Boulder County government offices closed Thursday, Nov. 28, and Friday, Nov. 29, for the Thanksgiving holiday.

Change Mailing Address

Certified funds are required for all tax payments as of Oct 1. Online payment is no longer available. Our office in Lafayette is closed for the year; it will reopen in late January 2025.

Change Your Mailing Address

We’ve Changed How We Process Address Changes

We’ve worked with the Assessor and their partner, Just Appraised, to improve the way we process address changes. To enter an address change, you’ll need to register for an account, if you don’t already have one, and then log in, after confirming the e-mail address you entered during registration. Once you’ve logged in, look for the form called “Change of Address” and follow the instructions for completing it. Your change of address will be sent to both the Assessor and Treasurer.

Access the change of address form on Boulder County’s Just Appraised page.

Contact Us

Treasurer's Office

Phone: 303-441-3520
Fax: 303-441-3598

treasurer@bouldercounty.gov

eforeclosures@bouldercounty.gov

Mailing Address

PO Box 471
Boulder, CO 80306

Boulder

1325 Pearl St.
1st Floor
Map and Directions Boulder Location
Hours: 8 a.m. to 4:30 p.m.
Monday - Friday

Connect With Us

On Facebook:

Longmont

515 Coffman St.
Suite 113
Map and Directions Longmont Location
Hours: 8 a.m. to 4:30 p.m.
Mondays only

Lafayette

1755 S. Public Road
Map and Directions Lafayette Location
Office closed until late January 2025