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Boulder County, Colorado tax sale

Last checked Tue, Oct 27, 2026

Information only, not investment or legal advice. Sale dates, terms and deadlines change; always confirm with the county before you register or bid.

Upcoming sales

Date
Fri, Nov 13, 2026, 8:30 AM, Boulder County Courthouse, 1325 Pearl St., Third Floor (venue from the county FAQ)
Sale
2026 Tax Lien Sale
Deposit
None stated
Register by
In person on sale day from 7:30 AM; bring a signed IRS W-9
Source
https://bouldercounty.gov/property-and-land/treasurer/taxes/tax-lien-sale/

Sale details

Sale type
lien
Format
In person
How to bid
Register in person on sale day (registration opens at 7:30 a.m.) with your name, mailing address, Social Security or tax ID number and a signed IRS W-9. Bidding is open premium bidding, not rotational. The county says liens sold in 2026 earn 13% a year. It also lists an optional information briefing as 'Monday, Nov. 3' at 6 p.m.; Nov. 3, 2026 is a Tuesday and Election Day, so confirm before going.

County contact

Office
Boulder County Treasurer's Office
Phone
303-441-3520
Address
1325 Pearl St., Boulder, CO 80302
Website
https://bouldercounty.gov/property-and-land/treasurer/taxes/tax-lien-sale/

Sources

Source: Boulder County, Colorado official websites listed above. TaxAuctionLists is independent and is not affiliated with or endorsed by Boulder County.

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