Colorado · County seat: Castle Rock
Douglas County, CO property taxes (2026)
✓ Verified August 2026 against official county pages — 3 sources linked below.
| What's the rate? | 7.05% school / 6.8% local |
| When is payment due? | Pay in halves — last day of February and June 15 — or in full by April 30. Statements mail in January. |
| When does the county reassess? | Douglas County revalues all real property in odd-numbered years, like every Colorado county. 2026 values carry over from the 2025 revaluation unless the property changed; the next full revaluation lands with the May 1, 2027 Notices of Valuation. |
| When is the appeal deadline? | June 8, 2026 — how to appeal |
Payment due dates
Tax bills go out January 2027.
| Payment | Due | Delinquent after | Notes |
|---|---|---|---|
| First half (2026 taxes) | February 28, 2027 | — | Due the last day of February |
| Second half (2026 taxes) | June 15, 2027 | — | |
| Or pay in full | April 30, 2027 | — | Single-payment option |
If you miss the deadline: Late installments accrue interest at 1% per month. Long-unpaid taxes head to the county's annual tax lien sale in the fall.
Tax rate
2026 residential assessment rates (statewide): 7.05% school / 6.8% local (of actual value; local side reduced 10% (up to $70,000) first) — Your bill = assessed value × your district's total mill levy ÷ 1,000. Douglas mill levies vary by school district and metro district — many newer neighborhoods carry sizable metro-district mills
Reassessment schedule
Douglas County revalues all real property in odd-numbered years, like every Colorado county. 2026 values carry over from the 2025 revaluation unless the property changed; the next full revaluation lands with the May 1, 2027 Notices of Valuation.
| Cycle | biennial (odd years) |
| Next reassessment year | 2027 |
| Notices usually mail | May (Notice of Valuation) |
Think your value is too high?
The appeal deadline rule in Douglas County: File your protest with the assessor between May 1 and June 8 (C.R.S. 39-5-122). For 2026 that means June 8, 2026. Step-by-step instructions, forms, and where to file: how to appeal your Douglas County assessment.
Want a lower bill without arguing value? Check what you can claim: Douglas County exemptions (homestead, senior, veteran).
Common questions
- When are Douglas County property taxes due?
- Statements mail in January. Pay in halves — last day of February and June 15 — or in full by April 30. Late payments accrue 1% interest per month.
- When can I appeal my Douglas County value next?
- May 1 through June 8, 2027 — and it's the big one: 2027 is a revaluation year, so every home gets a new value on the May 1 notice. Filing with the assessor is free.
- How is my Douglas County bill calculated?
- Assessed value × total mill levy ÷ 1,000. For 2026, homes are assessed at 7.05% of actual value for schools and 6.8% for local governments (after a 10% local-side value reduction, up to $70,000). Your mill levy depends on your school and metro districts.
- Why do neighbors in a newer subdivision pay so much more?
- Metro districts. Many newer Douglas County neighborhoods carry metro-district mill levies that repay development bonds — they can add meaningfully to the total levy. The assessor's site shows the districts attached to any address.
Who to contact
| Assessor (values, appeals, exemptions) | Douglas County Assessor |
| Treasurer (bills, payments) | Douglas County Treasurer |
Sources
Every fact on this page comes from an official page. Check them yourself:
- Douglas County Assessor — checked 2026-08-12
- C.R.S. § 39-5-122 — protest window — checked 2026-08-12
- Summit County — Understanding Property Taxes in Colorado (2026 assessment rates) — checked 2026-08-12