How to Find Comparable Sales That Actually Matter

Not all comps are created equal. Learn the criteria that separate useful comparables from misleading ones.

Comparable sales analysis is the foundation of every property valuation, but selecting the right comps is more art than science. The quality of your comps directly impacts the accuracy of your ARV, which in turn determines whether a deal will be profitable or a money pit.

The ideal comp should match your subject property across five key dimensions: location (within 0.5 miles for urban, 1 mile for suburban), recency (sold within the last 90 days), size (within 20% of square footage), condition (similar renovation level), and property type (single-family vs. multi-family, etc.).

One of the biggest mistakes investors make is cherry-picking high-value comps to justify a deal they've already emotionally committed to. This confirmation bias can be devastating. Instead, use a systematic approach: pull all sales within your radius and time frame, then filter methodically.

Adjustments are necessary when perfect matches don't exist. A common framework is to add or subtract $20-40 per square foot for size differences, $5,000-15,000 per bedroom or bathroom difference, and 5-10% for significant condition differences.

Automated comp analysis tools can remove human bias from this process by applying consistent methodology across every deal in your pipeline.