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.

Tax Lien Sale

2025 Sale Dates

Real Property Tax Lien Sale

Our tax lien sale will be held Friday, Nov. 14.
Registration begins at 7:30 a.m.
Sale begins at 8:30 a.m.
A list of properties advertised for sale and their current status is available and updated each Friday.

Tax Lien Sale Briefing

A briefing describing the tax lien sale process will be held for interested investors prior to the sale. This briefing is for information only, and attendance is not required.

Monday, Nov. 3
6 p.m.

Commissioners’ Hearing Room
1325 Pearl St Boulder
Third Floor

Mobile Home Tax Lien Sale

Our tax lien sale is announced for Dec. 5

As permitted under CRS 39-10-111.5, delinquent mobile home taxes will be struck off to the county rather than being offered for sale at auction.

Tax Lien Sale Information

For questions about parking, what information you’ll need to provide during registration, or anything else, please see our list of frequently asked questions.

Tax Lien Interest Rate

The interest rate for liens sold in 2025 is 14% per annum.

Prior Year Sale Information

Category11/20/202011/5/202111/16/202211/17/202311/8/2024
Interest rate9%9%12%15%15%
Investors at sale3742373229
Properties at auction522402446488591
Premium average5.2%7.5%7.6%7.0%6.0%
Taxes collected$2,741,829.48$2,918,713.39$2,470,112.64$2,329,830.56$3,800,832.11

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