Tax Assessment Appeals

Appeal Your Assessment: Download the PDF's Below

In Colorado, the County Assessor must re-value property in every odd numbered year. All metro counties are similar but check your mailed assessment to be sure.

From the Adams County Assessor website;

“Appeals for real property value or its classification are held May 1st thru June 1st.
During this time you may appeal your value by mail, fax, or in person.
The value of residential property is based on the market approach to value. Generally, the value of all other
property is based on consideration of the market, cost, and income approaches to value.

The appraisal data used to establish value is from the 18-month period ending June 30, 2014. We can only consider sales and other market information from 2013 and the first 6 months of 2014 for values set for 2015 and 2016. If you purchased your property, or if you had an appraisal done after June 30, 2014, we cannot consider it in our review of values for 2015 and 2016. We review appeals for the valuation of the property only, not the amount of taxes you pay.”


If you disagree with the "current year actual value" or the classification determined for your property, you may file a protest by mail or in person with the County Assessor.

You must protest to the Assessor either by mail or in person no later than June 1st in order to preserve this right.

Opportunity for 2-4 Unit Owners – Review the Comparable Sales. 
After receiving the Notice of Value, which is to be mailed out no later than May 1st, the Owner should compare the re-evaluation to the list of comparable sales from the proper time frame.

Make sure the Assessor is using like-kind properties for comparison. Duplex for Duplex – Triplex for Triplex – Fourplex for Fourplex! Using a newer and higher priced Single Family Home as a comparable has been a basis for an appeal to a lower assessment.

This offers the opportunity for 2-4 unit income property owners to protest their assessment and lower the tax amount. Lower taxes and expenses increases the Cash Flow and Net Operating Income which in turn adds value to the property.

I helped a Jefferson County duplex owner Protest his assessment. We were able to get the duplex assessment reduced $78,830 with info obtained from my comparable sales report!

If you find a discrepancy, follow the directions with the Notice or from your counties website to appeal. It is best to do it in person, as quickly as possible and to always stick with the process to the end.

Below is an explanation “What to Expect After You Appeal” from the Jefferson County Assessor website;

If you appeal, we will mail you a Notice of Determination by the last working day in August. This notice will show the adjustment to value, if any, made by the Assessor's Office and explain how to appeal to the County Board of Equalization (County Commissioners) if you are still dissatisfied. The appeal to the County Board of Equalization (CBOE) must be filed by September 15. The CBOE meets July through October. They must conclude their hearings by November 1 and notify petitioners of their decision within five working days.

If you wish to appeal a decision of the CBOE, you must do so within 30 days of their decision. Your options are described on their response to you.

To get started, use the COMPS Links at the top of the page to get to the 2-4 unit comparable sales of the County of your property. Peruse the SOLDS to see if you have a reason to appeal! If you do, follow the instruction. If you have any questions, feel free to contact Keith.

For more information from the specific counties, try the links below.