Lower your Adams County property taxes
The Adams County Assessor revalues homes in Thornton, Westminster, Brighton, Commerce City and the rest of the county every two years, and 2027 values will reflect the market as of June 30, 2026. Median residential values fell 2–6% in 2025, and homes that didn't follow the market down may be carrying values that are too high. 30% of first-year savings, only if you save.
What a too-high value costs you
If your home is assessed at $500,000 but similar homes point to about $465,000, you're taxed on $35,000 too much. At a 0.66% rate that's about $231 a year. Our fee would be $69; you'd keep $162.
What gets missed in Adams County
- The 2027 reappraisal. Every home gets a new value in May 2027, based on sales up to June 30, 2026. Each reappraisal is a fresh chance to protest.
- Values that didn't fall. Adams medians dropped 2–6% in 2025. If yours held steady, it's worth checking.
- New-build neighborhoods. Fast-growing areas mix builder sales and resales. Builder incentives can inflate recorded prices.
- Condition. An original kitchen, an aging roof or a cracked foundation doesn't show up in the assessor's records.
Insider tip: Adams County's online appeal and Notice of Valuation lookup opens at assessornovs.adcogov.org during the May 1 – June 8 window. File there and attach your evidence.
Reviewed by the founder
Julien reviews every Adams County case personally and tells you the value we’ll ask for before anything is filed.
Get my free reviewAdams County calendar
| June 30, 2026 | Appraisal date: 2027 values reflect the market on this day |
| By May 1, 2027 | Adams County Assessor mails Notices of Valuation (May 1 is a Saturday) |
| May 1 – June 8, 2027 | File your protest with the Adams County Assessor |
| By August 15, 2027 | Adams County Assessor sends written Notices of Determination |
| September 15, 2027 | Deadline to appeal to the County Board of Equalization |
| By November 1, 2027 | County Board of Equalization decides appeals |
| 30 days after the decision | Appeal to the Board of Assessment Appeals, binding arbitration or district court |
| January 2028 | Tax bills for 2027 mailed |
Sources: Adams County Assessor — appeals process · Adams County — appeals calendar · Adams County — 2024 abstract of assessment and levies. Dates are checked each year; confirm with the county for your property.
Exemptions to check
If you're 65 or older and have owned and lived in your home for at least 10 years, the senior exemption takes 50% off the first $200,000 of actual value. Qualifying disabled veterans get the same exemption. For 2026, the local-government part of your tax is figured on your value minus 10% of the first $700,000. We check your exemptions free at sign-up.
Adams County questions
How do I appeal in Adams County?
Online through the Assessor's "File an Online Appeal or View NOV" page, or by mail or in person, May 1 – June 8.
When will I hear back?
Adams uses the later reappraisal-year schedule: Notices of Determination by August 15 and County Board of Equalization appeals by September 15. Board hearings run through November 1.
What comes after the Board?
Within 30 days of the Board's decision, you can go to the Board of Assessment Appeals, district court or binding arbitration.