News and Information
Senior Exemption Applications
Senior Exemption Applications were accepted through July 15. Please visit the Senior Exemptions page to learn more.
Property Value Appeals for 2026
Business Personal Property Appeals were accepted June 15 through June 30, 2026
Real Property Value Appeals were accepted May 1 through June 8, 2026
On or before August 15, 2026, the Assessor’s Office will mail Notices of Determination to property owners who filed on-time appeals.
Property owners will have until September 15, 2026 to appeal their determination to the Board of Equalization.
Qualifying Veteran with a Disability Exemption and Gold Star Spouse Applications
Qualifying Veteran with a Disability and Gold Star Spouse Exemption Applications were accepted through July 1. Please visit the Veteran Related Exemptions web page to learn more.
Qualified Senior Primary Residence Applications
Qualified Senior Primary Residence Applications were accepted through March 15. Please visit the Senior Exemptions 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.
