Boulder County property records for 42 addresses on 21st Ave, Longmont, CO · Last verified October 2026
| Properties | 122 |
|---|---|
| Median Sale Price | $336,000 |
| Deeds and Mortgages on File | 146 |
| Median Price per Sqft | $269 |
| Owner Occupied | 50% |
| Median Annual Tax Bill | $2,005 |
| Median Year Built | 1996 |
| Median Ownership Tenure | 11 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
0.713 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $362,250Mar 2017 | $13,9382025 | Amount on Record — | Owner on Record | Assessor + 1 DocumentUpdated Jun 2026 |
3.43 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —May 2005 | Owner on Record Owner Occupied | AssessorUpdated Jun 2026 |
49 units · Built 1998 · 896 sq ft
| Last Sale | Median Tax Bill | Median Sale | ||
|---|---|---|---|---|
| $332,000Apr 2025 | $1,9442025 | $315,00049 units |
54 bd · 43.75 ba · 45,714 sqft · built 2001 · 2.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $7,225,000Sep 2020 | Amount on Record Aug 2001 | Owner on Record | Assessor + 5 DocumentsUpdated Jun 2026 |
3 units · Built 1958 · 1,681 sq ft
| Last Sale | Median Tax Bill | Median Sale | ||
|---|---|---|---|---|
| $415,000May 2023 | $650,0003 units |
1 bd · 1 ba · 4,240 sqft · built 1958 · 2.29 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jul 2004 | Owner on Record Owner Occupied | AssessorUpdated Jun 2026 |
2.49 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jan 1988 | Owner on Record Owner Occupied | AssessorUpdated Jun 2026 |
51 bd · 39.75 ba · 40,339 sqft · built 1999 · 1.13 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $203,722Oct 1998 | $45,3722025 | —Jan 2001 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Sep 2026 |
4 bd · 2 ba · 1,846 sqft · built 1972 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $79,500Aug 1991 | $2,9602025 | —Mar 2001 | 2 Owners on Record | Assessor + 1 DocumentUpdated Sep 2026 |
4 bd · 2 ba · 1,846 sqft · built 1972 · 0.173 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $409,000Jul 2023 | $3,3682025 | Amount on Record Jan 1983 | Owner on Record | Assessor + 3 DocumentsUpdated Oct 2026 |
4 bd · 2 ba · 1,846 sqft · built 1972 · 0.173 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $166,000Aug 1999 | $2,9092025 | Amount on Record Jun 1973 | 2 Owners on Record Owner Occupied | AssessorUpdated Sep 2026 |
5 bd · 3.25 ba · 2,630 sqft · built 1987 · 0.162 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $115,000Jul 1988 | $3,4782025 | Amount on Record Jul 1987 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Sep 2026 |
6 bd · 2 ba · 1,846 sqft · built 1972 · 0.173 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $506,000Apr 2022 | $3,1622025 | Amount on Record Jun 2009 | Owner on Record | Assessor + 2 DocumentsUpdated Sep 2026 |
6 bd · 2 ba · 1,846 sqft · built 1972 · 0.173 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $475,000Jul 2026 | $2,5412023 | Amount on Record Jun 2009 | Owner on Record | Assessor + 2 DocumentsUpdated Sep 2026 |
4 bd · 2 ba · 1,846 sqft · built 1972 · 0.177 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $336,000Nov 2021 | $3,1502025 | Amount on Record — | Owner on Record | Assessor + 2 DocumentsUpdated Sep 2026 |
3 bd · 2 ba · 1,846 sqft · built 1972 · 0.177 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $550,000Nov 2022 | $3,2112025 | Amount on Record Jun 1993 | Owner on Record | Assessor + 2 DocumentsUpdated Oct 2026 |
0.682 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record | Assessor + 1 DocumentUpdated Jun 2026 |
8.86 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $249,750Jul 2003 | Owner on Record Owner Occupied | AssessorUpdated Jun 2026 |
8 bd · 4 ba · 3,780 sqft · built 1979 · 0.183 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Mar 1987 | $5,5632025 | —Oct 1984 | Owner on Record | Assessor + 1 DocumentUpdated Sep 2026 |
8 bd · 6 ba · 3,960 sqft · built 1994 · 0.187 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 1992 | $6,2742025 | —Mar 1987 | Owner on Record | Assessor + 1 DocumentUpdated Sep 2026 |
8 bd · 4 ba · 3,689 sqft · built 1978 · 0.191 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $680,000Sep 2026 | $6,1732025 | Amount on Record Feb 2008 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2026 |
8 bd · 4 ba · 3,689 sqft · built 1978 · 0.183 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $875,000Sep 2025 | $6,0932025 | Amount on Record Oct 2019 | 2 Owners on Record | Assessor + 2 DocumentsUpdated Sep 2026 |
8 bd · 4 ba · 3,689 sqft · built 1978 · 0.182 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,100,000Aug 2019 | $7,5392025 | Amount on Record Apr 1993 | Owner on Record | Assessor + 1 DocumentUpdated Sep 2026 |
8 bd · 6 ba · 3,904 sqft · built 1985 · 0.183 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $450,000Jul 2014 | $7,1092025 | Amount on Record Oct 1985 | Owner on Record | Assessor + 2 DocumentsUpdated Sep 2026 |
8 bd · 4 ba · 3,689 sqft · built 1978 · 0.181 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $160,000Apr 1993 | $5,9792025 | Amount on Record Jul 1978 | Owner on Record | Assessor + 1 DocumentUpdated Sep 2026 |
8 bd · 4 ba · 3,689 sqft · built 1978 · 0.185 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $160,000Apr 1993 | $5,9802025 | Amount on Record Jun 1978 | Owner on Record | Assessor + 1 DocumentUpdated Sep 2026 |
7,577 sqft · built 1984 · 0.789 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,000,000Jul 2024 | $41,0072025 | Amount on Record Jan 2000 | Owner on Record | AssessorUpdated Jun 2026 |
20,664 sqft · built 1984 · 1.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,100,000Oct 2012 | $69,2162025 | Amount on Record Dec 1998 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
14,400 sqft · built 1995 · 1.43 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,500,000Feb 2015 | $81,6292025 | Amount on Record Jul 1995 | Owner on Record | Assessor + 3 DocumentsUpdated Sep 2026 |
3,360 sqft · built 1976 · 0.467 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $280,000Jun 2010 | $12,0412025 | Amount on Record Jun 1988 | Owner on Record | AssessorUpdated Jun 2026 |
7,421 sqft · built 1995 · 1.14 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $200,000Apr 1994 | $48,4292025 | —Mar 1978 | Owner on Record | AssessorUpdated Aug 2026 |
4 bd · 1.75 ba · 1,728 sqft · built 1979 · 0.171 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $147,500Aug 2011 | $2,9412025 | Amount on Record May 1979 | 2 Owners on Record Owner Occupied | AssessorUpdated Sep 2026 |
3 bd · 1.75 ba · 1,586 sqft · built 1983 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $177,500Sep 2006 | $2,9462025 | Amount on Record May 1999 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Sep 2026 |
2 bd · 1.75 ba · 1,590 sqft · built 1983 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $208,000Aug 2005 | $2,9182025 | Amount on Record Dec 1984 | Owner on Record Owner Occupied | AssessorUpdated Sep 2026 |
4 bd · 2.25 ba · 1,904 sqft · built 1978 · 0.151 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $327,000Nov 2017 | $3,2282025 | Amount on Record Jul 1993 | 2 Owners on Record | Assessor + 3 DocumentsUpdated Sep 2026 |
3 bd · 1.5 ba · 1,400 sqft · built 1998 · 0.151 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $133,000Oct 1998 | $3,0652025 | Amount on Record Apr 1998 | 2 Owners on Record Owner Occupied | AssessorUpdated Sep 2026 |
4 bd · 3.25 ba · 2,626 sqft · built 1996 · 0.151 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $219,000Mar 2001 | $3,7012025 | Amount on Record Apr 1997 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Sep 2026 |
4 bd · 2.5 ba · 2,109 sqft · built 1994 · 0.151 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $318,000Apr 2016 | $3,7472025 | Amount on Record Feb 2011 | 2 Owners on Record | AssessorUpdated Sep 2026 |
4 bd · 1.75 ba · 1,742 sqft · built 1983 · 0.174 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $300,000May 2017 | $3,3232025 | Amount on Record Jun 2008 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Sep 2026 |
16 units · Built 1996 · 1,172 sq ft
| Last Sale | Median Tax Bill | Median Sale | ||
|---|---|---|---|---|
| $385,000Feb 2023 | $2,2922025 | $312,00016 units |
16 units · Built 1984 · 1,050 sq ft
| Last Sale | Median Tax Bill | Median Sale | ||
|---|---|---|---|---|
| $3,600,000May 2020 | $1,7572025 | —16 units |
6.96 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 1983 | —Jun 1981 | Owner on Record Owner Occupied | AssessorUpdated Jun 2026 |