BoCo Alert System

Level 1 Fire Restrictions in effect for western Boulder County (more). See flyer and map for details.

Assessor’s Office

Assessor's Office

Property owners who have appealed their 2018 property value, please note:
The Assessor’s Office will mail Notices of Determination on or before the statutory deadline of August 31.

Business Personal Property

Property Information, Mapping, & Data

Property Search

Property Data Download

Records Policies

Comparable Property Sales

Recent Sales

  • Recent Sales Activity—lists of sales for specified time frames. These lists are not intended to be used for real property assessment appeals.

Real Property Value Appeals were accepted May 1 through June 1, 2018

The Assessor’s Office will mail Notices of Determination to property owners who filed on-time appeals at the end of August, 2018. Property owners will have until September 15, 2018 to appeal their determination to the Board of Equalization.

Valuation Appeals—Notice of Determination

Ask a Question about Your Property

Senior Tax Exemption

The Colorado Constitution establishes a property tax exemption for qualifying senior citizens, surviving spouses of senior citizens who previously qualified, and for disabled veterans.

Applications are accepted January 1 through July 15 of each year.

Learn more about:

Assessor Logo

Cynthia Braddock, Assessor
Cynthia Braddock
Meet the Assessor

Valuing Property

The Assessor’s Office establishes values every two years for more than 120,000 properties, worth nearly $50 billion in market value. The agency uses tools such as geographic information systems (GIS) and mass appraisal techniques to perform appraisal analysis.

The Assessor discovers and lists information about properties and uses this information to determine property values.

Property Assessment Overview

How Property Taxes Are Calculated

Contact Us


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

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

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



1325 Pearl St., 2nd floor
Boulder, CO 80302
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