How to Read a Comparable Market Analysis and Understand What Your Home Is Actually Worth
A Comparable Market Analysis (CMA) is the primary tool for establishing an evidence-based list price. Knowing how to read one and what the data is and is not telling you is essential for any seller.
What Makes a Good Comparable Sale ('Comp')
Proximity:
Ideally, within the same neighborhood or subdivision, or within 0.5 to 1 mile in more rural areas
Recency:
Sold within the past 3 to 6 months. Markets change, and older sales may not reflect current conditions.
Size:
Within 15%–20% of your home's square footage. Configuration: Similar bedroom/bathroom count
Condition and updates:
A fully renovated home is not a good comp for an original-condition home, or vice versa — adjustments must be made for condition differences
Property type:
Detached single-family, townhome, and semi-detached homes are generally not directly comparable to each other without significant adjustments
Adjustments
No two homes are identical. When a comp differs from your property in a meaningful way, your agent or appraiser makes a financial adjustment. For example, if a sold comparable had an extra bathroom that your home lacks, a downward adjustment is made to the comp's sale price to reflect that difference. The goal is to arrive at an adjusted sale price that represents what each comp would have sold for if it were identical to your property.
Price Per Square Foot
Price per square foot ($PSF) is a quick screening metric but not a precise valuation tool. It is useful for identifying outliers if your home prices out significantly above or below the average PSF for its immediate market, which warrants investigation. But PSF does not account for layout efficiency, lot size, neighborhood micro-location, or condition, all of which matter enormously.
Online Estimates Are Starting Points Only
Zillow's Zestimate, Redfin's estimate, and similar automated valuation models (AVMs) can be useful for general orientation. But they are generated by algorithms, not local knowledge. They frequently miss by 5%–15% or more in specific Chester County neighborhoods, particularly for unique or older properties, properties with non-standard characteristics, or properties in rapidly changing submarkets. Never price your home based solely on an AVM.
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