Appealing Real Property Valuation

The Assessor mails a notice of valuation to real property owners May 1 of each year. If a property owner believes the Assessor has incorrectly valued or classified the property, or that it was not valued fairly as compared to other properties, an appeal may be filed between May 1 and June 15. Use the form included with the notice of valuation for your appeal.

Agents may not file online using this form. Only the owner of the property may file online.
Agents must complete the paper form with the notice of value and appeal in person, or by mail, and submit written permission from owner for the agent to appeal the property.

Appeal Options

  1. Mail, Fax or Online
  2. In Person
  • You may elect to complete the protest form attached to your notice of valuation and mail it to:
    Ron Sandstrom
    Jefferson County Assessor
    100 Jefferson County Parkway
    Golden, CO 80419
  • You may fax it to 303-271-8616
  • You May File Online at: Residential Online Protest E-Form Filing
  • Your protest submission must be postmarked, transmitted by fax or entered online no later than June 15.

Timing is everything

It is better to appeal early in May. The last few days of the appeal period are often very busy and you may experience delays.

How to Appeal an Assessment

To appeal an assessment, you should explain why you believe the assessor's value is incorrect. By comparing your property to other similar properties that sold, you can determine whether your property has been fairly valued.

Property Records Search

Residential property sales information for most neighborhoods, along with additional property details, is available on this website. Get into our Property Records Search application, find your property and select "Neighborhood Sales."

Assessor Taxpayer Services

A complete list of residential property sales that occurred in your neighborhood will be sent to you upon receipt of a self-addressed, stamped envelope and description of your property. Mail your request to the above address. It will be up to you decide which, if any, of the sold properties are similar to yours in location, age, design and size.

Real Estate Information Line

Call 303-271-8666 for "inventory information" for up to three residences is provided over the phone. Simply supply the address(es), schedule number(s) or owner's name.

The Assessment Process

For a description of the assessment methods the assessor uses, see the Assessment Process area of this website.

What to Expect After You Appeal

If you appeal, we will mail you a notice of determination by the last working day in August. This notice will show the assessor's office adjustment to value, if any, and explain how to appeal to the County Board of Equalization (county commissioners) if you are still dissatisfied. You must file your appeal to the County Board of Equalization (CBOE) should be filed by September 15th. The CBOE meets July 1 through October 1. The board must conclude hearings by November 1, and notify petitioners of its decision within five business days.

If you wish to appeal a CBOE decision, you must do so within 30 days of the decision. Your options are described in the board's response.