Douglas County Property Tax Appeal — Colorado

Rob Hartley·Updated February 9, 2026

Douglas County is located between Denver and Colorado Springs along Colorado's Front Range. The county is known for its quality of life, strong economic foundations, and consistent population growth.

Notable cities: Castle Rock, Highlands Ranch, Parker, Lone Tree

Median Home

$338,700

Tax Rate

0.76%

Annual Tax

$2,590

Population

approximately 375,000

2026 Appeal Deadline: June 8

Property tax appeals must be filed between May 1 and June 8 each year in Douglas County

Property in Douglas County, Colorado — local tax assessment and appeal guide

How Douglas County Assesses Property

6.8%of market value

Assessed by: Douglas County Assessor's Office

Assessment cycle: biennial

Notices typically mailed: May

In Douglas County, the assessed value is calculated by multiplying the actual market value by 6.8%. This assessed value, not the market value, is used to calculate property taxes.

The Appeal Process

Appeals are heard by the County Board of Equalization. The Board of County Commissioners sits as the County Board of Equalization and appoints hearing officers to preside over hearings and make recommendations.

Step 1: Review your Notice of Valuation received in May

Step 2: Gather evidence such as comparable sales, photos of property condition, or repair estimates

Step 3: File your appeal between May 1 and June 8 via online portal, mail, or in-person

Step 4: Receive Assessor's decision by August 15

Step 5: If unsatisfied, appeal to County Board of Equalization (Sept 1-15)

Step 6: Attend hearing if scheduled (September-October)

Step 7: Receive Board decision by November 1

Required form: Online appeal form through Douglas County's appeal portal

Filing Methods

online:File online at https://appeals.spatialest.com/co-douglas

mail:Mail to Douglas County Assessor, 301 Wilcox Street, Castle Rock, CO 80104

in-person:Visit the Assessor's Office at 301 Wilcox Street, Castle Rock, CO 80104

Evidence to Bring

Comparable sales from the study periodPhotos showing property conditionRepair estimatesRecent appraisalsEvidence of errors in property records

Douglas County Assessor Contact

Douglas County Assessor's Office

Phone: (303) 660-7450

Address: 301 Wilcox Street, Castle Rock, CO 80104

Website: https://douglas.co.us/assessor/

Online Portal: https://appeals.spatialest.com/co-douglas

Tax Exemptions in Douglas County

Senior Property Tax Exemption (Homestead)

50% of the first $200,000 of actual value (saves $600-$1,000 annually)

Reduces actual value by 50% of the first $200,000

Eligibility: Age 65 or older, owned and occupied property for 10+ consecutive yearsDeadline: July 15

Disabled Veteran Exemption

50% of the first $200,000 of actual value

Reduces actual value by 50% of the first $200,000

Eligibility: 100% permanently disabled veterans as rated by VA, property as primary residenceDeadline: July 15

Gold Star Spouse Exemption

50% of the first $200,000 of actual value

Reduces actual value by 50% of the first $200,000

Eligibility: Surviving spouses of military members who died in serviceDeadline: July 15

Official Resources

Douglas County Assessor's Office →

Official county assessor website providing property valuation, assessment information, and property tax details for Douglas County.

Colorado Division of Property Taxation →

State-level property tax information, regulations, and resources from the Colorado Department of Local Affairs.

Douglas County Property Search →

Online portal to search and view property records, assessments, and tax information for properties in Douglas County.

Douglas County Treasurer - Property Tax Payments →

County treasurer's office for property tax payment information, due dates, and online payment options.

Douglas County Appeal Statistics

Success Rate

25-50%

% Who Appeal

20% (in 2023)

Check Your Douglas County Assessment

Enter your address to see if your Douglas County property is overassessed.

✓ All 50 states✓ Instant results✓ $49 flat fee

Frequently Asked Questions

What is the deadline to appeal my property taxes in Douglas County?

The deadline to file a property tax appeal in Douglas County is June 8. You must file your appeal between May 1 and June 8 each year. This window applies to both odd years when you receive a new valuation and even years when appealing the previous year's valuation.

How do I file a property tax appeal online in Douglas County?

To file online, visit https://appeals.spatialest.com/co-douglas and enter your property address. Click 'File an Appeal' then 'Start Appeal,' fill in your contact information and opinion of value, upload supporting documentation like comparable sales, and submit. The process typically takes just a few minutes.

What is the senior homestead exemption worth in Douglas County?

The senior homestead exemption in Douglas County reduces your actual property value by 50% of the first $200,000, which typically saves between $600 and $1,000 annually. You must be 65 or older and have owned and occupied the property for at least 10 consecutive years.

What happens at a Board of Equalization hearing in Douglas County?

At a Board of Equalization hearing, you'll present your evidence to a hearing officer appointed by the Board of County Commissioners. You'll explain why you believe your property is overvalued, show comparable sales or other evidence, and answer questions. The hearing officer makes a recommendation to the Board, who issues a decision by November 1.

How much can I expect to save by appealing my property tax assessment in Douglas County?

Douglas County historically adjusts 25-50% of appealed property values. While the amount saved varies by property, successful appeals often result in meaningful reductions. About 20% of property owners appealed in 2023, the highest percentage in county history.

What evidence should I include with my Douglas County property tax appeal?

Include comparable sales from properties similar to yours that sold during the study period (July 1, 2022 to June 30, 2024 for 2026-2026 taxes), photos showing your property's condition, repair estimates for needed maintenance, and documentation of any errors in the county's property records such as incorrect square footage or features.

For state-wide appeal information including Colorado's assessment ratio and deadlines, see our Colorado Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

More Colorado Counties

Adams County (Brighton)Arapahoe County (Littleton)Denver County (Denver)El Paso County (Colorado Springs)Jefferson County (Golden)

← All Colorado property tax appeal info

Sources: https://douglas.co.us/assessor/appeals/ | https://www.tax-rates.org/colorado/douglas_county_property_tax | https://douglas.co.us/assessor/residential-exemptions/ | https://smartasset.com/taxes/colorado-property-tax-calculator

Last verified: 2026-02-09