Arapahoe County, Colorado

Tax Lien666,918 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 county (not a deed sale at auction). Arapahoe County Treasurer sells certificates of purchase for delinquent real-property taxes online via RealAuction. Winning bid is typically the highest premium above taxes due (second-price mechanics). 2025 tax lien sale scheduled online November 5, 2026. Statutory redemption interest for the 2025 sale cycle is 14% (nine points above the federal discount rate as of Sept 1). After ~3 years without redemption, lien holder may pursue a Treasurer's Deed via public auction option process — not automatic deed. All sales AS IS; county makes no marketability guarantee.

Auction logistics

Format

Online

Frequency

Annual online tax lien sale (2025 liens: November 5, 2026); files typically posted early–mid October

Platform

RealAuction — Arapahoe County Colorado Tax Sale ↗

Deposit rules

Register year-round on arapahoe.coloradotaxsale.com. Deposit 10% of intended investable bankroll via ACH (e.g. $800 deposit to bid up to $8,000 in liens). Unsuccessful deposits refunded ~2 weeks after sale. Winners pay remaining balance via ACH by 4:00 p.m. MST on the posted payment deadline or forfeit the winning bid (next highest may be awarded).

Title risk

Liens that survive the sale

A tax lien certificate is not ownership. On later Treasurer's Deed, federal tax liens can survive (IRS rights); research HOA, special district, and post-sale assessments. County disclaims warranties on condition/marketability.

Quiet title

After a Treasurer's Deed issues, title insurers commonly require quiet title or extended seasoning before insuring free-and-clear marketable title — budget legal process and time before resale.

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

Arapahoe County Treasurer — Tax Lien Sale ↗

303-795-4550

Clerk of court

Arapahoe County Clerk and Recorder (records deeds) ↗

Property appraiser

Arapahoe County Assessor — Property Search ↗

GIS / parcel map

Arapahoe County Assessor / GIS parcel resources ↗

Areas trending up

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

Centennial / Dove Valley

Employment and logistics corridor with strong Denver Tech Center adjacency supporting multifamily and industrial absorption into 2026

Aurora (Arapahoe portion) / Fitzsimons edge

Healthcare/biotech employment and relatively affordable housing demand versus central Denver

Highlands Ranch / southern suburbs

Established family buyer pool and school-driven demand with resilient resale liquidity versus outer exurban inventory