Comparable Sales
Sales evidence is the backbone of most residential appeals — but not every recent sale is comparable.
01
What It Means
Comparable sales are transactions of similar properties that indicate what the subject property would likely have sold for as of the valuation date. Similarity is judged by location, size, age, condition, quality, utility, and the terms of the sale.
Adjustments are typically made for measurable differences, and sales that fall outside the assessor's statutory data period or that were not arm's-length transactions are generally given little or no weight.
02
Why It Matters
A well-selected set of three to five genuinely comparable sales, with clear reasoning about differences, is usually more persuasive than a long list of loosely similar properties.
In rural Northwest Colorado and Northeastern Utah, thin sales volume means comparables sometimes come from a wider geographic area, which makes explaining the adjustments especially important.
03
Common Misconceptions
- "My neighbor's assessment is lower, so mine is wrong." Assessment comparisons are generally weaker evidence than sales evidence.
- "Any recent nearby sale counts." Foreclosures, family transfers, and non-arm's-length sales are typically excluded.
- "More comparables is better." A small number of well-matched sales usually carries more weight than volume.
04
Questions to Ask
- Which sales did the assessor rely on, and can I review that list?
- Do my proposed comparables fall inside the statutory data period?
- What adjustments are appropriate for size, condition, acreage, or outbuildings?
- Were any of the assessor's comparables non-arm's-length transactions?
- What documentation should accompany the sales evidence?
05
Related Reading & Resources
The most successful real estate decisions often involve collaboration between several professionals working toward the same goal. Understanding each person's role helps you ask better questions and make more confident decisions.
06
Other Appeal Topics
- Understanding Property AssessmentsHow county assessors arrive at a value, and what the notice you receive in the mail actually represents.
- Market Value vs Assessed ValueTwo different numbers that measure different things — and confusing them is one of the most common sources of frustration.
- Agricultural ClassificationClassification can affect taxes more than valuation does, particularly on land and ranch properties.
- Commercial Property ValuationIncome-producing property is valued differently, which changes what evidence an appeal needs.
- Filing an AppealThe first step is usually a protest to the assessor, and the deadline is the part that cannot be fixed later.
- Board of Equalization HearingsThe county-level hearing where evidence is presented after an assessor protest is denied or partially granted.
Questions About Your Property Assessment?
Property taxes are one of the ongoing costs of owning real estate. If you're evaluating a purchase, reviewing an assessment, or considering an appeal, I'd be happy to help you understand the process, identify the questions worth asking, and connect you with local resources as you explore your options.
Schedule a Consultation