Some Boulder County services returned in-person on a limited basis beginning June 1. Most services are still being offered virtually.

Resources are available for those impacted by COVID-19. For help, submit questions or call 720-776-0822 weekdays (9 a.m.-5 p.m.).

Fire Restrictions were updated on June 2 and remain in effect for western Boulder County. View the flyer and map for more details.

2017/2018 Comparable Sales

Prior 2017/2018 Tax Years: Comparable Sales

Base Period Sales from July 1, 2014–June 30, 2016

These sales are used for the 2017/2018 tax years. Use the time-adjusted sales prices if appealing your property assessment.

Non-Residential Sales

Residential Sales

Time Trend Adjustments

Using Time Trending

Market Area

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. Your market area number is listed on your full-page Notice of Valuation (not the postcard) on the lower left side of the page below your property address and account number.

Contact Us

Due to COVID-19, all Assessors Office sites are closed for business until Sunday, May 31. Please call or email us with your questions during our normal business hours.

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

Business Personal Property
Phone: 303-441-3316
Fax: 303-441-1783

Email

Schedule a meeting

Mailing Address
Main: PO Box 471
Boulder, CO 80306-0471

Locations
Boulder
1325 Pearl St., 2nd floor
Boulder, CO 80302
Map & Directions
Hours: 8 a.m.-4:30 p.m. M-F

Longmont
515 Coffman Street, Suite 114
Map & Directions

Lafayette
1376 Miners Dr., Unit 105
Map & Directions