Jefferson County Property Tax Appeal — Colorado

Rob Hartley·Updated February 15, 2026

Jefferson County, located along Colorado's Rocky Mountain Front Range west of Denver, has a median home value of $436,276 with an effective property tax rate of 0.66%, significantly lower than the national median of 1.02%. The median annual property tax bill in Jefferson County is $2,797, which is $397 higher than the national median of $2,400. The county contains notable population centers including its county seat Golden, along with major cities like Lakewood, Westminster, and Arvada. Property tax appeals matter in Jefferson County as homeowners may be able to reduce their tax burden through the formal appeal process.

Notable cities: Golden, Lakewood, Westminster, Arvada

Median Home

$436,276

Tax Rate

0.66%

Annual Tax

$2,797

Population

approximately 580,000

2026 Appeal Deadline: June 9

Property owners may file an appeal beginning May 1 through June 9 of each year. Any mailed appeal must be postmarked no later than June 9, 2026. If dissatisfied with the assessor's determination, you must file your appeal to the Board of Equalization by Sept. 15.

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

How Jefferson County Assesses Property

6.8%of market value

Assessed by: Jefferson County Assessor's Office

Assessment cycle: biennial

Notices typically mailed: May 1 of each year

Assessed values in Jefferson County are calculated by multiplying the actual value, which is determined by the Assessor's office, by the assessment rate. For tax year 2026 payable 2026, the residential assessment rates are 7.05% for School Districts and 6.25% for Local Government. For example, if your home's market value is $436,276 (the county median), at Colorado's 6.8% blended assessment ratio your assessed value would be $29,667, resulting in approximately $2,797 in annual taxes at the county's effective rate of 0.66%.

The Appeal Process

Appeals are heard by the County Board of Equalization. The Board of Equalization conducts hearings that must be concluded by November 1, with decisions issued within five business days.

Step 1: File your appeal with the Jefferson County Assessor between May 1 and June 9, explaining why you believe the assessor's value is incorrect

Step 2: Receive a notice of determination from the Assessor by August 15 showing any adjustment to value

Step 3: If dissatisfied with the assessor's decision, file an appeal to the County Board of Equalization by September 15

Step 4: Attend your Board of Equalization hearing (must be concluded by November 1) and receive notification of the decision within five business days

Step 5: If you wish to appeal the BOE decision, you must do so within 30 days to the Board of Assessment Appeals or District Court

Required form: Appeal form or letter explaining why the assessor's value is incorrect

Filing Methods

online:File through the Jefferson County Assessor's website at https://jeffco.us

mail:Mail appeal to Jefferson County Assessor, 100 Jefferson County Parkway, Suite 2500, Golden, CO 80419

in-person:Visit the Assessor's Office at 100 Jefferson County Parkway, Suite 2500, Golden, CO during business hours

Evidence to Bring

Recent sales data of comparable propertiesIndependent appraisalPhotos and repair estimates

Jefferson County Assessor Contact

Jefferson County Assessor's Office

Phone: (303) 271-8600

Address: 100 Jefferson County Parkway, Suite 2500, Golden, CO 80419

Website: https://www.jeffco.us/658/Assessor

Online Portal: https://propertysearch.jeffco.us/

Hours: Monday through Thursday 7:30 a.m. to 5 p.m., Closed on Fridays

Tax Exemptions in Jefferson County

Senior Property Tax Exemption

50% of the first $200,000 of value

Provides seniors with a reduction in the amount they pay in taxes on their primary residence which they have occupied for at least 10 consecutive years

Eligibility: Must be at least 65 years old on January 1 of the year in which you want to qualifyDeadline: July 15

Disabled Veteran Property Tax Exemption

100% exemption for qualifying disabled veterans

100% exemption from taxation of the total appraised value of your residence homestead for veterans with 100% disability compensation

Eligibility: Veterans who receive 100% disability compensation due to a service-connected disability from the US Department of Veteran AffairsDeadline: July 1

Mobile Home Property Tax Exemption

100% exemption if home value is $28,000 or less

Exemption from property taxes for mobile homes and manufactured homes worth $28,000 or less

Eligibility: Mobile homeowners including manufactured homes valued at $28,000 or lessDeadline: Contact assessor for deadline

Official Resources

Jefferson County Assessor Website →

Official website for the Jefferson County Assessor's Office with property search, appeal information, and exemption applications

Jefferson County Property Search Portal →

Search for property information, view assessments, and access property records for any address in Jefferson County

Jefferson County Treasurer Property Tax Portal →

Pay property taxes online, view tax bills, and access payment history through the county treasurer's office

Colorado Department of Local Affairs Property Tax Resources →

State-level property tax information, calculators, and resources for understanding Colorado's property tax system

Check Your Jefferson County Assessment

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

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Frequently Asked Questions

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

In Jefferson County, property tax appeals must be filed between May 1 and June 9 each year, with mailed appeals postmarked no later than June 9. It is recommended to appeal early in May as the last few days of the appeal period are often very busy and you may experience delays. If you're dissatisfied with the assessor's decision, you have until September 15 to file an appeal with the Board of Equalization.

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

To file your property tax appeal online in Jefferson County, visit the Jefferson County Assessor's website at https://jeffco.us/658/Assessor. The online portal allows you to submit your appeal electronically along with any supporting documentation. You should explain why you believe the assessor's value is incorrect and may include evidence such as recent sales of comparable properties, an independent appraisal, or documentation of property condition issues that affect value.

What is the homestead exemption worth in Jefferson County?

The Senior Property Tax Exemption in Jefferson County reduces the taxable value by 50% of the first $200,000 of your home's value. For example, on a home valued at $400,000, you would receive the maximum exemption credit of $715.00 in tax savings (based on a typical mill levy of 100.000). To qualify, you must be at least 65 years old on January 1, have owned the property for at least 10 consecutive years, and occupy it as your primary residence.

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

The Jefferson County Board of Equalization conducts hearings where both the homeowner and the assessor present their cases. All hearings must be concluded by November 1, and the board must notify you of its decision within five business days. During the hearing, you'll need to provide evidence supporting your claim that the assessed value is higher than the property's market value, which can include recent sales data of comparable properties, an independent appraisal, or documentation of property condition issues.

How much can I save by appealing my property taxes in Jefferson County?

Statistics show that about 25% of homes in America are unfairly overassessed, and pay an average of $1,346 too much in property taxes every year. With Jefferson County's median annual tax bill at $2,797, even a modest reduction in your assessed value could result in significant savings. The actual savings depend on how much your property was overassessed and the strength of your evidence, but successful appeals can result in hundreds or even thousands of dollars in annual tax savings.

What evidence do I need for a Jefferson County property tax appeal?

For a Jefferson County property tax appeal, you need evidence showing that the assessed value is higher than your property's market value, including recent sales data of comparable properties, an independent appraisal, or any documentation that supports your claim. You may also attach previous appraisals, expert opinions, and appraisals for similar properties as supporting documentation. Photos showing property condition issues, repair estimates, and documentation of any factors that negatively impact your property's value can strengthen your appeal.

Can I appeal my Jefferson County property tax assessment if I miss the June 9 deadline?

If you miss the June 9 deadline for the regular appeal process, you may still be able to correct an erroneous valuation through the abatement process for up to two prior years. The abatement procedure is similar to an appeal to the Board of Equalization, but can take several months to complete. Additionally, if you receive the assessor's determination and are dissatisfied, you still have until September 15 to appeal to the Board of Equalization for further review.

What are the property tax payment deadlines in Jefferson County for 2026?

For 2026 taxes payable in 2026, Jefferson County property tax payment deadlines are: First installment due Monday, March 2, 2026 (normally February 28, but that falls on a Saturday); Second installment due Monday, June 15, 2026; OR you can make a full payment by Thursday, April 30, 2026. Tax notices are mailed by the end of January each year, but failure to receive a tax statement does not relieve the property owner's liability for paying taxes on time.

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)Douglas County (Castle Rock)El Paso County (Colorado Springs)

← All Colorado property tax appeal info

Sources: https://www.jeffco.us/435/Appealing-Real-Property-Valuation | https://www.ownwell.com/trends/colorado/jefferson-county | https://www.jeffco.us/658/Assessor | https://www.jeffco.us/827/Information-for-Seniors

Last verified: 2026-02-15