Boulder County government offices are closed Wednesday, June 19, in observance of Juneteenth. Primary Elections Vote Center locations are open.

Mill Levies & Taxing Districts

Mill Levies & Taxing Districts

Local Government Budget Process

Each year county commissioners, city councils, school boards, and special districts hold budget hearings to determine how many dollars will be needed for the following year’s operations. These hearings are usually held in September or October but may be held earlier. Check your local newspaper for the hearing dates. (See Budget & Finance for more information.)

Each taxing entity determines what revenues will be required to operate the entity during the coming fiscal year. The required revenues are then divided by the total assessed value to determine the tax rate/mill levy per entity.

Generally, properties are affected by several taxing entities. To determine the Tax Area for a specific property, please refer to the Assessment tab on Boulder County’s Property Search application.

Assessment Abstracts

Annual report showing the total assessed valuation for Boulder County

Certification of Values to Taxing Entities

Each year, taxing entities are required to develop a budget for the upcoming year.

Mill Levy Changes

Detailed lists of changes in mill levies from year to year.

Property Tax Bills

For exact property taxes due, please refer to the Boulder County Treasurer’s website or contact the Boulder County Treasurer at (303) 441-3520.

Contact Us

Assessor

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

Email

Mailing Address

PO Box 471
Boulder, CO 80306-0471

Hours: 7:30 a.m. to 5 p.m.
Monday-Thursday
Closed Friday

Locations

Assessor Boulder and Longmont Drop Boxes

Boulder

1325 Pearl St., 2nd floor
Boulder, CO 80302
Hours: 7:30 a.m. to 5 p.m.
Monday-Thursday
Map and Directions Boulder Location

Longmont

515 Coffman St., Suite 114
Hours: 7:30 a.m. to 5 p.m.
Monday only
Map and Directions Longmont Location

Lafayette

1755 S Public Road
Hours: 7:30 a.m. to 5 p.m.
Tuesday only
Map and Directions Lafayette Location