What is a comparative market analysis?

What goes into one

The core of a CMA is closed sales, usually from the past three to six months and usually within a tight radius. In a dense condo building the comparables may all sit in the same tower. On an acre lot outside a subdivision the search may have to widen, and the adjustments get larger as it does.

Active listings appear too, but as context rather than evidence. They tell you what your home will be shown against, which matters for strategy, and they tell you nothing about what buyers will pay, because an asking price is a hope until someone accepts it.

Pending sales are the most current signal available. Their contract prices are not public, but knowing that three similar homes went under contract in the past fortnight says something a set of ninety-day-old closings cannot.

Expired and withdrawn listings are worth a look for the opposite reason. They show where the market stopped, which brackets the top of a realistic range.

How adjustments work

No two homes are identical, so a raw average of nearby sales is close to meaningless. The adjustment step is what turns a list of sales into a valuation.

The principle is straightforward: adjust the comparable, never your home. If the comparable sold with a renovated kitchen and yours is original, the comparable's price comes down to make it equivalent to yours. If it had one fewer bedroom, its price goes up.

The amounts are the judgement. A pool adds different value in different communities. An extra garage bay matters more where street parking is scarce. Impact windows carry a premium that has grown as insurance has, and that premium differs between a coastal condo and an inland single-family home. This is why a CMA from someone who works your specific area beats a more elaborate one from someone who does not.

Reading the result

A good CMA gives you a range and explains it, rather than a single number presented as fact. The width of the range tells you something: a tight range means the comparables agreed, and a wide one means your home is unusual for its area or the recent data is thin.

It should also be legible. You should be able to see which sales were used, why those and not others, and what each adjustment was for. A number you cannot interrogate is a number you cannot rely on when a buyer's agent pushes back.

Where a CMA is not the right tool

A CMA prices a home against its market. It does not establish value for a lender, settle an estate, or satisfy a court. Those call for a licensed appraisal, which follows a defined standard and produces a defensible document.

For deciding what to list at, though, the CMA is the better instrument, because it is built around what buyers are doing now rather than what a lender will accept later.

What a CMA cannot tell you

A CMA prices the home. It does not tell you what you will walk away with, which depends on your payoff, commission, taxes, and any credits negotiated at closing. Those belong in a separate calculation, and confusing the two is how sellers end up surprised at the settlement table.

It also cannot predict a specific buyer. Occasionally a home sells above every supported comparable because one buyer wanted that particular property, and no analysis anticipates that. A CMA describes the centre of the distribution, not its edges.

It says nothing about how long a sale will take. Days on market is a separate question driven by pricing relative to the analysis, by presentation, and by how many competing homes sit in the same band.

Using a CMA when the market is moving

In a fast market a CMA built only on closed sales lags, because a closing reflects a contract signed weeks earlier. Where prices are rising, closed comparables understate current value; where they are falling, they overstate it.

The correction is to weight recent pendings and to look at the direction of the data rather than only its average. Three sales at rising prices over four months tell a different story from the same three averaged together.

It is also worth asking how many homes in your band went under contract recently versus how many listed. That ratio is a better read on demand than any single price, and it is the number that tells you whether the analysis is describing a market with more buyers than homes or the reverse.

Reading a CMA someone else prepared

Sellers often receive more than one analysis, and the numbers rarely match. That is normal, and the useful response is to interrogate the reasoning rather than pick the highest figure.

Look first at which sales were used. Are they genuinely comparable in size, age, condition and location, and are they recent enough to reflect the current market? A CMA leaning on a sale from a year ago in a market that has moved is describing history.

Then look at what was excluded and why. A nearby sale left out of the analysis should have a reason, such as a distressed sale, a transfer between family members, or a property so different that adjusting it would introduce more error than it removes. An analysis that quietly omits the inconvenient comparables is not an analysis.

Check the adjustments next. They should be stated, and they should be plausible. An adjustment of a few thousand dollars for a renovated bathroom is reasonable. One large enough to swing the conclusion should be explained in terms of what buyers in that specific community pay for it.

Finally, be wary of a number offered without a range. Any honest valuation carries uncertainty, and a presentation that hides it is selling confidence rather than analysis. The most useful CMA is often the one with the most conservative number and the clearest reasoning, because it is the one you can defend when a buyer's agent pushes back.