Comparative Market Analysis (CMA): What It Is and How It Is Prepared

A Comparative Market Analysis (CMA) is a property valuation tool used across residential real estate transactions to estimate a subject property's market value by comparing it against recently sold, active, and withdrawn providers in the same market area. CMAs are prepared by licensed real estate professionals — not licensed appraisers — and serve as the primary pricing instrument for provider decisions, purchase offer strategy, and negotiation support. This page describes the CMA's definition, structural components, preparation methodology, and the boundaries that distinguish it from formal appraisal practice.

Definition and scope

A Comparative Market Analysis is a structured, professional opinion of a property's probable sale price based on the comparison of similar properties — commonly called "comparables" or "comps" — drawn from the same local market. The CMA is distinct from a licensed appraisal, which is governed under the Uniform Standards of Professional Appraisal Practice (USPAP), published by the Appraisal Foundation and required for federally related real estate transactions under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989 (FIRREA).

The CMA operates outside USPAP jurisdiction. It falls instead under the licensing framework of each state's real estate regulatory authority — for example, the California Department of Real Estate (CalDRE) or the Texas Real Estate Commission (TREC). State licensing statutes generally permit licensed brokers and agents to prepare CMAs as part of a brokerage service, provided the analysis is not represented as a formal appraisal. The National Association of Realtors (NAR) Code of Ethics, Article 11, further requires that REALTORS® provide services only within their field of competence — establishing an indirect professional boundary on CMA scope and representation.

The geographic scope of a CMA is hyperlocal by design. Comparable selection typically draws from properties within a defined radius — often 0.5 to 1 mile in urban markets — sold within the past 90 to 180 days, and sharing key physical characteristics with the subject property.

How it works

CMA preparation follows a structured sequence of data collection, comparison, and adjustment. The following breakdown reflects standard professional practice as described in NAR training curricula and state licensing education frameworks:

1. Subject property documentation — The preparer records the subject property's physical characteristics: square footage, bedroom and bathroom count, lot size, age, condition, construction type, and notable amenities or deficiencies.

2. Comparable selection — Properties are drawn from Multiple Provider Service (MLS) data across three status categories: recently sold (typically within 90–180 days), currently active providers, and expired or withdrawn providers. Sold comparables anchor the market value estimate; active providers reflect competition; expired providers indicate price ceilings the market rejected.

3. Adjustment analysis — Because no two properties are identical, line-item adjustments are applied to account for differences between the subject and each comparable. Common adjustment categories include square footage (often expressed as a per-square-foot dollar differential), garage presence, pool, condition, lot size, and location factors such as backing to a major road or proximity to a park.

4. Value reconciliation — Adjusted comparable values are reviewed collectively. The preparer weights comparables based on similarity to the subject, recency of sale, and market relevance, arriving at a probable price range rather than a single fixed figure.

5. Report compilation — The final CMA document typically includes a summary page, comparable data sheets, an adjustment grid, a net proceeds estimate (in provider contexts), and supporting market trend data. The real estate services providers provider network catalogs professionals operating across these service functions nationally.

MLS data access is a structural requirement of reliable CMA preparation. Access is governed by MLS subscriber agreements administered through regional associations affiliated with NAR, which maintains data standards through its MLS Policy Statement and the Real Estate Transaction Standards (RETS) and later RESO Data Dictionary frameworks (RESO).

Common scenarios

CMAs are prepared in 4 primary transaction contexts:

• Pre-provider pricing — A seller's agent prepares a CMA to recommend a list price prior to bringing a property to market. This is the most frequent CMA application in residential brokerage.
• Buyer offer strategy — A buyer's agent prepares a CMA to assess whether a provider price is aligned with market value and to inform offer amounts in competitive or negotiated situations.
• Relocation and corporate transfer — Relocation management companies (RMCs) often require CMAs from local brokers as part of home buyout or equity advance programs. These contexts involve heightened documentation standards set by the Employee Relocation Council (now Worldwide ERC).
• Estate and divorce proceedings — Attorneys and courts may request CMAs for preliminary asset valuation in probate or dissolution of marriage proceedings, though formal appraisals are typically required for final legal determination. Professionals in these contexts are verified within the real estate services provider network.

Decision boundaries

The CMA occupies a defined position in the property valuation hierarchy, and its appropriate use is bounded by regulatory and practical limits.

CMA versus licensed appraisal: A licensed or certified appraisal prepared under USPAP is required for all federally related mortgage transactions under FIRREA. Federal financial regulators — including the Office of the Comptroller of the Currency (OCC) and the Federal Reserve — enforce this distinction. A CMA cannot substitute for an appraisal in mortgage underwriting, federal tax proceedings, or eminent domain valuations.

CMA versus Broker Price Opinion (BPO): A BPO shares structural similarities with a CMA but is specifically commissioned by a lender or asset manager — typically in foreclosure, short sale, or REO disposition contexts. BPOs are subject to separate state-level authorization requirements. As of 2024, a subset of states prohibit licensed agents (as opposed to licensed brokers) from preparing BPOs for compensation (NAR BPO Resource). The CMA, by contrast, is a standard brokerage service generally permissible for any licensed agent.

Accuracy thresholds: Because CMAs depend on MLS data quality, local market liquidity, and the preparer's judgment in comparable selection and adjustment, CMA accuracy is positively correlated with market activity volume. In low-volume rural markets with fewer than 5 comparable sales in a 180-day window, CMA reliability diminishes materially — a structural limitation acknowledged in NAR's continuing education materials on pricing strategy.

The real estate services provider network purpose and scope describes how professionals preparing CMAs and related valuation services are classified within the national provider network framework. Further context on how to navigate and interpret providers in this sector is available at how to use this real estate services resource.