Boulder County property records for 52 addresses on 21st St, Boulder, CO · Last verified August 2026
| Properties | 56 |
|---|---|
| Median Sale Price | $2,000,000 |
| Deeds and Mortgages on File | 66 |
| Median Price per Sqft | $720 |
| Owner Occupied | 68% |
| Median Annual Tax Bill | $8,026 |
| Median Year Built | 1956 |
| Median Ownership Tenure | 20 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 2.5 ba · 2,359 sqft · 0.207 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Dec 1989 | $8,8462025 | Sale Amount Jul 1989 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.75 ba · 2,095 sqft · 0.195 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,166,400Dec 2018 | $8,9512025 | Sale Amount Jun 2007 | 2 Names on Record | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1.5 ba · 1,218 sqft · 0.231 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Nov 1987 | $6,9032025 | Sale Amount Aug 1985 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 1,001 sqft · 0.183 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —May 1979 | $5,8692025 | Sale Amount Aug 1978 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 2.75 ba · 2,575 sqft · 0.209 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $487,000Aug 2002 | $8,8872025 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1.75 ba · 1,084 sqft · 0.157 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $22,200Nov 1980 | $7,0592025 | Sale Amount Jul 1973 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
2 bd · 2.75 ba · 1,272 sqft · 0.052 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $515,000Mar 2014 | $6,1742025 | Sale Amount Oct 1991 | 1 Name on Record | AssessorUpdated Jun 2026 |
21 bd · 21 ba · 5,831 sqft · 0.464 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jun 1985 | —Feb 1981 | 1 Name on Record | AssessorUpdated Jul 2026 |
6 bd · 4.75 ba · 3,357 sqft · 0.176 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Aug 1959 | $12,6072025 | —Aug 2002 | 1 Name on Record | AssessorUpdated Jun 2026 |
2 bd · 3.5 ba · 1,821 sqft · 0 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4,100,000Aug 2022 | $8,8412025 | Sale Amount May 2014 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 2.25 ba · 1,727 sqft · 0 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,425,000Oct 2019 | $9,8412025 | Sale Amount Apr 2014 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
5 units · Built 2014 · 1,328 sq ft
| Last Sale | Median Tax Bill | Median Sale | ||
|---|---|---|---|---|
| $1,215,000Apr 2021 | $8,2812025 | $825,0005 units |
4 bd · 1.5 ba · 2,260 sqft · 1.15 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $126,000Nov 1990 | $4,2162025 | —May 1987 | 2 Names on Record | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 2 ba · 1,856 sqft · 0.162 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $105,300Jan 1987 | $8,3812025 | —Apr 1985 | 1 Name on Record | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 1,613 sqft · 0.074 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $308,000Jun 1995 | $8,0262025 | —Dec 1981 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 2.25 ba · 2,083 sqft · 0.093 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $879,000Jun 2014 | $9,0282025 | —Jun 2014 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 1 ba · 940 sqft · 0.063 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $68,500Aug 1984 | $5,0622025 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.75 ba · 1,740 sqft · 0.07 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $740,000Mar 2009 | $9,4372025 | Sale Amount Jun 2006 | 2 Names on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 2.75 ba · 2,186 sqft · 0.167 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $130,000Dec 1995 | $9,4342025 | —Mar 1964 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 2 ba · 2,054 sqft · 0.102 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $686,000Jul 2005 | $10,3942025 | Sale Amount Jan 2002 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 2.25 ba · 2,168 sqft · 0.19 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $632,500Apr 2013 | $7,6712025 | Sale Amount Jan 1985 | 2 Names on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,359 sqft · 0.209 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $164,000Sep 1993 | $4,6322025 | —Sep 1993 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 1,629 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $344,000Jan 2011 | $7,2252025 | —Dec 2010 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 1.75 ba · 1,859 sqft · 0.249 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $215,000Oct 1995 | $6,4362025 | Sale Amount Oct 1993 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 2.75 ba · 2,514 sqft · 0.212 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $965,000Jun 2016 | $8,4232025 | Sale Amount Mar 2001 | 2 Names on Record | AssessorUpdated Aug 2026 |
2 bd · 1.5 ba · 1,175 sqft · 0.211 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $178,700May 1997 | $5,6302025 | —Jun 1993 | 1 Name on Record | AssessorUpdated Jun 2026 |
3 bd · 1.75 ba · 1,175 sqft · 0.189 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $807,500Mar 2019 | $6,6132025 | Sale Amount Sep 2017 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
2 bd · 1.5 ba · 1,395 sqft · 0.19 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $875,000Jun 2023 | $5,7072025 | Sale Amount May 1998 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1.5 ba · 1,195 sqft · 0.184 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $93,500Jul 1990 | $5,5802025 | —Nov 1982 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 1,303 sqft · 0.193 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $90,500Oct 1985 | $4,8292025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 3 ba · 2,082 sqft · 0.185 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $600,000Feb 2012 | $7,4132025 | Sale Amount May 1991 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 3 ba · 3,220 sqft · 0.196 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $90,000Aug 1984 | $8,8792025 | —Apr 2011 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.5 ba · 1,535 sqft · 0.188 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $36,500Jun 1973 | $5,8402025 | —May 2005 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
4 bd · 1.5 ba · 1,375 sqft · 0.171 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,025,000Jul 2022 | $6,4042025 | Sale Amount Jul 2008 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1 ba · 1,050 sqft · 0.178 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $195,000Aug 1998 | $5,6462025 | Sale Amount Aug 1993 | 1 Name on Record | AssessorUpdated Jun 2026 |
3 bd · 1.75 ba · 2,690 sqft · 0.176 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $444,900Aug 2005 | $10,3182025 | Sale Amount May 2002 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Aug 2026 |
3 bd · 2.5 ba · 2,387 sqft · 0.192 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $255,000Sep 1998 | $6,4522025 | Sale Amount Apr 1997 | 2 Names on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,050 sqft · 0.171 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $180,000Aug 1997 | $5,2232025 | —Jul 1991 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
5 bd · 5.25 ba · 4,389 sqft · 0.202 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $840,000Aug 2023 | $6,6562025 | Sale Amount Jul 1983 | 2 Names on Record | Assessor + 4 DocumentsUpdated Aug 2026 |
3 bd · 1.75 ba · 1,053 sqft · 0.179 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $415,000Feb 2008 | $5,5812025 | Sale Amount Apr 2002 | 1 Name on Record | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 1,075 sqft · 0.21 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $83,600Nov 1987 | $4,6502025 | Sale Amount Aug 1987 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 2.75 ba · 2,775 sqft · 0.167 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,000,000Jul 2025 | $12,1132025 | Sale Amount Jul 2014 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
5 bd · 2.75 ba · 2,607 sqft · 0.163 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Oct 1997 | $9,2662025 | —Oct 1997 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1.5 ba · 1,475 sqft · 0.218 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $167,500Dec 1993 | $4,4172025 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
4 bd · 2 ba · 1,375 sqft · 0.263 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Sep 1986 | $5,9622025 | —Apr 1980 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 4.25 ba · 7,105 sqft · 0.658 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,409,000Feb 2020 | $56,4442025 | Sale Amount Apr 2007 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
5 bd · 4 ba · 5,733 sqft · 0.778 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,514,000Aug 2007 | $17,0802025 | Sale Amount Apr 1987 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 4.25 ba · 4,702 sqft · 0.791 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $950,000Apr 2006 | $21,7532025 | Sale Amount Aug 1999 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
5 bd · 4.25 ba · 6,555 sqft · 0.772 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,743,000Apr 2011 | $21,8162025 | Sale Amount Feb 2006 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
7 bd · 4.25 ba · 6,785 sqft · 0.81 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4,500,000Jan 2022 | $29,6412025 | Sale Amount Sep 2017 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
4 bd · 5.25 ba · 7,666 sqft · 0.684 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $4,200,000Feb 2021 | $39,5792025 | Sale Amount Oct 2013 | 2 Names on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 1,054 sqft · 0.339 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $413,500Sep 2008 | $5,6112025 | 2 Names on Record | AssessorUpdated Jun 2026 |