Browse source-reviewed property tax appeal guides for Colorado. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
Denver County: 2026 deadline guidance is 2026 assessor protest window closed June 8, 2026. Guide: https://fairpath.app/property-tax-appeal/colorado/denver-county
Montrose County: 2026 deadline guidance is 2026 real-property protest period closed June 8, 2026. Guide: https://fairpath.app/property-tax-appeal/colorado/montrose-county
Source: City and County of Denver, Assessor Frequently Asked Questions, https://denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Department-of-Finance/Our-Divisions/Assessors-Office/Assessment-FAQ. Reviewed 2026-07-16.
Source: City and County of Denver, Denver Property Taxation and Assessment System, https://www.denvergov.org/property. Reviewed 2026-07-16.
Source: City and County of Denver Assessment Division, Protest Property Values for the 2026 Tax Year, https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Department-of-Finance/Our-Divisions/Assessors-Office/Protest-Property-Values. Reviewed 2026-07-16.
Source: Colorado Judicial Branch, Colorado Property Tax Appeal Self-Help, https://www.coloradojudicial.gov/self-help/property-tax-appeal. Reviewed 2026-07-16.
Source: Montrose County, Montrose County Assessor, https://www.montrosecounty.net/68/Assessor. Reviewed 2026-07-16.
Source: Montrose County Assessor, 2025 Reappraisal Single-Family Home Sales, https://www.montrosecounty.net/DocumentCenter/View/24968/2025-Single-Family-Home-Sales. Reviewed 2026-07-16.
Source: Montrose County Assessor, 2026 Real Property Notice of Valuation, https://www.montrosecounty.net/DocumentCenter/View/25793/2025-Tax-Bill-Insert. Reviewed 2026-07-16.
Source: Montrose County Assessor, Montrose County EagleWeb Property Record Search, https://eagleweb.montrosecounty.net/eagleassessor/web. Reviewed 2026-07-16.