Best Colorado Property Tax Appeal Services in 2026 (Compared)
Last updated: June 26, 2026
Colorado property tax protests are filed with the county Assessor by June 8, 2026 for the 2026 tax year. If the assessor denies your protest, you can appeal to the county Board of Equalization (BOE) by July 15. Colorado has a unique odd-year reassessment cycle, so 2026 is a reappraisal year, making it especially important to review your Notice of Valuation. Denver, Jefferson, Arapahoe, El Paso (Colorado Springs), and Boulder counties have large, active appeal markets. Property values in the Denver metro area have risen sharply since 2020, making appeals particularly valuable.
Travis Bunn·Updated June 26, 2026Customers, In Their Own Words
As of August 2026, 42 percent of the 70 reviews on the Trustpilot profile for Ownwell are 1 star. See the live profile.
★☆☆☆☆
Ownwell was not worth it and lost me a ton of money
“They absolutely put no effort into properly protesting my property. I lost so much money because of them. The county over-valued my property by almost $400,000, and Ownwell didn’t even submit comps. … Just do it yourself.”
★☆☆☆☆
Very deceptive results
“Very deceptive results, claimed I would save $600 on my property taxes, the actual savings were $55. Plus, they charged their 25% fee on the $600 they claimed the saved me.”
★☆☆☆☆
Absolutely unacceptable
“Then I discovered that my appeal had been withdrawn. … One of the worst professional-service experiences I have ever had.”
And the reviews AppealDesk customers leave on the same platform:
★★★★★
Excellent Professional Property Tax Appeal Service
“I wanted to reach out to Travis at AppealDesk and express my sincere gratitude for your invaluable assistance in preparing my property tax appeal.”
★★★★★
An invaluable resource!
“Travis went above and beyond to help me successfully reduce my assessment by $120,700! His communication is prompt, clear, and concise but beyond that, I learned a lot about our property that I did not know and how the entire assessment appeal process works with Travis' wise and patient guidance! Travis is truly an invaluable resource. Thank you, Travis!”
★★★★★
AppealDesk is legit
“AppealDesk was extremely knowledgeable about the property tax appeal process. They handled all of my questions and helped me get the result I was hoping for.”
All excerpts are verbatim from public Trustpilot reviews, read from the live profiles on August 25, 2026. Reviews change over time, so check the profiles directly.
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#1: AppealDesk - Best for Budget-Conscious Colorado Homeowners
AppealDesk provides comparable sales, assessment-ratio context, and county-specific filing instructions for your Colorado county assessor and BOE. All 64 CO counties covered. Colorado uses 100% of actual value as the assessed value for residential properties at a 6.765% assessment rate for 2026.
Pros
- +$49 flat fee, the lowest price
- +All 64 Colorado counties covered
- +Evidence packet delivered in minutes
- +Keep 100% of your savings
Cons
- –You file the protest yourself (10-15 minutes)
- –No BOE hearing representation
#2: O'Connor & Associates - Best for Full-Service Colorado Appeals
O'Connor provides full-service protest and BOE hearing representation across Colorado. Strong for high-value Denver metro properties.
Pros
- +50+ years of experience
- +Full-service including BOE hearings
- +Statewide Colorado coverage
Cons
- –Contingency percentage not prominently published
- –Process can span the full protest cycle
All Services at a Glance
| Service | Price | Model | Coverage | Best For |
|---|---|---|---|---|
| AppealDesk | $49 flat | DIY + evidence | All 64 CO counties | Budget-conscious, any CO county |
| O'Connor | % of savings | Full-service | All CO counties | High-value Denver metro |
How to Choose the Right Service
Colorado protests must be filed by June 8, 2026 with the county assessor. Act early, evidence packets from AppealDesk are delivered in minutes. Denver metro properties have seen significant value increases, making the math strongly favor flat-fee ($49) over contingency on any savings above $200/year.
Free tools to help you decide
Try our free savings calculator to check if you're overassessed before choosing a service.
Once you're ready, our appeal checklist walks you through every step.
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Frequently Asked Questions
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Burned by another service this year?
If a property tax service dropped your appeal, missed your deadline, or stopped answering, we'll build your packet free. Email support@appealdesk.com with your address and what happened. We think every homeowner deserves a real shot at their appeal.