Colorado Properties With Back Taxes: Tax Delinquent Properties for Sale List 2026

If you came here for tax liens, start in Property Research and choose Tax Lien.

Liens without a set sale date sit under Timing not assigned yet. That includes over the counter liens you can buy now, with no auction.

Pick a state and a county. I'll use Maricopa County, Arizona.

Tick Mapped only to see each lien on the map, and switch to aerial imagery to look at the property from above.

Open a lien to see the full research.

The Research Score grades it from A to D, out of one hundred, and shows where the points come from.

Estimated value and confidence gives you a value range, and tells you how far to trust it. It's a starting point, not an appraisal.

Risk flags come up before you buy: whether it's still available, liens that may survive, and a source that may be out of date. Open one to see what to check.

The due diligence checklist shows the lien to value ratio and the back taxes, and what you still need to verify yourself.

Sources and freshness links every fact back to the county's own record.

Then calculate your maximum bid. You get a comfortable range, a caution range, and the price where you should stop.

Back in Research, mark it as a bid candidate, and add private notes that only you can see.

Save your search as a Deal Radar, and new matches come to you by email.

That's tax liens: from a county to a lien worth buying, with every fact sourced to the county.