A comparative market analysis — usually called a CMA — is the standard tool agents use to estimate what a property should sell for. It compares your property with similar properties that have recently sold, are currently listed, or recently failed to sell, and uses those comparisons to suggest a realistic price range.
This guide explains the CMA process step by step, how comparable sales are selected and adjusted, and how to use a CMA without being misled by it. It builds on our guide on how to determine the value of a property, which covers valuation principles in general. This is general information, not a professional appraisal — for lending or legal purposes, use a licensed appraiser in your area.
What Is a Comparative Market Analysis?
A CMA is an estimate of market value based on comparable properties, usually prepared by a real estate agent. It is not an appraisal: it is less formal, uses similar evidence, and is typically free as part of a listing presentation.
A good CMA answers three questions:
- What have similar properties actually sold for recently?
- What are similar properties asking now, and how long have they been listed?
- What price range is realistic for your property, given its differences?
A CMA that only shows high sales and ignores low ones is not analysis — it is marketing.
The CMA Process Step by Step
A thorough CMA process follows these steps:
- Gather subject details: size, bedrooms, bathrooms, plot, age, condition, features, location
- Find comparable sales: recently sold properties as similar as possible, nearby
- Add active listings: similar properties currently for sale, showing asking prices and time on market
- Add expired or withdrawn listings: properties that did not sell, showing what the market rejected
- Adjust for differences: size, condition, features, location and sale timing
- Weigh the comps: give more weight to the most similar and most recent
- Suggest a price range: a realistic range, with reasoning, not a single optimistic figure
Each step matters. Skipping expired listings, for example, hides evidence that similar properties were overpriced.
Comparable Sales Selection
Comparable sales selection is the heart of a CMA. Good comps are:
- Recent: ideally sold within the last three to six months
- Nearby: same neighbourhood or a very similar one
- Similar: comparable size, type, age, condition and plot
- Arm’s length: normal sales between unrelated parties, not distressed or family sales
For plots, comps should also match zoning, permitted use, services and topography. A plot with planning permission is not comparable to one without it, even if they are the same size and nearby.
If truly comparable sales are scarce, a good CMA says so and widens criteria carefully — explaining the uncertainty, rather than pretending precision.
Adjusting for Differences
No two properties are identical, so adjustments bridge the gap:
- Size: price per unit of area, adjusted for usable space
- Condition: renovated vs original, with evidence from local sales
- Features: extra bedroom, garage, garden, parking, views
- Location: street, outlook, noise, proximity to amenities
- Sale timing: market movement since the comparable sale
Adjustments should be supported by local evidence, not rules of thumb imported from another market. An adjustment without evidence is a guess dressed as analysis.
Using a CMA to Price a Property
A CMA supports pricing, but it does not set the price alone. Consider alongside it:
- Your timeline: a faster sale may need pricing at the lower end of the range
- Market conditions: rising markets tolerate higher prices; falling markets punish them
- Property presentation: a well-presented property justifies the upper end; a poor one does not
- Appraisal risk: if a buyer’s lender appraises below the agreed price, the sale may fail
Our guide on how to price your home to sell explains how to turn a CMA range into a listing price. Price at the range the evidence supports — then let the market confirm it through viewings and offers.
CMA Mistakes to Avoid
Common CMA mistakes include:
- Using asking prices instead of sold prices as the main evidence
- Cherry-picking only the highest sales
- Ignoring expired listings that show overpricing
- Comparing unlike properties: different areas, types or conditions
- Adjusting without local evidence
- Presenting a single figure instead of a range with reasoning
If a CMA feels too good to be true, check its comps. The comps, not the conclusion, are the analysis.
CMA vs Appraisal: What’s the Difference?
A CMA and an appraisal use similar evidence but differ in formality:
- CMA: prepared by an agent, informal, usually free, used for pricing guidance
- Appraisal: prepared by a licensed appraiser, formal and regulated, often required by lenders, used for lending, legal or tax purposes
For selling decisions, a CMA is usually enough. For lending, legal or high-value decisions, an appraisal is the safer choice.
Frequently Asked Questions
How many comps should a CMA include?
Typically three to six sold comps, plus active and expired listings for context. Quality matters more than quantity — three truly comparable sales beat ten loose ones.
How recent should comps be?
Ideally within three to six months. Older sales need adjustment for market movement, which adds uncertainty.
Can I do my own CMA?
Yes, using public sold-price data where available, though agents have access to more complete records. A DIY CMA is a useful check, but professional input helps with adjustments and local knowledge.
Why do CMAs from different agents differ?
Agents may select different comps, adjust differently, or weigh evidence differently — and some may price optimistically to win a listing. Compare the comps, not just the conclusions.
Does a CMA guarantee a sale price?
No. It estimates what the market should pay. Actual price depends on presentation, marketing, negotiation and market conditions at the time of sale.
Final Thoughts
Comparative market analysis is powerful when done honestly: real sold prices, truly comparable properties, evidence-based adjustments, and a range with reasoning.
Ask for the comps, check them yourself, and price on evidence — not on the highest figure anyone will suggest. For more straightforward help, explore our property and investment guide. Explore more Plots & Land articles.
[…] inventory tells you, and how to use trends without being misled by them. It builds on our guide on comparative market analysis in real estate, which shows how local comparable sales turn market patterns into a price for one property. This is […]