If you have questions about property valuation and property tax, visit boco.org/2023Valuation.

Visit the Sheriff’s Office website for the outcome of the Marshall Fire investigation.

2011/2012 Residential Sales

Prior 2011/2012 Tax Years: Residential Sales

2011/2012 Tax Years: Comparable Sales

2011/2012 Tax Years: Non-Residential Sales

Base Period Sales from July 1, 2008–June 30, 2010

In areas with few sales, the Assessor is allowed to use comparable sales going back up to five years.

Single Family Residential Properties

Sales of single family homes, duplexes, and triplexes.

Market Area Maps for Single Family Properties

Comparable properties are often found in the same Market Area, which are groups of neighborhoods that have similar trends in the market. Boulder County uses these areas to establish market value for mass appraisal purposes.

Single Family Residences
Market Area 101 PDF XLSX
Market Area 102 PDF XLSX
Market Area 103 PDF XLSX
Market Area 104 PDF XLSX
Market Area 105 PDF XLSX
Market Area 106 PDF XLSX
Market Area 201 PDF XLSX
Market Area 301 PDF XLSX
Market Area 302 PDF XLSX
Market Area 303 PDF XLSX
Market Area 304 PDF XLSX
Market Area 401 PDF XLSX
Market Area 402 PDF XLSX
Market Area 403 PDF XLSX
Market Area 404 PDF XLSX
Market Area 405 PDF XLSX
Market Area 406 PDF XLSX
Market Area 407 PDF XLSX
Market Area 408 PDF XLSX
Market Area 501 PDF XLSX
Market Area 502 PDF XLSX
Market Area 503 PDF XLSX
Market Area 504 PDF XLSX
Market Area 505 PDF XLSX
Market Area 506 PDF XLSX

Condominiums

These sales are provided by market area.

Residential Condominiums
Market Area 30 –Typical Boulder Condos PDF XLSX
Market Area 31 – Boulder Urban and Downtown Condos PDF XLSX
Market Area 32 – Gunbarrel, Lafayette, Louisville, Nederland, and Superior Condos PDF XLSX
Market Area 33 – Erie and Longmont Condos PDF XLSX

Manufactured Housing

Manufactured homes are also referred to as Mobile Homes. See a more detailed definition.

Manufactured Housing PDF XLSX

Contact Us

Assessor
Phone: 303-441-3530
Fax: 303-441-4996

Email

Mailing Address
PO Box 471
Boulder, CO 80306-0471

*New as of Jan 4, 2021*
Monday thru Thursday
Hours: 7:30 am–5 pm
CLOSED Friday

Locations

Assessor Boulder & Longmont Drop Boxes

Boulder
1325 Pearl Street, 2nd floor
Boulder, CO 80302
Monday thru Thursday
Hours: 7:30 am–5 pm
Map & Directions

Longmont
515 Coffman Street, Suite 114
Monday ONLY
Hours: 7:30 am–5 pm
Map & Directions

Lafayette
1376 Miners Drive, Unit 105
Tuesday ONLY
Hours: 7:30 am–5 pm
Map & Directions