CMA, BPO, appraisal or AVM? How to tell which one a value request needs

KW Default Solutions

Last updated October 30, 2026

For agents who get asked for a value: what each of the four tools is for, and the one question to ask before you agree to provide one.

A CMA, a BPO, an appraisal and an AVM get tossed around as if they mean the same thing. Each one does a different job, and if you mix them up you can end up promising something you can't deliver. Here's each one in a line. A CMA helps price a listing or an offer. A BPO supports a client's loan or property decision. An appraisal is the formal valuation done under national standards. An AVM is a computer estimate.

This article is for licensed agents who are new to default-related work. KW Default Solutions (KWDS) trains agents to work with default-related sales. These four terms come up in short sale and BPO conversations all the time. A short sale happens when a home sells for less than the mortgage payoff and the lender agrees to take less so the sale can close. By the end, you'll know what each tool is and which one a request is asking for. You'll also see why they can land on different numbers.

01What are the four ways to value a home?

Here they are side by side.

Sources for the table: NAR [1], Fannie Mae [2] and the federal agencies' AVM rule [4], plus KWDS training for who each one is usually for.

CMA: the agent's pricing conversation

A CMA compares a home with similar sales to help a seller or buyer settle on a price. NAR describes it as generally used to give sellers or buyers information for a listing price or an offer price. [1] It's the one you already know how to build, and it's flexible, so it can be a quick check or a full presentation. It's built to help your seller or buyer decide. A lender or investor needs something different.

BPO: the opinion a client orders

A broker price opinion is a written estimate of what a property will probably sell for. A real estate agent or broker prepares it, with or without an inside visit. [2] Fannie Mae says BPOs are commonly used for quality control and loss mitigation, which means ways to limit a lender's loss on a loan that's in trouble. In default work you'll see them on delinquent loans, short sale offers and REO pricing. REO is a home owned by a lender or loan investor.

Servicers collect loan payments and manage the loan account. Asset managers manage and sell properties for a lender or investor. Valuation companies take orders from clients like these and pass them to local agents.

The client orders the BPO, so the order tells you what the report has to include. If you want the full walk through of an order, start with our guide to BPOs for real estate agents.

Appraisal: the formal one

An appraisal is a valuation by a person the state has licensed or certified, done under the Uniform Standards of Professional Appraisal Practice, or USPAP. [1] Appraisers are expected to give an independent analysis of the property's value. Lenders use appraisals for things like purchase loans and refinances, and a formal value is sometimes needed in a divorce, an estate or another legal matter. A real estate license on its own isn't that credential.

AVM: the computer estimate

An AVM is a computer program that estimates a property's value. The federal agencies behind a 2024 AVM rule describe AVMs as programs used for things like loan underwriting and portfolio monitoring. [4] They work from public records, past sales and sometimes MLS data. MLS stands for multiple listing service. They're quick and cheap, and they're honestly useful for a first look. They tend to struggle with unusual homes, and because nobody visits the house, they can't see its condition.

Think of an AVM as a quick first look. It can't see what the street looks like today or what shape the house is in.

That's also what's behind the "But Zillow says…" conversation. An online estimate like that is usually an AVM.

02Is there a rule of thumb?

Yes, with one catch: it's what usually happens, not a rule. Sellers and buyers usually get a CMA. Lenders usually get an appraisal. Banks, servicers, asset managers and investors usually get a BPO. And anyone with a browser can get an AVM, which is why your sellers keep showing you one.

Then come the exceptions. A consumer can order an appraisal. A court can need a formal value. A lender can use an AVM. And when someone is buying their main home with a mortgage, the lender can't rely mainly on a BPO for the value (more on that below). So treat who's asking as a clue and confirm the use before you decide.

That's why the first question is always what it's for. Professionals call that the intended use, which is the decision the value will support, and the intended user, which is who will rely on it. NAR says both have to be considered when developing any valuation. [1]

03Why can the four give different numbers?

Because they aren't always looking at the same thing. A few things can change the answer:

• The date. Markets move. A value built on older sales can miss what buyers are doing now.
• The data. A computer may lean on records and past sales. An agent can also study pending sales, active listings and the local market.
• Access. Someone who walks through the house can see what someone on the sidewalk, or a computer, can't.
• Condition and assumptions. Each tool assumes something about the home's condition unless it has evidence to the contrary.

Here's a fictional example. A house has an old roof and an air conditioning system that needs replacing. An AVM never sees either one, so it may price the house like its neighbors. An exterior BPO might note the roof from the street. An appraiser who goes inside might catch the air conditioning problem too. That's three different numbers, and none of them has to be a mistake.

Sometimes two professionals just read the same facts differently, and that's normal. So when two numbers disagree, ask what each one was built on. Ask it every time a lender's value on a short sale comes in higher than you expected. Check for wrong property facts, missing condition evidence, distant comparable sales (comps) and a market that has moved since the date the value is based on.

04What are the limits?

Know these before you take on any value request:

• Be honest about which one it is. A BPO has to make clear to the user that it isn't an appraisal. [1] Don't call a BPO an appraisal, or a smaller version of one. Depending on your state, doing that can also raise licensing problems.
• Federal law limits one use. When someone takes out a mortgage to buy their main home, a BPO can't be the main basis for the property's value when the lender makes that loan. [3]
• States can add their own rules. Some states limit who can prepare a BPO and what it can be used for. Your broker will know your state's rules.

None of this is legal advice, and a broker or an attorney is the right person to ask when the answer matters.

05Which one is this?

Four requests, all fictional. Decide what each one is asking for, then check the answers.

1. A seller you met last week asks what price to list at.
2. A valuation company emails you an order for a house. It gives you a due date, a fee and a form, and it wants your opinion of the probable sale price for its client.
3. A buyer tells you the lender needs a value on the home they're buying with a mortgage, and asks if you can write it up.
4. A homeowner texts you a screenshot of an online estimate and asks, "Is this right?"

Answers:

1. A CMA. Sellers usually want help choosing a list price, and the CMA is built for that.
2. A BPO. Read the order for the intended use, and check with your broker before you accept.
3. Not yours to write. The lender orders its own valuation, usually an appraisal by a licensed or certified appraiser, and a BPO can't be the main basis of value for that loan.
4. An AVM. It's a quick computer estimate, and you can add what it can't see: the street, the condition and the current market.

06Your next step

The next time someone asks for a value, ask what they'll use it for and write down the answer before you pick a tool. If the answer points to a BPO, or to anything you're not sure you're allowed to do, take it to your broker first.

07Where can you go deeper with KWDS?

Inside the KWDS community you'll find BPO training and a BPO companies directory. KWDS teaches the work. It doesn't supply orders, and it can't promise that any company will assign you one.

If a value request lands on your desk and you want a second set of eyes, reach out to the KWDS team.

Sources

1. Responsible Valuation Policy, National Association of REALTORS® (NAR)
2. Broker price opinion, Fannie Mae Selling Guide glossary
3. 12 U.S.C. § 3355, Broker price opinions, U.S. Government Publishing Office
4. Quality Control Standards for Automated Valuation Models, final rule, Federal Register (August 7, 2024)

This article is general education for real estate professionals. It isn't legal, tax or credit advice. State law, your brokerage's rules and the specific assignment decide what valuation work is allowed and how a report can be used. KWDS training is educational and doesn't replace client instructions, brokerage requirements or professional judgment. All examples are fictional.