Property tax amounts for 2025 payable in 2026 will be available later in January, after we receive, review, and process the tax roll from the County Assessor.

Tax Lien Sale

2025 Sale Dates

Real Property Tax Lien Sale

Our tax lien sale was held Nov. 14, 2025.

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

Category	11/5/2021	11/16/2022	11/17/2023	11/8/2024	11/14/2025
Interest rate	9%	12%	15%	15%	14%
Investors at sale	42	37	32	29	25
Properties at auction	402	446	488	591	520
Premium average	7.5%	7.6%	7.0%	6.0%	5.6%
Taxes collected	$2,918,713.39	$2,470,112.64	$2,329,830.56	$3,800,832.11	$5,676,649.59

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

Hours: 8 a.m. - 4:30 p.m.
Tuesdays Only
Open Jan. 27 through Sep. 1, 2026