Understanding Your 2026 Douglas County Property Tax Bill

If your 2026 property tax bill went up even though your home's value did not move much, you are not imagining it. Colorado has been reworking its property tax system since the 2023 valuation spike, and the relief lawmakers passed is being phased in slowly. This guide explains what changed under SB24-233, why bills are still rising for many Douglas County homeowners, and when your next chance to appeal actually comes.

How Colorado Property Tax Works

Colorado reappraises residential property in odd-numbered years (2023, 2025, 2027, and so on). Your tax is based on your property's assessed value multiplied by an assessment rate, then by local mill levies. The current cycle used a June 30, 2024 valuation date, with valuation notices mailed in May 2025.

What SB24-233 Changed

After the 2023 valuation jump sent bills soaring, the legislature passed SB24-233 (along with related bills) to provide phased relief. For 2026, the key mechanics are:

• The residential assessment rate is roughly 6.8% for the local-government portion and approximately 7% for the school-district portion.
• An exemption of about 10% of your home's value—capped at $70,000—is subtracted before the rate is applied.
• Because that exemption comes off the top, the effective rate is somewhat lower than the headline assessment rate for an average-value home.

The important nuance: this relief is phased in gradually, not delivered all at once. As a result, many Douglas County homeowners are still seeing a higher bill in 2026 than the year before, even when their market value was essentially flat. Confirm the exact rates and exemption on the Douglas County Assessor's materials for your property.

Can You Appeal? Not Right Now

Because valuations only reset in odd years, the appeal window tied to the current values was in 2025 and has closed. The next reappraisal notices are expected around May 2027—that is when your next opportunity to protest your valuation opens. Mark it on your calendar, review your notice carefully when it arrives, and gather comparable sales if you plan to appeal then.

Fitting Property Taxes Into Your Financial Plan

A rising, somewhat unpredictable property tax bill is more than an annoyance—it is a real line item in your household cash flow, and it matters even more in retirement when income is fixed. A few practical steps:

• Check your mortgage escrow. A higher tax bill can trigger an escrow shortage and raise your monthly payment; plan for it.
• Budget property taxes as a growing expense, not a flat one, in your retirement-income plan.
• Confirm you are getting any exemptions you qualify for, such as the Colorado Senior Homestead Exemption if you are 65+ and meet the ownership/occupancy rules.

Folding property taxes into a broader plan is exactly the kind of thing a local fiduciary advisor helps with. Connect with a Castle Rock wealth management advisor or a planner in your part of Douglas County. You may also want to review our tax planning resources.

This guide is general educational information, not tax advice. Assessment rates and exemptions are set by Colorado law and administered by your county assessor; confirm current figures with the Douglas County Assessor or a qualified tax professional. Sources: Douglas County Assessor and published analysis of SB24-233.