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Castle Rock, Douglas County, Colorado Property Taxes

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Property Taxes in Castle Rock, Colorado

  • Median Castle Rock, Colorado effective property tax rate: 0.63%, significantly lower than the national median of 1.02%, and higher than the Colorado state median of 0.50%.

  • Median Castle Rock, Colorado home value: $688,968

  • Median annual Castle Rock, Colorado tax bill: $4,367, higher than the national median property tax bill of $2,400.

How are property taxes in Douglas calculated?

Property taxes in Castle Rock, Colorado are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.

Understanding Castle Rock's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Castle Rock, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Castle Rock, Douglas County, Colorado Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

0.63%

Estimate Property Tax Bill

$4,340

$4,028

SAVE WITH OWNWELL

$774

Average Annual Tax Savings

How Does the Castle Rock Property Tax Calculator Work?

Use this Castle Rock property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Castle Rock's median effective tax rate of 0.63% — based on actual property records in Douglas County — to generate your estimate.

Enter your property's estimated assessed value — the figure the local assessor uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Castle Rock's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.

Your bill may vary by ZIP code within Castle Rock: rates range from $3,647.00 in 80104 to $6,341.00 in 80108, primarily due to differences in school district levies and local assessment districts.

Castle Rock's median property tax bill of $4,367 is higher than Colorado's median bill by $1,967, even though the city's 0.63% rate is lower than the state median of 0.50% and below the national median property tax rate of 1.02%. If your estimate is higher than expected, Ownwell can appeal your Castle Rock assessment — you only pay if we save you money.

About Castle Rock Property Taxes

About Property Taxes in Castle Rock, Douglas, Colorado

Castle Rock’s median effective property tax rate of 0.63% is higher than the Colorado state median of 0.50% and lower than the national median of 1.02%. This rate reflects Douglas County levies and local taxing districts that can vary by subdivision throughout the city.

Property tax rates are not uniform across Castle Rock. Homeowners in the 80108 ZIP code carry a median effective rate of 0.68%, while those in 80104 pay 0.51%. That spread of 0.17 percentage points across the same city shows how school district and local district boundaries can affect what you owe.

Castle Rock homeowners who believe their assessed value is too high can file a formal appeal with the Douglas County Tax Assessor before the June 1, 2026 deadline each year.

If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.

Property Tax Rates Across Castle Rock, Douglas County, Colorado

As noted earlier, local government entities set tax rates, which can vary widely within a state.

Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.

While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.

Below, you can compare Castle Rock's effective property tax rate to other cities in Colorado and the median property tax rates in Colorado and the U.S.

Property Tax Rates Across Castle Rock, Douglas County, Colorado

Source: Ownwell

0.21%

0.47%

0.73%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective Castle Rock Tax Rate

0.63%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective Douglas County Tax Rate

0.59%

Median Effective Colorado Tax Rate

0.50%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Castle Rock, Douglas County, Colorado

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
801040.40%0.42%0.51%0.84%0.99%
801080.46%0.59%0.68%0.77%0.92%
801090.43%0.62%0.64%0.65%0.66%

Source: Ownwell

Property Tax Assessment Values Across Castle Rock, Douglas County, Colorado

When examining property taxes in Castle Rock, Colorado, understanding the distinction between market value and assessed value is crucial.

The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. Douglas County estimates the market value for tax purposes.

The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The assessed value is the figure used to calculate your property taxes, or the amount multiplied by your tax rate to get your tax bill.

Assessment notices:

In Douglas County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.

Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. For Castle Rock, the median home price is $688,968, with tax bills ranging significantly across the county. 80108 has the highest median home price at $850,701.

Property Tax Assessment Values Across Castle Rock, Douglas County, Colorado

Source: Ownwell

$87,800

$532,572

$977,343

Median Castle Rock Market Value

$688,968

Median Douglas County Market Value

$725,700

Median Colorado Market Value

$519,879

Median United States Market Value

$235,294

Property Tax Assessment Values Across Castle Rock, Douglas County, Colorado

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
80104$433,476$538,917$622,166$745,000$964,023
80108$520,955$711,271$850,701$1,239,538$1,791,053
80109$538,861$601,169$691,120$817,514$1,007,811

Source: Ownwell

Property Tax Bills Across Castle Rock, Douglas County, Colorado

Property tax bills in Castle Rock are based on the assessed value of a home and the local tax rate set for Douglas County. When a home’s market value rises, the assessed value can increase too, which can lead to a higher tax bill. For homeowners, that means a larger share of housing costs can go toward property taxes, especially in a market with a median home price of $688,968.

In Castle Rock, the 25th percentile property tax bill is $3,296, the 75th percentile is $5,868, and the 90th percentile is $8,449. The highest median tax bill is $6,341 in ZIP code 80108, while the lowest median tax bill is $3,647 in ZIP code 80104. Compared with the national median property tax bill of $2,400, many homeowners here pay more.

Ownwell helps homeowners lower their property tax bills by reviewing assessments and identifying opportunities to appeal overassessments. That can reduce what you owe and help you keep more money each year.

Property Tax Bills Across Castle Rock, Douglas County, Colorado

Source: Ownwell

$164

$3,323

$6,481

Median Castle Rock Tax Bill

$4,367

Median Douglas County Tax Bill

$4,516

Median Colorado Tax Bill

$2,732

Median United States Tax Bill

$2,400

Property Tax Bills Across Castle Rock, Douglas County, Colorado

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
80104$1,913$2,690$3,647$5,177$6,594
80108$3,473$4,776$6,341$9,020$12,972
80109$3,085$3,629$4,206$5,047$6,350

Source: Ownwell

Don't miss the deadline to appeal!

Frequently Asked Property Tax Questions in Castle Rock, Colorado

How are property taxes calculated in Castle Rock, Colorado?
Property taxes in Castle Rock, Colorado are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.
How do I appeal my property taxes in Castle Rock, Colorado?
To appeal your property taxes in Castle Rock, Colorado, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.
What property tax exemptions are available in Castle Rock, Colorado?
Common property tax exemptions in Castle Rock, Colorado include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.
When are property taxes due in Castle Rock, Colorado?
Property tax deadlines in Castle Rock, Colorado vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.
How can Ownwell help reduce my property taxes in Castle Rock, Colorado?
Ownwell provides professional property tax appeal services in Castle Rock, Colorado. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.