Dewey Ave, Boulder, CO Property Records

Boulder County property records for 55 addresses on Dewey Ave, Boulder, CO · Last verified August 2026

Dewey Ave Highlights

Properties 55
Median Sale Price $1,805,000
Deeds and Mortgages on File 82
Median Price per Sqft $813
Owner Occupied 64%
Median Annual Tax Bill $8,715
Median Year Built 1949
Median Ownership Tenure 11 years

Properties on Dewey Ave

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

330 Dewey Ave

3 bd · 3.25 ba · 2,494 sqft · 0.137 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,300,000Jul 2023 $21,3142025 Sale Amount Dec 2021 1 Name on Record Owner Occupied Assessor + 5 DocumentsUpdated Jun 2026

335 Dewey Ave

3 bd · 3 ba · 3,766 sqft · 0.136 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,900,000Jul 2020 $23,7702025 Sale Amount Oct 2017 1 Name on Record Assessor + 2 DocumentsUpdated Jun 2026

340 Dewey Ave

2 bd · 2.75 ba · 3,390 sqft · 0.139 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$775,000Jan 2016 $23,3392025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

345 Dewey Ave

4 bd · 3.75 ba · 4,212 sqft · 0.136 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,425,000Oct 2020 $24,8052025 Sale Amount Mar 2014 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

403 Dewey Ave

5 bd · 3 ba · 3,268 sqft · 0.134 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,375,000Jul 2024 $12,8132025 Sale Amount May 1999 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

410 Dewey Ave

4 bd · 3.25 ba · 4,267 sqft · 0.233 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,583,000Jul 2014 $18,2982025 Sale Amount Aug 2004 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

417 Dewey Ave

4 bd · 3.25 ba · 3,184 sqft · 0.263 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,700,000Nov 2022 $16,3792025 Sale Amount Jan 2015 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

424 Dewey Ave

3 bd · 1 ba · 950 sqft · 0.115 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$825,000Sep 2018 $6,1202025 Sale Amount Feb 1994 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

429 Dewey Ave

3 bd · 2.25 ba · 2,405 sqft · 0.188 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$880,000Jun 2017 $16,3272025 Sale Amount Dec 2002 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

430 Dewey Ave

2 bd · 1.5 ba · 1,174 sqft · 0.114 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$213,500Jul 1997 $6,0542025 Sale Amount Mar 1991 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

431 Dewey Ave

4 bd · 2 ba · 1,248 sqft · 0.146 acres

Last Sale Tax Bill Prior Sale Owner Records
$750,000May 2019 $7,4882025 —Nov 1986 1 Name on Record Assessor + 3 DocumentsUpdated Aug 2026

434 Dewey Ave

6 bd · 4.75 ba · 4,864 sqft · 0.239 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,495,000Oct 2023 $23,1812025 Sale Amount Jun 2015 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

435 Dewey Ave

2 bd · 1.5 ba · 1,560 sqft · 0.187 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$110,000Nov 1990 $6,3162025 Sale Amount May 1974 1 Name on Record Owner Occupied AssessorUpdated Jun 2026

445 Dewey Ave

4 bd · 2.5 ba · 1,338 sqft · 0.145 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$855,000Aug 2019 $7,8572025 Sale Amount Feb 2018 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

503 Dewey Ave

4 bd · 4.5 ba · 3,933 sqft · 0.17 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,400,000May 2016 $15,4162025 Sale Amount Nov 2005 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

512 Dewey Ave

3 bd · 4.25 ba · 2,440 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$89,000Apr 1989 $11,8882025 —Apr 1987 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

513 Dewey Ave

4 bd · 2 ba · 1,904 sqft · 0.143 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$459,900Jul 2004 $7,7602025 —Jul 1991 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

518 Dewey Ave

3 bd · 2 ba · 3,872 sqft · 0.147 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,200,000Mar 2013 $13,7672025 Sale Amount Nov 2011 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

521 Dewey Ave

3 bd · 3 ba · 1,756 sqft · 0.149 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,130,000Jan 2017 $11,7472025 Sale Amount Aug 2005 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

528 Dewey Ave

2 bd · 1 ba · 700 sqft · 0.15 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$500,000Mar 2013 $6,4882025 Sale Amount Apr 2012 2 Names on Record AssessorUpdated Jun 2026

534 Dewey Ave

3 bd · 1 ba · 920 sqft · 0.147 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$70,000Jul 1980 $6,4052025 Sale Amount May 1965 2 Names on Record Assessor + 1 DocumentUpdated Jun 2026

535 Dewey Ave

4 bd · 2 ba · 1,911 sqft · 0.143 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,295,000Mar 2025 $9,5212025 Sale Amount Sep 2010 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

537 Dewey Ave

4 bd · 2 ba · 1,960 sqft · 0.157 acres

Last Sale Tax Bill Prior Sale Owner Records
$930,000May 2017 $8,0672025 Sale Amount Mar 1991 1 Name on Record Assessor + 1 DocumentUpdated Jun 2026

538 Dewey Ave

3 bd · 2.25 ba · 1,775 sqft · 0.147 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$395,000Apr 2000 $4,0402025 Sale Amount Apr 1991 1 Name on Record Owner Occupied AssessorUpdated Jun 2026

540 Dewey Ave

3 bd · 2.75 ba · 3,292 sqft · 0.151 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$500,000Jan 2015 $13,8082025 —Jul 1991 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jun 2026

543 Dewey Ave, #A

1 bd · 1.75 ba · 3,043 sqft · 0.234 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$535,000Jun 2012 $14,3802025 Sale Amount Feb 2012 2 Names on Record Owner Occupied Assessor + 6 DocumentsUpdated Aug 2026

603 Dewey Ave

4 bd · 2 ba · 1,913 sqft · 0.254 acres

Last Sale Tax Bill Prior Sale Owner Records
—Jul 1975 $8,9692025 —Aug 2011 1 Name on Record AssessorUpdated Jun 2026

606 Dewey Ave

3 bd · 1.5 ba · 1,516 sqft · 0.116 acres

Last Sale Tax Bill Prior Sale Owner Records
$480,000Nov 2005 $9,4212025 Sale Amount Oct 2000 1 Name on Record AssessorUpdated Jun 2026

610 Dewey Ave

2 bd · 1 ba · 1,093 sqft · 0.113 acres

Last Sale Tax Bill Prior Sale Owner Records
$900,000Jun 2018 $7,8302025 Sale Amount Apr 1997 2 Names on Record Assessor + 1 DocumentUpdated Jun 2026

611 Dewey Ave

6 bd · 4 ba · 2,806 sqft · 0.142 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$485,000Jan 2005 $11,2242025 Sale Amount Nov 1985 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

615 Dewey Ave

4 bd · 2 ba · 1,872 sqft · 0.144 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$975,000Aug 2016 $8,7152025 Sale Amount Sep 2005 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

616 Dewey Ave

2 bd · 1 ba · 1,388 sqft · 0.114 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,200,000May 2026 $6,4082025 Sale Amount Apr 1990 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

620 Dewey Ave

2 bd · 1.75 ba · 2,208 sqft · 0.098 acres

Last Sale Tax Bill Prior Sale Owner Records
$579,000Jul 2008 $9,9682025 Sale Amount May 1987 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

625 Dewey Ave

2 bd · 2 ba · 1,527 sqft · 0.077 acres

Last Sale Tax Bill Prior Sale Owner Records
$345,000Oct 1999 $7,1332025 —Jul 1989 1 Name on Record Owner Occupied AssessorUpdated Jun 2026

629 Dewey Ave

3 bd · 3.25 ba · 1,536 sqft · 0.065 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,180,000Aug 2020 $9,0322025 Sale Amount Jun 1996 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

632 Dewey Ave

2 bd · 1.75 ba · 1,382 sqft · 0.059 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,410,000Jun 2021 $8,2602025 Sale Amount May 2017 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jun 2026

635 Dewey Ave

3 bd · 2.25 ba · 2,104 sqft · 0.081 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$715,000May 2013 $9,4112025 Sale Amount Oct 2007 2 Names on Record AssessorUpdated Aug 2026

636 Dewey Ave

3 bd · 3 ba · 1,617 sqft · 0.076 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$161,500Dec 1995 $9,6942025 Sale Amount Sep 1989 1 Name on Record Owner Occupied AssessorUpdated Jun 2026

640 Dewey Ave

2 bd · 1.75 ba · 1,628 sqft · 0.064 acres

Last Sale Tax Bill Prior Sale Owner Records
$237,500Mar 1995 $8,4992025 Sale Amount Jul 1981 2 Names on Record Owner Occupied AssessorUpdated Jun 2026

644 Dewey Ave

3 bd · 1.75 ba · 1,694 sqft · 0.066 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,435,500Jun 2025 $7,1632025 Sale Amount Jul 2011 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

645 Dewey Ave

4 bd · 2 ba · 1,682 sqft · 0.195 acres

Last Sale Tax Bill Prior Sale Owner Records
—Jul 1984 $8,2812025 —Jul 1961 1 Name on Record AssessorUpdated Jun 2026

648 Dewey Ave

1 bd · 1 ba · 720 sqft · 0.076 acres

Last Sale Tax Bill Prior Sale Owner Records
$860,000Sep 2021 $5,6952025 Sale Amount Aug 2016 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jun 2026

652 Dewey Ave

2 bd · 1 ba · 1,144 sqft · 0.073 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$662,000Oct 2008 $6,2282025 —May 1989 1 Name on Record AssessorUpdated Jun 2026

653 Dewey Ave

3 bd · 1.75 ba · 1,288 sqft · 0.141 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,600,000Jun 2026 $7,8762025 Sale Amount Jul 2020 2 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Jun 2026

801 Dewey Ave

1 bd · 1.5 ba · 318 sqft · 0.065 acres

Last Sale Tax Bill Prior Sale Owner Records
$60,000Aug 1984 $5,7942025 Sale Amount Nov 1980 1 Name on Record AssessorUpdated Jun 2026

801 Dewey Ave, Unit A

2 bd · 2 ba · 1,316 sqft · 0.113 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$96,000Jun 1990 $5,8522025 —Aug 1984 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

801 Dewey Ave, Unit B

2 bd · 2.25 ba · 1,658 sqft · 0 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$96,000Jun 1990 $6,1802025 —Aug 1984 1 Name on Record Assessor + 1 DocumentUpdated Jun 2026

804 Dewey Ave

3 bd · 3.5 ba · 2,224 sqft · 0.105 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,675,000Jun 2026 $11,3202025 Sale Amount Apr 2013 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

805 Dewey Ave

3 bd · 3.5 ba · 2,674 sqft · 0.1 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,805,000Apr 2021 $11,3672025 Sale Amount Aug 2014 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

812 Dewey Ave

2 bd · 1.5 ba · 768 sqft · 0.098 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$88,000Jan 1986 $6,1722025 —Jan 1986 1 Name on Record AssessorUpdated Jun 2026

815 Dewey Ave

9 bd · 6.5 ba · 6,320 sqft · 0.281 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,050,000Dec 2023 $12,1272025 —Jun 1992 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

825 Dewey Ave

5 bd · 3 ba · 2,106 sqft · 0.139 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$699,000Oct 2011 $9,5472025 Sale Amount Sep 1993 1 Name on Record Assessor + 1 DocumentUpdated Jun 2026

830 Dewey Ave

2 bd · 1 ba · 975 sqft · 0.057 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$355,000Jun 2009 $5,7762025 —Jan 1989 2 Names on Record AssessorUpdated Jun 2026

834 Dewey Ave

2 bd · 1.5 ba · 1,223 sqft · 0.057 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$738,000Mar 2019 $6,7402025 Sale Amount Nov 2014 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jun 2026

836 Dewey Ave

2 bd · 1 ba · 704 sqft · 0.086 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$112,000Sep 1991 $5,5382025 Sale Amount May 1985 1 Name on Record AssessorUpdated Jun 2026

Property Records in Nearby Streets