Assessor's Office

Notices of Value to be mailed May 1

The Boulder County Assessor’s Office has completed its biennial reappraisal of all property in Boulder County and will be mailing notices of value to property owners on Wednesday, May 1. For details and information, see: 2019 Reappraisal Announcement

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 must be filed no later than July 15 for the exemption to apply to your tax bill the following year.

• Senior Tax Exemption Qualifications, Amount, Forms, and Instructions

Business Personal Property

• Business Personal Property Overview
• About Business Personal Property Declarations
• Online filing will open January 26, 2019. (Available to businesses who received a postcard in lieu of a full declaration.) Deadline for filing declarations: April 15.
• Business Personal Property value appeals were accepted as on-time June 15 through July 2 this year.
  Ask a question about your business personal property.

Property Information, Mapping, & Data

Property Search

• Property Search
• Property Search Help

Property Data Download

• Downloadable Data Sets

Records Policies

• The Assessor’s Office policies reflect those of Boulder County, outlined in the Colorado Open Records Act (CORA).

Comparable Property Sales

• Current 2017/2018 Tax Year Base Period 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

• About your Notice of Determination
• Assessment Calendar

Ask a Question about Your Property

• Ask Business Personal Property a question.
  Appeals are accepted as on-time June 15 through June 30 each year.
• Ask a Real Property question.
  Appeals are accepted as on-time May 1 through June 1 each year.
  Search for your Notice of Value (NOV) online.

Learn more about:

• The Assessment Process
• Business Personal Property
• Agricultural Land
• Tax Exemptions for Seniors & Disabled Veterans
• Additional Resources