Assessors Office

News & Information

News Releases

• Assessors Office to mail property value notices on May 1
• Metro Denver assessors announce real property valuations

Notices of Valuation mailed by May 1

The Boulder County Assessor’s Office has mailed Notices of Valuation to taxable property in Boulder County. Notices of Valuation were mailed on Friday, April 28.

These maps display:

• 24-Month Median Value Increases for 2023-2024 Reappraisal of Single Family Residences
• 2023-2024 Boulder County Residential Values
• 2023 Property Values, Taxes and Budgets

Real Property Value Appeals are accepted May 1 through June 8, 2023

How to Appeal Your Property Value

Overview

The Assessor’s Office establishes values every two years for more than 120,000 properties within Boulder County, worth more than $120 billion in market value, using tools such as geographic information systems (GIS) and mass appraisal techniques to perform the appraisal analysis. Property values are used to set tax amounts which the Treasurer’s Office administers and collects.

Connect With Us

• Assessor/Treasurer Change of Address form.
• View the Assessor A-Z guide.
• Ask a question about your Business Personal Property. Appeals are accepted June 15–30 each year.
• Ask a question about your Real Property. Appeals are accepted May 1–June 8 each year.
• Ask a question about your Senior Exemption. Applications must be filed by July 15.
• Search for your Notice of Value (NOV) online.
• 2020 Assessor’s Office State of the County video.