What Is a Comparative Market Analysis? A 2026 Guide
Every agent produces them. Not every agent can explain what makes one defensible.
Short answer
A comparative market analysis (CMA) is a valuation estimate produced by a real estate agent that prices a property by comparing it to similar homes that recently sold, are currently listed, or failed to sell in the same market. It is not a legal appraisal, it is not accepted by lenders, and its accuracy depends almost entirely on comp selection and adjustment quality.
What a CMA is for
Three jobs, and they are not the same job:
- Pricing a listing. Establishing a defensible asking range before a property goes live.
- Advising a buyer. Deciding what to offer, and how much room exists above or below list.
- Winning the appointment. Demonstrating to a seller, in a room, that you have done work their other two interviews did not.
A CMA built for the first job and a CMA built for the third look different. The math is identical; the presentation is not.
The four data sets inside a real CMA
1. Sold comparables
The backbone. Recent arm's-length sales of genuinely similar properties. This is what the market has actually paid, and it is the only category with a confirmed number attached.
2. Active listings
Your competition, not your evidence. Active list prices tell you what sellers hope for. They are useful for positioning and useless for valuation — a house can sit at $625,000 for nine months and prove nothing.
3. Pending sales
The leading indicator. Pendings show where the market moved after your most recent closed comps went under contract. In a shifting market, pendings are the most current signal you have, even without a confirmed price.
4. Expired and withdrawn listings
The most under-used category in the business. Expireds define the ceiling — the price at which this market demonstrably refused to buy. A seller who wants $700,000 in a market where three near-identical homes expired at $675,000 is looking at evidence, not opinion.
How a CMA is actually built
- Define the subject property precisely. Square footage, bed/bath, lot, year built, condition, and any features that move price in this specific market.
- Set search parameters. Typically a 0.5–1 mile radius, 3–6 months back, ±20% square footage, same school attendance zone, same property type. Tighten in dense urban markets, loosen in rural ones.
- Pull the candidate set, then throw most of it away. Aim to land on three to six strong comps rather than twelve mediocre ones.
- Adjust each comp to the subject property — plus or minus dollars for every meaningful difference. This is the step most agents rush, and it is the step that determines whether the number is real. See CMA adjustments explained.
- Reconcile to a range. Weight the strongest comps most heavily. Produce a low / likely / high band, not a single figure.
- Add market context. Absorption rate, days on market, and price trend direction turn a static number into a recommendation.
- Present it as a deliverable. Branded, structured, readable without narration.
What makes a comp a comp
| Factor | Standard to aim for | Why it matters |
|---|---|---|
| Proximity | Under 1 mile, same subdivision if possible | School zones and micro-markets change value at the block level |
| Recency | Sold within 3–6 months | Older sales describe a market that no longer exists |
| Size | Within ±20% of subject sq ft | Price per sq ft is non-linear across size bands |
| Style & age | Same property type, similar era | A 1978 ranch and a 2021 build are different products |
| Condition | Known and documented | The single largest unadjusted variable in most CMAs |
| Sale type | Arm's length only | Foreclosures and family transfers distort the set |
CMA vs. appraisal vs. BPO vs. AVM
Four things get confused constantly:
- CMA — agent-produced, free, advisory, no regulatory standard.
- Appraisal — state-licensed appraiser, USPAP standards, accepted by lenders, $400–$700, days to weeks.
- BPO (broker price opinion) — an agent-produced valuation ordered by a lender or servicer, usually for distressed or REO assets, and paid.
- AVM — algorithmic, instant, free, and off by a median 7.20% on off-market homes. See how accurate a Zestimate really is.
Only one of those is legally sufficient for a mortgage. The other three are opinions with different levels of rigor behind them.
Six mistakes that make a CMA indefensible
- Comp padding. Twelve comps signals volume, not diligence. Each weak comp drags the average toward noise.
- Using active list prices as evidence. They are aspirations.
- Skipping condition adjustments because they are hard to defend. Hard to defend beats silently wrong.
- Ignoring concessions. A recorded sale price with $20,000 of seller credits behind it is not the number you think it is.
- Presenting one number. A single figure invites the seller to negotiate with you instead of with the market.
- Anchoring to what the seller wants. The fastest way to take a listing you will spend four months reducing. See the real cost of overpricing a listing.
How long a CMA should take
Done manually — pulling comps, verifying each one, building adjustments, formatting a document — a careful CMA is a two-to-four hour job. Most agents doing it well are producing several a week, which is a meaningful share of a working month spent on assembly rather than selling.
That is the entire reason the automated comp report category exists. A CompsAgent report pulls comps, demographics, price trends, and mapping into a branded nine-page PDF in minutes, which changes the calculus on how many appointments you can prepare for properly.
The bottom line
A CMA is only as good as the comps inside it and the honesty of the adjustments applied to them. The document is the easy part. The judgment about which four sales genuinely describe this house — that is the part clients are actually paying for, and the part no algorithm has replaced.
Frequently asked questions
Is a CMA the same as an appraisal?
No. A CMA is produced by a real estate agent and is advisory; an appraisal is produced by a state-licensed appraiser under USPAP standards and is what a lender relies on. A CMA is typically free, an appraisal typically costs $400 to $700.
How much does a comparative market analysis cost?
Agents almost always provide a CMA free as part of a listing consultation. Paid automated comp reports generally run $20 to $80 per report, or $30 to $100 per month for subscription platforms.
How many comps should a CMA include?
Three to six strong comparables is the working standard. Adding weak comps to reach a higher count dilutes the analysis rather than strengthening it.
How far back can comps go?
Three to six months is standard. In slow or rural markets you may have to go back twelve months, in which case you should adjust for market movement over that period and say so explicitly.
Can a buyer get a CMA?
Yes. Buyer-side CMAs are used to decide what to offer and to assess whether a list price is supportable. The methodology is identical; the conclusion is used differently.
Does a CMA guarantee the sale price?
No. It estimates a defensible range based on what comparable properties have sold for. Final price is determined by what a buyer will pay and what a lender's appraisal supports.