Change Mailing Address

Certified funds are now required for all delinquent tax payments. Online tax payments have been disabled for the remainder of the year. You may still view tax account information, including copies of receipts, online.

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

P.O. Box 471
Boulder, CO 80306

Boulder


1325 Pearl St.
Boulder, CO 80302
1st Floor

Hours: 8 a.m. - 4:30 p.m.
Monday - Friday

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Longmont


515 Coffman St.
Longmont, CO 80501
Suite 113

Hours: 8 a.m. - 4:30 p.m.
Mondays only

Lafayette


1755 S. Public Road
Lafayette, CO 80026

Office closed until late January 2026