Appeal Guide

Reminder: The appraisal date for 2019 to 2020 property values is June 30, 2018. No sales after this date will be used.

To see abatement forms for prior values, visit: 
Colorado Department of Local Affairs for an Abatement Petition
  1. Real Property
  2. Personal Property
  3. Taxpayer Rights for Further Appeals

Important Dates


  • May 1 - Notices of Valuation are mailed
  • May 1  - Protest process begins
  • June 3 - Last day to submit protest (postmarked no later than this day)
  • July 1 - Assessor mails a Notice of Determination

Protest Form


Access the protest form (PDF). We also request clarification on which property is being protested, so include an account number, parcel number, or physical address along with owner's name. To look up your account information, visit our database site.

Protest Options


Options to Protest the Value (please choose only 1 of the 3): 
  • By Mail:
    Pitkin County Assessor 
    506 E. Main St.
    Suite 202
    Aspen, CO 81611
  • In Person:
    Pitkin County Courthouse 
    506 E. Main St.
    Suite 202
    Aspen, CO
    To speak to an appraiser, arrive between 10 a.m. and 3 p.m., Monday through Friday.
  • By Fax:
    Fax  970-920-5174

Agent Authorization


The Assessor sets the value, not the taxes, thus, only the value can be protested. If an agent is appointed to act on behalf of the owner, please submit a signed agent authorization form (PDF).