Boulder County property records for 57 addresses on Union Ave, Boulder, CO · Last verified August 2026
| Properties | 57 |
|---|---|
| Median Sale Price | $1,800,000 |
| Deeds and Mortgages on File | 91 |
| Median Price per Sqft | $608 |
| Owner Occupied | 67% |
| Median Annual Tax Bill | $8,292 |
| Median Year Built | 1989 |
| Median Ownership Tenure | 11 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 2.5 ba · 1,123 sqft · 0.185 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $370,000May 2006 | $3,6932025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 3.25 ba · 1,620 sqft · 0 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $830,000May 2018 | $4,6212025 | Sale Amount Apr 2009 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 2.5 ba · 1,633 sqft · 0.19 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $439,900Apr 2012 | $4,0082025 | Sale Amount Jan 2006 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 3.5 ba · 1,620 sqft · 0 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $538,000May 2014 | $4,8802025 | Sale Amount Feb 2006 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
5 bd · 3.5 ba · 2,948 sqft · 0.304 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,349,000Jul 2017 | $13,7512025 | Sale Amount Dec 2007 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
4 bd · 2.75 ba · 2,194 sqft · 0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,144,000Aug 2025 | $8,2922025 | Sale Amount Jul 2024 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
3 bd · 1 ba · 1,200 sqft · 0.208 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $430,000Apr 2006 | $5,3192025 | —Apr 2006 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
5 bd · 4 ba · 5,110 sqft · 0.27 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,370,000Mar 2019 | $17,6182025 | Sale Amount Jul 2012 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jun 2026 |
3 bd · 1.75 ba · 1,318 sqft · 0.243 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $105,000Jun 1993 | $5,4972025 | —Oct 1986 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
4 bd · 2.75 ba · 2,644 sqft · 0.27 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $685,000Mar 2012 | $9,2692025 | Sale Amount May 1993 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 3.5 ba · 4,351 sqft · 0.159 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,015,000May 2021 | $13,2892025 | Sale Amount Oct 2012 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
4 bd · 3.5 ba · 4,402 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,890,000Jun 2020 | $13,7062025 | Sale Amount May 2014 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
5 bd · 3.25 ba · 4,210 sqft · 0.212 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $780,000Apr 2019 | $8,1502025 | Sale Amount Sep 2005 | 2 Names on Record | Assessor + 4 DocumentsUpdated Aug 2026 |
3 bd · 2 ba · 1,536 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,101,000Jul 2025 | $6,7432025 | Sale Amount Mar 2018 | 1 Name on Record | Assessor + 3 DocumentsUpdated Jun 2026 |
2 bd · 1.5 ba · 1,432 sqft · 0.179 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $451,000Dec 2004 | $7,4712025 | Sale Amount Jul 2002 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
5 bd · 4.75 ba · 3,840 sqft · 0.169 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $960,000Oct 2017 | $13,0422025 | —Aug 2020 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
4 bd · 2.75 ba · 3,220 sqft · 0.144 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $836,098Feb 2011 | $13,1332025 | Sale Amount Apr 2009 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jun 2026 |
5 bd · 4 ba · 4,516 sqft · 0.169 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,165,000Jun 2022 | $13,7992025 | Sale Amount Jun 2020 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Aug 2026 |
5 bd · 3.5 ba · 3,453 sqft · 0.165 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,075,000Jun 2015 | $11,6592025 | Sale Amount Feb 2014 | 2 Names on Record | AssessorUpdated Jun 2026 |
6 bd · 5 ba · 5,020 sqft · 0.176 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,800,000Mar 2020 | $16,6852025 | —Mar 2020 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
4 bd · 3 ba · 3,822 sqft · 0.169 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 2020 | $11,4292025 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 4.25 ba · 3,112 sqft · 0.169 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,800,000Nov 2021 | $12,0132025 | —Nov 2021 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
6 bd · 3.5 ba · 2,328 sqft · 0.165 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,500,000Jun 2024 | $3,8702025 | —Apr 1990 | 1 Name on Record | Assessor + 3 DocumentsUpdated Jun 2026 |
5 bd · 3.75 ba · 3,840 sqft · 0.147 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,325,000Nov 2015 | $13,5512025 | Sale Amount Apr 2002 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
5 bd · 3.75 ba · 4,687 sqft · 0.165 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,035,000Aug 2005 | $14,6432025 | Sale Amount Dec 1987 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
0.165 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,8702025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.75 ba · 1,576 sqft · 0.162 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $225,200Jan 1993 | $8,7442025 | —Sep 1992 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 2 ba · 1,440 sqft · 0.168 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $307,500Aug 1998 | $9,3582025 | Sale Amount Jul 1989 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
4 bd · 2.75 ba · 3,494 sqft · 0.167 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $203,600Oct 1990 | $8,8132025 | —May 1989 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 3.5 ba · 4,164 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $12,3302025 | —Aug 2013 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 2.75 ba · 3,608 sqft · 0.16 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $675,000May 2000 | $11,6402025 | Sale Amount May 1999 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
6 bd · 4.25 ba · 4,301 sqft · 0.16 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,850,000Jun 2020 | $13,0822025 | —Apr 2020 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
4 bd · 3.25 ba · 2,266 sqft · 0.162 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,016,500Feb 2013 | $11,3512025 | Sale Amount Dec 2010 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 2 ba · 1,776 sqft · 0.328 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 1986 | $7,1252025 | —Jan 1985 | 2 Names on Record | AssessorUpdated Aug 2026 |
3 bd · 2.5 ba · 3,444 sqft · 0.16 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,340,000Feb 2015 | $14,9562025 | Sale Amount Aug 2012 | 1 Name on Record | AssessorUpdated Jun 2026 |
3 bd · 1.5 ba · 2,360 sqft · 0.332 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $94,000Oct 1987 | $8,1932025 | —Oct 1987 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 2.5 ba · 2,570 sqft · 0.241 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,500,000Oct 2015 | $15,8822025 | Sale Amount Aug 2015 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5202025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
5 bd · 3.25 ba · 3,064 sqft · 0.241 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,575,000May 2023 | $11,8472025 | Sale Amount May 2012 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
3 bd · 3.25 ba · 2,395 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,456,825Jul 2021 | $10,0312025 | Sale Amount May 2016 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
0.179 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6582025 | 1 Name on Record | AssessorUpdated Jun 2026 |
4 bd · 4 ba · 3,818 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $692,000Aug 2002 | $11,8622025 | Sale Amount Jun 2001 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 2 ba · 1,458 sqft · 0.16 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $915,000May 2021 | $6,5942025 | Sale Amount Mar 2019 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
0.132 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4872025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
0.145 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5122025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 3 ba · 2,273 sqft · 0.669 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,425,000Jul 2007 | 1 Name on Record | AssessorUpdated Mar 2024 |
0.166 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5482025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 2.5 ba · 2,823 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,200,000Nov 2022 | $8,9822025 | Sale Amount Feb 2016 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
0.132 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4872025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 2 ba · 1,849 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $144,900Jul 1996 | $7,6952025 | Sale Amount Apr 1993 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
3 bd · 1.75 ba · 1,888 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,230,800Mar 2019 | $8,1772025 | Sale Amount Oct 2018 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jun 2026 |
3 bd · 2 ba · 1,536 sqft · 0.161 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $209,000Apr 1997 | $6,3942025 | Sale Amount Aug 1986 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
0.145 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5122025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
0.166 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6322025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
0.145 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5122025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
0.132 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4882025 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
10,157 sqft · Built 1970 · 2.97 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —May 1999 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Mar 2024 |