What Is a Comparative Market Analysis (CMA)?
A CMA is an agent's estimate of what your home would sell for, built from recent comparable sales. How comps are picked, where CMAs go wrong, and how to read one.
A comparative market analysis (CMA) is an agent’s written estimate of what a specific home would sell for right now, built by comparing it to similar homes that recently sold nearby. It’s not an appraisal (that’s a licensed appraiser’s formal opinion, ordered by a lender) and it’s not an algorithm’s guess (that’s a Zestimate-style AVM). It’s a human argument: here are the most comparable recent sales, here’s how your home differs, here’s the price that follows.
The mechanics: how a CMA is built
A competent CMA has three moving parts:
- Comp selection. The agent pulls recent sales — ideally the last few months — that match the subject home on location, size, bed/bath count, condition, and type. In Greater Seattle this is harder than it sounds: a block can separate a view home from a no-view home, or a quiet street from an arterial, and those differences are worth real money here.
- Adjustments. No comp is identical, so the agent adjusts: the comp had a finished basement and yours doesn’t, subtract; yours has the remodeled kitchen, add. Good CMAs show these adjustments explicitly instead of hand-waving to a number.
- A range, not a point. The honest output is “likely sale range, and here’s the list price I’d choose given current competition” — including, in Seattle’s hotter pockets, whether to price under the expected sale number to invite multiple offers.
CMA vs. Zestimate vs. appraisal
| Tool | Who makes it | What it’s for | Weakness |
|---|---|---|---|
| CMA | Listing or buyer’s agent | Setting list price / offer price | Only as good as the agent’s comps and honesty |
| AVM (Zestimate, Redfin Estimate) | Algorithm | Rough orientation | Can’t see condition, view, or street noise |
| Appraisal | Licensed appraiser | Lender’s collateral check | Arrives after you’re in contract, not before |
If a machine estimate disagrees with the CMA, that’s not automatically a problem — but you should be able to see why in the comps.
Where CMAs go wrong
The failure mode worth knowing by name is the “buying the listing” CMA: an agent competing for your business shows you a flattering number to win the signature, then engineers price cuts later. The opposite failure exists too — a lazy CMA built on stale or mismatched comps that underprices a home with genuinely scarce features.
Other classic distortions:
- Stale comps in a moving market. A sale from five months ago in a fast-shifting season can mislead in either direction.
- Pending-blindness. Closed sales are history; pending sales are the current market. A sharp CMA references what’s pending and contingent right now, not just what closed.
- Ignoring condition honestly. Sellers anchor on the neighbor’s remodeled sale; the CMA’s job is to say, kindly, that your 1987 kitchen is not that house.
How to actually use one
As a seller: get CMAs from two or three agents and make each one walk you through their comps, not just their headline number. Ask: “Which comp is closest to my house, and what did you adjust?” An agent who can defend the adjustments is doing analysis; one who can’t is doing sales. And remember the CMA conversation is also the fee conversation — pricing skill and what the agent charges are two separate questions you should evaluate separately.
As a buyer: ask your agent for a quick CMA before any serious offer. It’s your defense against overpaying in a bidding war — especially before setting a cap on an escalation clause — and your evidence if the appraisal later comes in low.
A CMA tells you what a home is worth. It doesn’t tell you what the agent presenting it will cost you. Manaky Homes is a free marketplace where Greater Seattle agents publish their fees — flat, percentage, or hybrid — side by side. Join the waitlist and compare both halves of the decision.
