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S 31st St, Boulder, CO Property Records

Boulder County property records for 23 addresses on S 31st St, Boulder, CO · Last verified August 2026

S 31st St Highlights

Properties 23
Median Sale Price $825,000
Deeds and Mortgages on File 34
Median Price per Sqft $604
Owner Occupied 74%
Median Annual Tax Bill $4,781
Median Year Built 1955
Median Ownership Tenure 15 years

Properties on S 31st St

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

10 S 31st St

2 bd · 1 ba · 988 sqft · 0.186 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Apr 2002 $4,3722025 Sale Amount Aug 2000 1 Name on Record Assessor + 2 DocumentsUpdated Jun 2026

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14 S 31st St

2 bd · 1.75 ba · 1,897 sqft · 0.171 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$190,000Apr 1996 $6,0322025 —Apr 1983 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

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15 S 31st St

3 bd · 1 ba · 960 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$400,000Jul 2014 $3,8802025 Sale Amount Mar 2010 2 Names on Record Assessor + 2 DocumentsUpdated Jun 2026

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18 S 31st St

4 bd · 3 ba · 2,147 sqft · 0.166 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$588,000Nov 2006 $7,9332025 Sale Amount Apr 2005 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

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22 S 31st St

3 bd · 2.5 ba · 2,520 sqft · 0.17 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$542,500Dec 2011 $6,9272025 Sale Amount Mar 2003 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

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30 S 31st St

3 bd · 1 ba · 960 sqft · 0.166 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$205,000Sep 2000 $4,1622025 —Oct 1987 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

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40 S 31st St

3 bd · 3.5 ba · 3,315 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$235,000Jun 1999 $8,0402025 Sale Amount Aug 1993 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

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50 S 31st St

3 bd · 1.75 ba · 1,505 sqft · 0.168 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$875,000Jul 2025 $5,4722025 Sale Amount Apr 1996 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

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60 S 31st St

3 bd · 1 ba · 1,026 sqft · 0.173 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$825,000Aug 2026 $4,7842025 Sale Amount Nov 2013 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

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70 S 31st St

4 bd · 3.25 ba · 2,743 sqft · 0.165 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,629,744Dec 2021 $8,0042025 Sale Amount Oct 2019 1 Name on Record Assessor + 3 DocumentsUpdated Jun 2026

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80 S 31st St

3 bd · 1 ba · 1,026 sqft · 0.169 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$620,000Jun 2025 $4,3252025 Sale Amount Aug 2001 1 Name on Record AssessorUpdated Jun 2026

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90 S 31st St

3 bd · 1 ba · 1,160 sqft · 0.166 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$640,000Aug 2019 $4,7472025 Sale Amount Jan 1996 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

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105 S 31st St

3 bd · 1 ba · 1,026 sqft · 0.19 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$345,000Aug 2006 $3,8252025 —Jul 2006 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

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110 S 31st St

3 bd · 1 ba · 1,767 sqft · 0.163 acres

Last Sale Tax Bill Prior Sale Owner Records
$152,500Feb 1996 $4,5202025 Sale Amount Jun 1994 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

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120 S 31st St

3 bd · 1 ba · 1,296 sqft · 0.169 acres

Last Sale Tax Bill Prior Sale Owner Records
$782,000Mar 2025 $4,4252025 Sale Amount Sep 1999 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

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125 S 31st St

3 bd · 1.75 ba · 1,296 sqft · 0.233 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$835,000May 2024 $5,2622025 Sale Amount May 2019 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

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130 S 31st St

3 bd · 1.5 ba · 1,026 sqft · 0.164 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$810,000Oct 2021 $5,3302025 Sale Amount Sep 2020 1 Name on Record Owner Occupied Assessor + 5 DocumentsUpdated Jun 2026

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140 S 31st St

3 bd · 1.5 ba · 1,521 sqft · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$66,500May 1980 $4,7812025 Sale Amount Oct 1975 2 Names on Record AssessorUpdated Jun 2026

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150 S 31st St

3 bd · 1.75 ba · 1,770 sqft · 0.182 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$114,500Dec 1992 $5,6342025 Sale Amount Jun 1986 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

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160 S 31st St

3 bd · 1.75 ba · 1,337 sqft · 0.238 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$346,000Apr 2007 $5,5882025 Sale Amount Mar 2007 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

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175 S 31st St

4 bd · 1 ba · 1,296 sqft · 0.181 acres

Last Sale Tax Bill Prior Sale Owner Records
$144,253Dec 1994 $3,9882025 —May 1989 1 Name on Record AssessorUpdated Jun 2026

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180 S 31st St

3 bd · 1.5 ba · 1,296 sqft · 0.244 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$367,000Jul 2023 $2,2592025 Sale Amount Nov 2022 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

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190 S 31st St

4 bd · 2 ba · 1,323 sqft · 0.21 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$486,900Jul 2014 $4,7302025 Sale Amount Mar 2008 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

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Property Records in Nearby Streets