House Worth Estimator: AVM, CMA, or Appraisal?
Published by Cash Flow Deals · Last updated 2026-08-05 · Published and reviewed for compliance by Camilo Palacio, a Florida Licensed Realtor
Three tools estimate what your house is worth, and they answer different questions. An automated valuation model gives you an instant, rough number from public data. A comparative market analysis adds local judgment. A formal appraisal provides a valuation your buyer's lender relies on. When you're ready to compare actual offers, you choose between our Fast Cash Offer, where we buy your house as-is and close, and our Premium Cash Offer, where a pre-approved FHA or conventional buyer we already have, ready to go, pays more and buys directly from you.
| Factor | Traditional Route | Cash Flow Deals |
|---|---|---|
| Valuation method | AVM, agent comparative market analysis, or paid appraisal, each with its own margin of error | In-person or virtual walkthrough combined with local comparable sales |
| Cost to you | A formal appraisal commonly runs a few hundred dollars out of pocket | No cost for the walkthrough or the offer |
| Speed | AVM is instant, a CMA takes a few days, an appraisal takes one to two weeks | Often a written number within days |
Three Tools, Three Different Numbers
Ask three different sources what your house is worth and you'll likely get three different answers, and that's expected. Each tool is built for a different purpose, not to disagree on purpose, but because they weigh different inputs.
Automated Valuation Models (AVMs): Fast but Rough
An AVM pulls public records, tax data, and recent sales to generate an instant estimate. It's a useful starting point, but it can't see condition, so a freshly renovated home and a neglected one nearby can show similar numbers.
A Comparative Market Analysis (CMA): An Agent's Educated Guess
A comparative market analysis (CMA) compares your home with similar homes recently sold, currently for sale, or under contract, adjusting for differences like square footage, bedrooms, and lot size. It adds local judgment beyond an automated valuation model (AVM), but it remains an estimate of what your home might sell for.
A Formal Appraisal: The Number a Lender Trusts
An appraisal involves a licensed appraiser physically inspecting the home and documenting condition, upgrades, and comparable sales in a formal report. Lenders require this before approving most mortgages, which is why it carries more weight than an online estimate.
Why Condition Changes Everything an Estimator Can't See
None of the free online tools walk through your house. A new roof, an outdated kitchen, or foundation concerns can swing the real number by tens of thousands of dollars in either direction, information no AVM has access to.
Which One Should You Actually Use?
Use an AVM for a quick gut check, a CMA when you're seriously considering selling, and an appraisal once you're under contract with a lender involved. An actual look at your home lets us give you a Fast Cash Offer and a Premium Cash Offer to compare, and you choose. With either offer, the number is agreed before any work starts, and it changes only if you agree. The one exception: if something structural surfaces that was not visible or disclosed before we signed — foundation issues, hidden moisture, old wiring, cast-iron drain failure — we re-cost it and bring the number back to you. You decide. You can walk away. We disclose what we know at offer time so this almost never happens. We cover repair costs, and we figure out a way, so nothing comes out of your pocket. With Premium, only what the buyer's lender requires gets fixed, with those costs settled from the sale proceeds out of our share. With Fast Cash, we buy your house as-is, with no repairs for you to make. If the Premium buyer's loan falls through, that is our problem, not yours, and you can still choose the Fast Cash Offer instead of the Premium Cash Offer, at the Fast Cash Offer's own number.
Common questions
What is an AVM in real estate?
An automated valuation model, a computer program that estimates a home's value using public records, tax assessments, and recent nearby sales, without a human inspecting the property.
Why do Zillow and Redfin show different values for the same house?
Each company uses its own model and data weighting, so the same address can show different estimates. Neither is definitively right, they're both approximations built from public data.
Is a CMA the same as an appraisal?
No. A CMA is an agent's informal market analysis used for pricing decisions. An appraisal is a formal, licensed valuation typically required by a lender before closing.
Does an estimator account for a renovated kitchen or new roof?
Automated tools generally do not, since they rely on public records that may not reflect recent updates. A CMA or appraisal can account for it because a person actually looks at the home.
How often do online estimates update?
Most AVMs refresh regularly, often weekly, as new sales and public records data become available in a given area.
Keep reading
Related reading
What this means for your options
A value estimate is a starting point, not a guaranteed number.
Wait and see
Keep the property as-is and hope conditions improve. The mortgage, insurance, and upkeep keep costing money while you wait, with no set date for things to turn around.
List with a traditional agent
Standard MLS listing, typically 5-6% in commission, and a financed buyer whose deal depends on appraisal, inspection, and lender approval — any of which can fall through after weeks on market.
Sell to Cash Flow Deals
Two offers for your house, Fast Cash or Premium Cash, and you choose. Cash: Cash Flow Deals buys the house as-is and closes. Premium: More money. A pre-approved FHA or conventional buyer we already have buys directly from you.
See your selling options before you decide anything.