Montrose County's 2026 real-property protest window closed June 8, 2026. The Assessor's January notice required protests to be received or postmarked between May 1 and June 8. It also explained that the notice was included with the 2025 tax bill instead of being mailed separately in May 2026. Owners whose valuation changed were to receive an additional notice on or about May 1. A taxpayer who protested on time should use the Assessor's determination for any next-stage deadline; an owner who did not should not assume a late annual protest is available. FairPath can organize official parcel records, locally appropriate sales, condition material, and a manual appeal checklist. It does not create jurisdiction after a missed deadline, file a protest, interpret a determination, or appear for the owner.
Assessment context: Tax year 2026 is the intervening year in Colorado's two-year reassessment cycle. Montrose says most 2026 values remain the same as 2025 and represent actual value as of June 30, 2024. The official EagleWeb system provides current ownership, sales, tax history, and assessment history for more than 26,000 parcels, while the Assessor also publishes neighborhood-organized residential sale books. Verify account and parcel numbers, actual land and improvement values, property classification, neighborhood code, acreage, heated and effective square footage, actual and effective year built, design, quality, beds, baths, and sale history. Comparability varies across the City of Montrose, Olathe, Nucla and Naturita areas, irrigated acreage, canyon and mesa settings, mountain access, rural subdivisions, manufactured housing, agricultural improvements, and properties with well, septic, road, water-right, or outbuilding differences.
Filing process: For the annual process, a written protest had to reach the Montrose County Assessor or carry a timely postmark within the May 1-June 8 period. The office is now at 320 South 1st Street, Suite 280, Montrose, with mail directed to P.O. Box 1186, Montrose, CO 81402. A useful submission identifies the owner, account or parcel, property address, disputed actual value or classification, the owner's requested value, specific reasons, and supporting documents. Keep the signed protest, envelope, tracking, and every notice. After an assessor decision, the next appeal is not a repeat of the closed protest; the taxpayer must use the determination's County Board instructions and deadline. Any later Colorado Board of Assessment Appeals, district-court, or arbitration route depends on completion of the assessor and county-board stages.
Evidence to review: Use the county's own data architecture. EagleWeb supplies a parcel's assessment and transaction history, and the published 2025 single-family sales book sorts sales by Assessor neighborhood with sale date, price, time-adjusted price, acreage, subdivision, address, actual and effective age, architectural style, bedrooms, baths, quality, and square footage. Those fields support an explicit comparison rather than a list of prices. The county says 2025 values use sales from January 1, 2023 through June 30, 2024; because the 2026 intervening-year value generally carries that appraisal date, later sales should not be substituted without legal support. Add dated photographs, inspections, permits, bids, well or septic records, access facts, and documentation of agricultural or outbuilding use. Reconcile any difference between observed conditions and EagleWeb before calculating a value position.
Current deadline guidance: 2026 real-property protest period closed June 8, 2026. Montrose County required a 2026 real-property valuation protest to be received or postmarked between May 1 and June 8, 2026. That assessor-level period is closed. The county's January 2026 notice replaced the separate Notice of Valuation that otherwise would have been mailed in May and stated that changed valuations would be separately noticed on or about May 1.
Montrose combined its 2026 Real Property Notice of Valuation with the 2025 tax bill, replacing the separate notice that otherwise would have arrived in May.
Tax year 2026 is an intervening year, and the county says most values remain at the 2025 level representing actual value as of June 30, 2024.
Montrose EagleWeb exposes ownership, sales, tax history, and assessment history for more than 26,000 parcels, making it the starting point for record verification.
The county's residential sales book is sorted by Assessor neighborhood and includes time-adjusted prices, effective age, quality, acreage, design, and effective square footage.
Official filing authority: Montrose County Assessor. https://www.montrosecounty.net/DocumentCenter/View/25793/2025-Tax-Bill-Insert
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, Montrose County Assessor, https://www.montrosecounty.net/68/Assessor. Reviewed 2026-07-16.
Source: Montrose County Assessor, Montrose County EagleWeb Property Record Search, https://eagleweb.montrosecounty.net/eagleassessor/web. 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.