assessment-Property 0 11,711

Real Estate Assessment Payment History:

Year N Unit of Observation Number of properties not in Properties Dataset Number of properties in Properties Dataset missing
2009 13,466 Year-Property 0 46,600

2010

43,297 Year-Property 0

16,396

2011 45,799 Year-Property 0

14,211

2012 47,203 Year-Property 0 12,962
2013 44,059 Year-Property 0 16,427

** 2015 not included as there are payments have not been made for the levies.

Selling:

Year N Unit of Observation Number of properties not in Properties Dataset
2009 3,371 Market Value Transaction of non Multifamily residential 0

2010

3,126 Market Value Transaction of non Multifamily residential 0
2011 2,709 Market Value Transaction of non Multifamily residential 0
2012 3,048 Market Value Transaction of non Multifamily residential 0
2013 3,197 Market Value Transaction of non Multifamily residential 0
2015 1,291 Market Value Transaction of non Multifamily residential 0

 

AC Real Estate and PUMS data

Is the PUMS data different than the AC Real Estate data?

Note: The Null hypothesis with these chi-square tests is that the observed (PUMS) values are not different than the expected (AC).

Result: The PUMS do appear to be different than the AC Real Estate Data .

Bedrooms

Year
X2
DF
p-value
2013 26.22 5 <0.000

Year Built

Year

X2

DF
p-value
2013  1,483.5 8 <0.000

AC Real Estate and ACS data

Is the the ACS data different than the ACS Real Estate?

Note: The Null hypothesis with these chi-square tests is that the observed (ACS) values are not different than the expected (AC).

Result: The AC and the ACS data do seem to come from the same population

Bedrooms

Year
X2
DF
p-value
2013 30 5 .224

Year Built

Year
X2
DF
p-value
2013 72 8 .230

Data Elements (Click or Scroll Down to see Description)

Note:

The variables mentioned in the data description below that have a suffix of ACS are those data that were recoded to match the categorization that ACS uses.

The box plots presented below have outliers hidden. box plot  is a graphical rendition of statistical data based on the minimum, first quartile, median, third quartile, and maximum.

 



Property Type

Data Set: Property

Variable: PropertyTypeACS

Population: Residential properties with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

 

Weighted N

Missing

 

Condo

MultiFamily

Single Family-Attached

Single Family Detached

Unknown Affordable Dwelling Unit

2009 100,991 0   26,288 41,166 6,312 27,145 80
2010 101,867 0   26,035 42,115 6,393 27,232 92
2011 102,299 0   26,054 42,264 6,470 27,419 92
2012 102,511 0   26,183 42,268 6,512 27,460 88
2013 103,987 0   26,231 43,496 6,563 27,518 89
2015 111,822 0  

26,375

49,014

6,352

27,277

2,804

 


 

Number of Units in Building

Data Set: Property

Variable: NumberofUnitsACS

Population: Residential properties with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

 

Weighted N

Missing

 

1-Attached

1-Detached

2 Units

3 or 4 units

5 to 9 units

10 to 19 units

20 to 49 units

50 or more Units Unknown
2009 100,991 0   5,7702 27,145 540 79 1,108 2,066 5,340 58,735 206
2010 101,867 0   5,858 27,232 544 91 1,101 2,031 5,336 59,441 233
2011 102,229 0   5,934 27,419 5402 91 1,101 2,016

5,359

59,600 237
2012 102,511 0   5,976 27,460 238 91 1,100 2,017 5,345 59,736 248
2013 103,987 0   6,024 27,518 542 12 334 1,220

4,635

63,239   463
2015 111,822 0  

6,356

27,276

558

12

283

1,163

4,503

71,810 419

 


 

Year Built

Dataset: Property

Variable: YearBuiltACS (Combination of property and dwelling year built)

Population: Residential properties with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

  Weighted N Missing  

1939 or earlier

1940 - 1949

1950 - 1959

1960 - 1969

1970 - 1979

1980 - 1989

1990 - 1999

2000 - 2009

2010 or later

2009 99,595 1,396   9,559 20,440   17,084   15,993   4,122   11,899   7,375   13,123   ---
2010 101,025 842   9,606 20,421     17,061   16,151 4,125   11,988   7,372   14,281   20
2011 101,427 844   9,572 20,430   17,082   16,170   4,126   11,904   7,375   14,566   212
2012 101,462 780   9,599 20,286   16,925   15,929 4,124   11,897   7,374   14,593   735  
2013 97,365 6,622   9,495 18,267 16,403   13,560   4,112   11,726   6,015   15,952   1,835  
2015 106,076

5,746

 

9,081

17,478

16,297

15,680

4,096

11,470

7,360

18,692

5,952

 


 

Number of Bedrooms

Dataset: InteriorDwellingImrpovement

Variable: BedCountACS

Population: Residential Dwellings with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

 
Weighted N

Missing

  0 1 2 3 4 5 or more
2009 59 880 0   8,841     10,704 17,167   15,428   5,481 2,259
2010 59,817 0   8,079   11,006     17,230   15,504   5,501   2,497
2011 60,112 0   7,807     10,967     17,195 15,748 5,712     2,683
2012 60,329 0   7,545     10,946 17,180   15,801 5,970 2,887
2013 60,589 0   7,343 10,943 17,093   15,798 6,280     3,132
2015 62,904  0   6,408 12,022 18,752 15,475 6,699

3,548

 

Yet, not all parcels with 0 bedrooms listed are fully accurate. This becomes apparent when looking at the accessed values for 0-bedrooms. 

 


 

Presence of a Bathroom

Dataset: InteriorDwellingImrpovement

Variable: BathACS

Population: Residential Dwellings with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

 

Weighted N

Missing

  With at least 1 Full Bath No Full Bath
2009 59,880 0   58,788   1,092    
2010 59,817 0   59,209     608
2011 60,112 0   59,542     570    
2012 60,329 0   59,681     648    
2013 60,589 0   59,862     727    
2015 62,904 0   54,443 8,461

 


 

Heating Fuel

Dataset: DwellingImrpovement

Variable: HeatingACS

Population: Residential Dwellings with a building

Weights: Values were weighted base on number of units

Class: Factor

Frequency Table:

  Weighted N Missing  

Electricity

Fuel oil, kerosene, etc.

No Fuel Used Other Fuel Solar energy Unknown Utility gas Wood
2009 32,565 27,315   70 5 1   5 1   31,723 759 1  
2010 32,675 26,773   72 5   1 5 1   31,823 764 1  
2011 32,736 26,771   71   5 1   5 1   31,885 767 1  
2012 32,756 26,826   71   5 1 5 1   31,906 766 1  
2013 32,805 27,318   71 5 1   5 1   31,952 769 1  
2015 62,883 22   179

6

3 9 1 52,229 10,455 1

 


 

Assessment Amount (DATA CD)

Dataset: Data CD Assessments

Variable: Totl

Years: 2009-2013

Population: Residential properties with a building that had an assessment conducted

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Assessment (CD) Table above

Number missing: 0

Class: Numeric

Range: 9,700  —  33,886,900

Standard Deviation:  346,078

Assessment Amount in Constant 2013 Dollars (DATA CD)

Dataset: Data CD Assessments

Variable: Totl2013

Years: 2009-2013

Population: Residential properties with a building that had an assessment conducted

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Assessment (CD) Table   above

Number missing: 0

Class: Numeric

Range: 9,700  —  35,215,593

Standard Deviation:  358,405.7

Assessment Amount

Dataset: API Assessments

Variable: Total.Value.Amount

Years: 2009-2015

Population: Residential properties with a building that had an assessment conducted

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Assessment (API) Table    above

Number missing: 0

Class: Numeric

Range: 9,700  —  33,886,900

Standard Deviation:  341,747.5

There were 538 Assessments classified under "New Construction." Of these, 546 have no land value associated with them (Even if there were land values in the previous and following years. " I n 2012 the procedure changed so anything before you will see the new construction amount posted with no land value. Technically, land can not change in the middle of the year only at reassessment so previous they chose not to post the land value." At the same time, the improvement value for these observations are significantly lower than the improvement value the following year. Cannot remove as unsure if these are occupied housing. Instead, the  land value for the following year was brought back to replace the 0 Land Value and a new total created.

 

 

Assessment Amount in Constant 2013 Dollars

Dataset: API Assessments

Variable: Total.Value.Amount.Constant2013

Years: 2009-2015

Population: Residential properties with a building that had an assessment conducted

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Assessment (API) Table      above

Number missing: 0

Class: Numeric

Range: 6700  —  34,491,474

Standard Deviation: 357,555.6

 


 

Taxes Paid

Dataset: Payment History

Variable: TaxesPaidACS

Years: 2009-2014

Population: Residential properties with a building that had an assessment conducted during the year

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Real Estate Assessment Payment History Table  above

Number missing: 2,983

Class: Numeric

Range: --309,015.32  —  -97.58

Standard Deviation: 3107.71


 

Taxes Paid in Constant 2013 dollars

Dataset: Payment History

Variable: TaxesPaidACS.Constant2013

Years: 2009-2014

Population: Residential properties with a building that had an assessment conducted during the year

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Real Estate Assessment Payment History Table           above

Number missing: 2,983

Class: Numeric

Range:   -326,473.81  —  -97358

Standard Deviation: 3,190.20

 


 

Taxes Levied

Dataset: Payment History

Variable: TaxesLeviedACS

Years: 2009-2014

Population: Residential properties with a building that had an assessment conducted during the year

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Real Estate Assessment Payment History Table           above

Number missing: 64

Class: Numeric

Range:  97.58 –  329,041.78

Standard Deviation: 3,135.57

** 2% of payments do no not mach the amount levied

 


 

Taxes Levied in Constant 2013 Dollars

Dataset: Payment History

Variable: TaxesLeviedACS.Constant2013

Years: 2009-2014

Population: Residential properties with a building that had an assessment conducted during the year

Exclusion: Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked real estate tax questions)

N: See Real Estate Assessment Payment History Table           above

Number missing: 64

Class: Numeric

Range:  97.58 – 334,912.20

Standard Deviation: 37,785.96

 


 

 

Selling Amount  

Dataset: Sale

Variable: saleAmt

Year: 2009-2015

Population: Residential properties with a building that had an assessment conducted during the year

Exclusion:

  • Removed those classified as multifamily and unknown affordable dwelling. (Renters do not get asked value question);
  • Removed those that were not market value

N: See Real Estate Assessment Payment History Table           above

Number missing: 0

Class: Numeric

Range:  10,000   —  16,000,000

Standard Deviation: 382,123.8

 

 

Table of sale types:

1-Foreclosure, Auction, Bankru

2-Sale or Gift to Relative

3-Family Sale

8-Gov't Agencies Acquisition

A-Correction Deed

B-Not Previously Assessed

E-Estate Sale

773

3,202

147

10

2,182

102

445

G-New Construction

K-Financial Institution

O-Assignment of Lease

R-Relocation Sale/Holding Co.

S-Short Sale

Unknown Sale

W-Will / R.O.S.

132

645

111

105

267

14,159

1,635