How to read comps and decide what to offer

When you make an offer on a home, the strongest ground you can stand on is what similar homes nearby actually sold for. Those are the comparable sales, or comps. Learning to read them is the difference between an offer anchored in evidence and one anchored in hope.

What makes a comp a real comp

A useful comparable is close on the things that drive price: location, size, bedroom and bathroom count, age, and condition, and it sold recently. A house half a mile away that sold eight months ago in different condition is a weak comp. Three houses on nearby streets that sold in the last few months, similar in size and shape, are strong ones. Recency matters because the market moves.

Price per square foot is a starting point, not the answer

It is tempting to take the average price per square foot of the comps, multiply by the home's size, and call that the value. That is where automated estimates begin, and it is why they miss. Two homes of identical size can be worth very different amounts if one was renovated and the other was not, or if one backs to a park and the other to a highway. The math treats them the same. A buyer should not.

Where the raw numbers mislead

Some comps closed low for reasons the data does not show: a rushed sale, a dated home sold as-is, related parties. Others closed high because of concessions that never appear in the price. A comp is a data point with a story behind it, and the story changes what it means. This is exactly the gap a local agent fills, because they often know why a particular sale closed where it did.

Turning comps into an offer

Once you have a handful of genuine comps and have adjusted for the obvious differences, you have a defensible range. Where you offer inside that range depends on the rest: how long the home has been listed, how many other buyers are circling, and how motivated the seller is. In the current market, buyers have more room to negotiate than they have had in years, and a well-supported offer below a stale asking price is often reasonable.

Common questions

How many comps do I need before making an offer?

Three to five genuinely similar, recent sales is a solid basis. More helps only if they are truly comparable. One or two, or older sales, or homes that are not really alike, produce a shaky number.

Should I trust the automated estimate on the listing?

Treat it as a rough starting point, not a verdict. Automated numbers read public data and cannot see condition, renovations, or the exact lot, which is where much of the real value sits. They are a place to begin, not a number to offer on.

What if the comps disagree with the asking price?

That is useful information. If solid comps sit well below the asking price, the home may be overpriced, and a supported offer is a fair response. If they sit above, the home may be a genuine opportunity, and moving quickly matters.

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Sources: Zillow Research on pricing and time on market; NAR buyer guidance, 2026; Realtor.com market data, 2026.

This is general information, not financial advice. A licensed local agent can assess the specific comps for a home you are considering.