Three reports estimate what a home is worth. They look similar from a distance — same data, same kind of analysis, same final number — and they have very different purposes, different people who prepare them, different costs, and different legal weight.
Getting them confused is one of the most common things new agents and first-time sellers do. Here's the practical breakdown.
The Quick Answer
- CMA (comparative market analysis): Prepared by a real estate agent. Free for the seller. Used to set a listing price.
- BPO (broker price opinion): Prepared by a real estate broker. $50 to $150, paid by the requesting party (usually a bank). Used to value distressed or REO properties.
- Appraisal: Prepared by a state-licensed appraiser. $300 to $600. Required by lenders for mortgage underwriting and legally accepted as the official property value.
If you're listing a home, you want a CMA. If you're financing a purchase, you'll get an appraisal. If a bank is making a decision about a distressed asset, they'll order a BPO.
What Is a CMA?
A comparative market analysis is the report a listing agent prepares to recommend a list price. It pulls recently sold properties similar to the subject, applies adjustments for differences (size, condition, features), and produces a price range plus a recommended list price.
For the full breakdown on how CMAs work and how to do one, see the complete CMA guide and the step-by-step CMA guide.
Key characteristics:
- Who prepares it: Licensed real estate agent
- Cost: Free — part of the agent's service to win the listing
- Time to produce: 60 to 90 minutes
- Used for: Pricing a listing, advising buyers on offer strategy
- Legally binding: No
- Accepted by lenders: No
What Is a BPO?
A broker price opinion is a more formal valuation prepared by a real estate broker (not necessarily a regular agent — typically requires broker-level licensing in most states). BPOs follow a standardized format mandated by the entity requesting them — usually a bank, asset manager, or insurance company.
BPOs come in two main flavors:
- Exterior BPO ("drive-by"): The broker drives to the property, photographs the exterior, and prepares the report without entering the home. Typical fee: $50 to $75.
- Interior BPO: The broker enters the property to assess condition. Higher fee, typically $75 to $150.
When BPOs are ordered:
- A bank is deciding whether to approve a short sale
- A lender is evaluating a distressed asset before foreclosure
- An asset manager is valuing REO inventory for disposition
- An insurance company is settling a claim involving property loss
BPOs are not appraisals and do not satisfy lender requirements for mortgage underwriting. They are an intermediate product — more formal than a CMA, less formal (and much cheaper) than an appraisal.
Key characteristics:
- Who prepares it: Real estate broker (state licensing varies)
- Cost: $50 to $150, paid by the requesting party
- Time to produce: 1 to 3 hours including the drive-by
- Used for: Bank/asset manager decisions on distressed properties
- Legally binding: Partially — accepted by the requesting institution for its internal decisions
- Accepted by lenders: No, not for mortgage underwriting
What Is an Appraisal?
An appraisal is the formal property valuation conducted by a state-licensed appraiser following federally regulated methodology (USPAP — Uniform Standards of Professional Appraisal Practice). Lenders require an appraisal before issuing a mortgage. The appraised value sets the maximum loan amount.
Three approaches an appraiser uses:
- Sales comparison approach. Same general method as a CMA — recent comparable sales adjusted for differences. This is the primary method for residential appraisals.
- Cost approach. What it would cost to rebuild the property from scratch, minus depreciation. Used more for new construction or unusual properties.
- Income approach. What rental income the property would generate. Primary method for investment properties.
Appraisals are far more detailed than CMAs or BPOs. The appraiser walks the property (interior and exterior), measures, photographs, and documents condition rigorously. The final report runs 25 to 40 pages.
Key characteristics:
- Who prepares it: State-licensed appraiser
- Cost: $300 to $600 for typical residential, paid by the buyer or borrower
- Time to produce: 3 to 10 business days
- Used for: Mortgage underwriting, divorces, estate settlements, tax appeals, complex valuations
- Legally binding: Yes, for the lender's purposes
- Accepted by lenders: Yes (required)
Side-by-Side Comparison
| Factor | CMA | BPO | Appraisal |
|---|---|---|---|
| Prepared by | Real estate agent | Real estate broker | State-licensed appraiser |
| Typical cost | Free | $50–$150 | $300–$600 |
| Who pays | Nobody (agent absorbs) | Bank or asset manager | Buyer or borrower |
| Time to produce | 1–2 hours | 1–3 hours | 3–10 business days |
| Report length | 5–15 pages | 5–10 pages | 25–40 pages |
| Walks the property | Yes (recommended) | Drive-by or interior | Yes (always interior) |
| Used by lenders | No | No | Yes |
| Used for listings | Yes | No | Rarely |
| Distressed-asset valuation | No | Yes | Yes |
Do the Three Reports Agree?
For a typical residential property in normal market conditions, a well-done CMA, BPO, and appraisal usually land within 5% of each other.
When they diverge, it's usually because:
- The appraiser has data the agent does not. Recent sales that aren't in the agent's MLS, or detailed condition assessment from the formal walkthrough.
- The agent adjusted optimistically. "Win the listing" pressure pushes some agents to recommend higher than the data supports.
- The BPO was a drive-by. Without interior access, the broker can't account for condition properly and tends to be conservative.
- The property is unusual. Luxury, custom builds, or properties with thin comps make all three methods less reliable.
When to Use Each
Use a CMA when…
- You're listing a property and need to recommend a list price
- You're buying and want a sanity check on whether the ask price is fair
- You need a free valuation and don't need lender-grade documentation
Use a BPO when…
- A bank or asset manager is making a decision on a distressed property (you generally don't request one yourself — they order it)
- You need something more formal than a CMA but don't need the cost or time of a full appraisal
Use an appraisal when…
- You're getting a mortgage — the lender will require one
- You're settling an estate, divorce, or tax appeal that needs a defensible legal valuation
- You have a unique property where MLS comps don't cover the situation well
One Common Mix-Up: AVMs
Zillow's Zestimate, Redfin's estimate, and RealAnalytica's AVM are automated valuation models — not CMAs, BPOs, or appraisals. They are algorithmic estimates with no human review, no property walkthrough, and no adjustment for condition. Useful as a free first-look. Not a substitute for any of the three reports above.
For the full CMA workflow including how it differs from automated tools, see our complete guide to CMAs in real estate and the step-by-step process for building one. For an honest comparison of CMA software options, see the real estate CMA software comparison.
Frequently Asked Questions
What is the difference between a CMA and a BPO?
A CMA is prepared by a real estate agent at no cost as part of a listing appointment. A BPO is prepared by a real estate broker for a paying client (usually a bank or asset manager), follows a standardized format, and is used primarily for distressed property valuations. BPOs cost $50 to $150 and are not accepted by mortgage lenders.
Can a CMA replace an appraisal?
No. An appraisal is a federally regulated valuation conducted by a state-licensed appraiser and is required by lenders for mortgage underwriting. A CMA is an agent's professional opinion. Even when the two reports agree on value, they are not interchangeable — lenders, courts, and tax authorities accept appraisals and not CMAs for official purposes.
How much does a BPO cost?
BPOs typically cost $50 to $150, depending on whether the broker conducts an exterior-only drive-by ($50–$75) or an interior inspection ($75–$150). The fee is paid by the requesting party — usually a bank evaluating a distressed asset, an asset manager handling REO inventory, or an insurance company.
Why do CMA and appraisal values sometimes differ?
Differences usually come down to data and judgment. Appraisers have access to public records and any non-MLS recent sales the agent may not have seen, and they conduct a more detailed property walkthrough. Agents sometimes adjust optimistically to win listings. In normal markets, the two reports usually land within 3–5% of each other; larger gaps signal one of these factors at play.
Do I need an appraisal if I have a CMA?
Only if you're financing with a mortgage — in which case the lender will require one regardless of any CMA you have. For sellers pricing a home, listing decisions, or buyers running a sanity check on an offer, a CMA is sufficient. The appraisal is a separate, lender-mandated step that happens after a purchase contract is signed.
