🏡 Colorado Property Taxes: What Homeowners Should Know About Assessment Appeals
If you believe your property’s assessed value is higher than its actual market value, Colorado law gives property owners a process for challenging that valuation.
But one important detail: there is not a single statewide October 15 deadline for residential property assessment protests. For 2026, the standard real-property protest deadline was June 1, while counties using Colorado’s alternate protest and appeal procedures may have different, later deadlines.
🔎 When might an appeal make sense?
Homeowners may want to review their valuation if:
• Comparable properties suggest a lower market value
• The property has significant condition issues or defects
• The assessor’s property characteristics appear incorrect
• Local market conditions have changed significantly
• A recent purchase provides relevant evidence of value
📋 What information can help?
If you are challenging an assessment, consider gathering:
• Recent comparable sales
• Your purchase information, if applicable
• Photos showing the property’s condition
• Documentation of repairs, defects or other factors affecting value
• Other information that supports your opinion of the property’s market value
⚠️ Check Your County’s Deadline
Colorado’s property-tax protest process can vary depending on whether your county uses the standard or alternate procedure. The Colorado Division of Property Taxation recommends checking the requirements and deadlines that apply to your county.
If you disagree with your property’s valuation, don’t wait until the last minute to review your assessment and contact your county assessor.
A successful reduction in assessed value may reduce the property taxes owed, depending on the applicable mill levies and other factors.
📍 For official information:
Colorado Division of Property Taxation
Your County Assessor’s Office
Colorado Board of Assessment Appeals
Property-tax rules and deadlines can be complex. Verify the deadline that applies to your specific property and county before filing.