PropertyTaxDates.com

Douglas County, CO · 2026

How to appeal your Douglas County property taxes

✓ Verified August 2026 against official county pages — 3 sources linked below.

2026 appeal deadline June 8, 2026 File your protest with the assessor between May 1 and June 8 (C.R.S. 39-5-122)

Your appeal is decided by the Douglas County Assessor, then County Board of Equalization, filed through Douglas County Assessor. Filing is free. The 2026 window has closed. The big one is next spring: 2027 is a revaluation year, so every Douglas County home gets a new value on the May 1, 2027 notice — and the protest window runs May 1 through June 8, 2027. You don't need a lawyer or an agent to file — homeowners do this themselves every year.

Step by step

  1. Read your Notice of Valuation in May It shows the assessor's actual value for your home. In revaluation years (2027 next) it's based on sales through the prior June 30.
  2. Pull the comparable sales The assessor's website lets you look up sales of similar homes in your area during the study period — that's the evidence that wins.
  3. File your protest by June 8 Online, by mail, or in person with the Douglas County Assessor. Filing is free.
  4. Get the Notice of Determination The assessor answers by the end of June (real property) with a written determination.
  5. Escalate if needed Appeal to the County Board of Equalization, then the Board of Assessment Appeals, district court, or arbitration.

File online: Douglas County Assessor online filing

Missed this year's deadline?

If June 8, 2026 has passed, you generally cannot appeal your 2026 value — but next year's window is a fresh start. Watch your mailbox around May for the Notice of Valuation and file early. Meanwhile, make sure you're not overpaying for a simpler reason: check your Douglas County exemptions.

Rates, due dates, and the calculator for this county: Douglas County, CO property taxes (2026).

Sources

Every fact on this page comes from an official page. Check them yourself: