Boulder County, Colorado

Tax Lien330,262 residents

County research last verified 2026-07. Office holders, platforms, and deposit rules change — re-confirm anything time-sensitive.

Sale typestate default

Tax Lien

Redemption periodstate default

3 years from sale

Investor returnstate default

9 points above federal discount rate, set annually; premium/bid-down format varies by county

Governing statutestate default

Colorado Revised Statutes Title 39, Art. 11

Notes

Colorado tax LIEN certificate sale. Boulder County Treasurer holds annual in-person tax lien sale at Boulder County Courthouse (1325 Pearl St., 3rd floor); CCTPTA lists Nov 13, 2026. Prior sale Nov 14, 2025 (14% interest). Registration opens 7:30 a.m. sale day; bidding after ~8:30 a.m. until inventory sold or 5 p.m. Lienholder after 3+ years may apply for Treasurer’s Deed auction of the property (post-HB24-1056 process).

Auction logistics

Format

In-person

Frequency

Annual mid-November (CCTPTA: Nov 13, 2026); Treasurer’s Deed auctions as applied for

Platform

Boulder County Treasurer — Tax Lien Sale ↗

Deposit rules

Register morning of sale with completed W-9; pay for liens per Treasurer instructions before leaving (confirm current payment media on FAQ). Advertising list published in newspaper of record ~4 weeks prior and online near sale. County employees/officials barred from purchasing.

Title risk

Liens that survive the sale

Lien purchase does not clear title — owner may redeem with statutory interest. Treasurer’s Deed path after three years can clear most private liens but federal/state liens can survive. Full public-records research required.

Quiet title

Treasurer’s deeds often need quiet title or extended title review before insurance/resale; certificate phase is investment only.

Deal maths for Colorado

Assessment ratio: 0.0705× of market value
Typical quiet title: $1,800–$5,000 · 5 mo
Recording and transfer: $250

Colorado assesses residential property at two rates since SB24-233. For school district purposes the 2026 residential rate is 7.05% of actual value; for local government purposes 6.95% is applied to actual value less the lesser of 10% of actual value or $70,000 as adjusted for inflation, an effective rate near 6.26% below $700,000. Commercial and agricultural property is 25% for 2026, down from 27% in 2025. This entry uses the school rate, the higher of the two residential figures.

Offices and records

Tax collector

Boulder County Treasurer ↗

303-441-3520

Clerk of court

Boulder County Clerk & Recorder ↗

Property appraiser

Boulder County Assessor ↗

GIS / parcel map

Boulder County Assessor property search / maps ↗

Areas trending up

Directional read from dated market analysis — not a guarantee, and not a substitute for your own comps.

City of Boulder / University Hill–downtown

CU and tech employment with extremely constrained supply

Longmont

Relative value and job growth versus Boulder core pricing

Superior / Louisville / East County

Suburban employment corridor between Boulder and Denver with strong SF demand