Zestimate My House: What That Number Really Means
Published by Cash Flow Deals · Last updated 2026-08-05 · Published and reviewed for compliance by Camilo Palacio, a Florida Licensed Realtor
Zillow's Zestimate is an automated estimate built from public records, MLS data, tax assessments, and details homeowners submit directly. Zillow publishes its own error rates, and they run noticeably wider for homes not currently listed for sale. Treat it as a starting point, not a final number.
| Factor | Traditional Route | Cash Flow Deals |
|---|---|---|
| Data source | Public records plus an algorithm | A real, in-person look at your home |
| Error margin | Wider for homes not currently listed | No margin, it's a fixed written offer |
| What it's good for | A rough starting point | A number you can actually sell on |
How Zillow Calculates a Zestimate
Zillow feeds county tax records, MLS listings where available, and user-submitted facts like square footage or a recent remodel into a statistical model. The model looks at how similar homes nearby have sold and priced recently, then outputs a single number that recalculates on a rolling basis.
Zillow's Own Published Error Rate
Zillow discloses a median error rate on its own site, and it's meaningfully tighter for homes currently on the market than for homes that aren't. That gap exists because on-market homes come with fresh listing data, photos, and agent-verified details the model can lean on.
Why Off-Market Homes See Bigger Swings
Without an active listing, the model is working from older tax records and whatever comparable sales happen to exist nearby. A quiet stretch with few sales, or one unusual sale that skews the comps, can push your Zestimate noticeably off from what a buyer would actually pay.
Turning an Estimate Into a Real Offer
A Zestimate is useful for a ballpark, not for planning a sale around. If you want a firm number based on your actual property, Cash Flow Deals provides a written cash offer arranged through a licensed local broker partner, with the flat fee disclosed before you agree to anything.
Common questions
Can I claim my home on Zillow to fix the Zestimate?
Yes. Zillow lets owners claim their home and submit updated facts, like a renovated bathroom or added square footage, which can shift the estimate the next time the model recalculates.
Why did my Zestimate drop overnight?
A nearby home selling for less than expected, an update to public tax data, or a scheduled model recalculation can all move the number without anything changing about your actual house.
Does the Zestimate include renovations I made?
Only if you or your local records office reported them. Permits filed with the county tend to show up automatically; upgrades you never permitted usually won't unless you submit them directly.
Is the Zestimate the same as an appraisal?
No. An appraisal involves a licensed professional physically inspecting the home. A Zestimate is generated entirely by an algorithm with no one setting foot inside the property.
Keep reading
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.