News and Information
Property Value Appeals for 2026
Real Property Value Appeals and Business Personal Property Appeals are no longer being accepted for 2026. Property owners who filed on-time appeals should have received their Notices of Determination.
Property owners will have until Sept. 15, 2026 to appeal their determination to the Board of Equalization.
Senior Exemption Applications
Senior Exemption Applications are closed for 2026. Applications will be accepted for the 2027 tax year starting Jan. 1, 2027. Please visit the Senior Exemptions page to learn more.
Qualifying Veteran with a Disability Exemption and Gold Star Spouse Applications
Qualifying Veteran with a Disability and Gold Star Spouse Exemption Applications are closed for 2026. Please visit the Veteran Related Exemptions web page to learn more.
Assessor Overview
Every two years, the Assessor’s Office reviews and sets the value of more than 120,000 properties in Boulder County. Together, these properties are worth more than $120 billion.
The office uses tools such as maps, property data, and mass appraisal methods to study property values. A property’s value helps determine its property taxes. The Treasurer’s Office sends tax bills and collects the payments.
Connect With Us
- Assessor/Treasurer Change of Address form.
- Ask a question about your Senior Exemption. Applications must be filed by July 15.
- Search for your Notice of Value (NOV) online.
