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 a house is worth, and they answer different questions. An automated valuation model gives an instant, rough number from public data. A comparative market analysis from an agent adds local judgment. A formal appraisal is the number a lender will actually rely on.
| 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 CMA is built by a local agent pulling recently sold, active, and pending comparable listings, adjusted for differences like square footage, bedrooms, and lot size. It's more tailored than an AVM but still an estimate, not a guaranteed sale price.
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 A new roof, an outdated kitchen, or foundation concerns can swing the real number by tens of thousands of dollars in either direction, information no AVM has access to.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 listing, and an appraisal once you're actually under contract with a lender involved. If you want a number based on an actual look at your home without the wait, a direct offer serves a similar purpose.
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.
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What this means for your options
A value estimate is a starting point, not a guaranteed number. Our process tests your home against the real market -- real buyers, real comps -- before you commit to a price.
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
No repairs, no showings, no financing contingency on your side — our novation structure connects you with a bank-financed buyer at a price locked at signing. Usually within one business day.
See your selling options before you decide anything.