Delinquent Taxes and Tax Lien Sale

Beginning in early to mid-October, this year’s Tax Lien Sale Files will be available to view.

For Property Owners


The next online sale of Arapahoe County delinquent tax liens will be held in November, 2021.

Please note that delinquent real estate tax payments must be received in the Treasurer's Office by Noon MST the day prior to commencement of bidding and will not be accepted after that time without redemption interest. Cleared funds (cash, cashier’s check, certified check, or money order) are required for tax payments made after September 30. 

Parcels with unpaid amortized special assessment installments at time of tax lien sale will have all future installments brought forward and become due. 

After the tax lien sale has concluded, payments are considered tax lien redemptions and must be paid with cash or cleared funds. If you are not the owner and plan to redeem a tax lien on behalf of the owner, a Redemption Affidavit will be required at time of payment. Click here to fill out and print the affidavit. 

For Tax Lien Buyers (Bidders)


The 2021 Tax Lien Sale will be held online in November, 2021. Please check back for more information.

The Tax Lien Sale Site is open for registration year-round. 
View Tax Sale Information for detailed instructions on how the online tax lien sale works.

The 2021 Mobile Home Tax Lien Sale will be conducted in person at the Administration Building in December, 2021. Mobile Home Tax Lien bidders are required to register on the Tax Lien Sale Site prior to the sale. 

For any questions about Tax Lien Sales, please contact our office at (303) 795-4550. 

Please note that any parcel with an unpaid amortized special assessment installment will have all future installments brought forward and become part of the total lien amount.