There are a few steps you need to take to appeal your property tax assessment. First, you must file a protest with your county’s assessor. You must submit this protest by the deadline specified in the Notice of Valuation. Typically, this falls on the last business day in June, unless the county has opted for an extended deadline. 

The next step is to appeal to your county’s Board of Equalization and file your case with the appropriate courts. The appeal must be filed by July 15th for real property or July 20th for personal property, unless the county has extended the deadline to September 15th. The County Board of Equalization conducts hearings and must notify you, the taxpayer, of its decision within five business days.

To file, you’ll want to verify any information your county assessor’s office has on your property. You can obtain this information when contacting your county’s Board of Equalization. Collect evidence for your appeal and identify witnesses willing to testify. 

If your appeal is denied, you have three options for further review. You can either:

• appeal to the Board of Assessment Appeals

• file a case in the district court, or

• submit the dispute to binding arbitration.

The appeal to the Board of Assessment Appeals or the district court must be filed within 30 days of the County Board of Equalization’s decision. Arbitration is an alternative process where a qualified arbitrator resolves the dispute. The decision for an arbitration is final and not subject to further review.

Note: Property owners have 30 days from the receipt of their statements to start a property tax appeal in Colorado. 

It is crucial to adhere to all deadlines and procedural requirements during this process to preserve the right to appeal. Your best chance at success is to hire a real estate attorney.