What Is a CMA Report in Real Estate?

A CMA report, short for comparative market analysis, is an estimate of what a property should sell for based on recent sales of similar homes nearby. It is usually prepared by a real estate agent to guide a listing price or support an offer, and it is not an appraisal. That distinction is the first thing to understand. A CMA is a well-reasoned opinion built from market evidence. It has no standing with a lender, a court, or a tax assessor. What it does have is speed, local knowledge, and transparency about how the number was reached, which is often exactly what a buyer or seller needs.

What is inside a CMA report?

A complete one has five parts. Subject property profile. Address, square footage, bedrooms and bathrooms, lot size, year built, garage, condition, and any notable features. Everything downstream depends on this being right. Closed comparable sales. Three to six properties that recently sold, similar in size, age, style, and location. These are the backbone of the estimate, because they represent prices buyers actually paid. The adjustment grid. Each comparable is adjusted up or down to account for its differences from the subject property. This is where the analysis actually happens.

How are comparable sales selected?

Good comp selection follows a rough priority order. 1. Geography, and specifically submarket. Same subdivision or same neighborhood beats a closer property across a boundary. A house half a mile away in a different school zone, a different HOA, or across a major road can belong to an entirely different pricing market. 2. Recency. Sales within the last three to six months are strongest. Older sales need a market conditions adjustment. 3. Size. Comps should be within roughly 10 to 20 percent of the subject's living area. A 1,200 square foot comp for a 2,000 square foot subject requires an adjustment large enough to swamp the analysis. 4. Type and style. Detached to detached, townhouse to townhouse, and ideally similar age and construction. 5. Condition. A renovated comp is not evidence for a dated subject without an adjustment, and vice versa. The most common failure is a comp set that quietly crosses into a cheaper or pricier submarket because the properties happen to be close on a map. That single error can move a valuation by 20 percent or more, which is why being able to see and change the comps matters so much.

How do adjustments work?

The rule is counterintuitive at first: you adjust the comparable toward the subject, never the other way around. - If the comparable is superior to the subject, subtract from the comparable's sale price. - If the comparable is inferior, add to it. You are answering the question, what would this comparable have sold for if it were identical to the subject property? Adjustments should be modest. When the total gross adjustment on a comp exceeds roughly 15 to 25 percent of its sale price, that comp is telling you it is not really comparable.

A worked adjustment grid (illustrative only)

These numbers are invented to demonstrate the method, not drawn from a specific market. Subject: 3 bedrooms, 2 baths, 1,720 square feet, built 1998, 2-car garage, no pool.

The three adjusted values land between $403,450 and $408,675, which supports an indicated value near $405,000. A tight cluster like that is a sign of a healthy comp set. When adjusted values spread across $60,000, the comps are wrong, the adjustments are wrong, or the market is genuinely unsettled, and the honest answer is a wider range rather than a confident midpoint. Notice that Comp 3 sold for the most and adjusted to roughly the same place as the others. Raw sale prices tell you very little until the adjustments are done.

CMA vs appraisal vs BPO vs AVM

How do investors use a CMA? Setting an ARV. For a flip, the after-repair value is a CMA on a property that does not exist yet. You are pulling comps that match what the house will be when the work is done, not what it is today. Confusing the two is how flippers end up with an as-is estimate they think is an ARV. Supporting an offer. A seller who is anchored $40,000 above the market is much easier to move with three adjusted comparable sales than with an opinion. Checking an automated estimate. Any model number is worth verifying against the comps behind it, especially on a property with unusual features or in a neighborhood with mixed housing stock. Deciding whether to walk. A CMA that produces a wide, uncertain range on a thin comp set is itself useful information. It tells you the exit price is less predictable than you assumed.

Where to build one

You can build the grid above by hand, and doing it once by hand is genuinely worth the hour. For repeat work, the CMA report tool assembles the comparable sales, adjustments, and market context into a report you can share, and the ARV calculator handles the after-repair version for renovation deals. Two things are worth insisting on in any tool you use. The comps should be visible and editable, because a valuation you cannot inspect is a valuation you cannot check, and the tool should be honest about how often it is right. Resideline freezes its estimates when a property lists and grades them against the actual closing price, with results published on a public accuracy dashboard, across live valuation coverage in 31 states. Once you have a value you believe, take it into the deal analyzer and see whether the deal works. A CMA tells you what a property is worth. It does not tell you whether you should buy it.