Home value estimates
How far off is the Zestimate?
An automated estimate is a useful starting point, but it is blind to your home's condition and can be well off, especially for a home that is not currently for sale. The fix is not one number, it is a comparison. See your estimated market value next to a real cash offer for your specific home.
The model
What the number really is
A Zestimate is Zillow's automated estimate, built from public records and the data it can gather at scale. It is genuinely useful for a quick read, and Zillow is transparent that it is a model estimate, not an appraisal. Zillow even publishes its own median error rate, and that error is notably larger for off-market homes than for homes actively listed. In other words, the estimate is at its weakest for exactly the home most owners are curious about: their own, when it is not for sale.
The blind spots
Why estimates miss
- It cannot see inside. Condition, layout, updates, and deferred maintenance are invisible to an automated model.
- It leans on comps. Thin or mismatched nearby sales pull the number in the wrong direction.
- It can be stale. A model is only as fresh as the last data it ingested, which lags a fast-moving market.
- It cannot price the unusual. A view, a busy road, a rare floor plan, or a recent renovation are hard to model.
The comparison
Estimate, appraisal, and cash offer
These three answer different questions. Knowing which is which is the whole game.
Automated estimate
Instant, free
A model built from public data
Blind to your home's condition; wider error off-market
Appraisal
Days, paid
A licensed appraiser, in person
Accurate but slow, and a snapshot in time
Cash offer
Fast, free to see
What a real buyer will pay today
Trades top-of-market price for speed and certainty
The fix
The more accurate move: compare, then anchor to a real offer
No single automated estimate is the truth. The way to get close is to see the range from more than one model, then anchor it to what a real buyer will actually pay. That is what we do: enter your address and we show your estimated market value next to a no-obligation cash offer for your home, so you can see the spread between a model and the market in one view. Free, and you are never locked in.
Questions
Questions about home value estimates
What is a Zestimate?
A Zestimate is Zillow's automated estimate of a home's value, computed from public records, tax data, and user-submitted details. It is a free starting point, not a licensed appraisal, and Zillow itself describes it as a model estimate rather than a guaranteed price.
How accurate is the Zestimate?
Zillow publishes its own median error rate, and it is meaningfully larger for off-market homes (the vast majority) than for homes actively listed for sale. The reason is simple: an automated model cannot see your home's interior condition, recent renovations, or unusual features, so it can be off in either direction. Treat it as one data point, not the answer.
Why is my Zestimate wrong, too low, or too high?
The common causes are stale or missing sale data, no view of your interior condition or upgrades, thin comparable sales nearby, or features the model cannot price (a view, a bad layout, a new roof). Any automated estimate inherits these blind spots, which is why comparing more than one, and then getting a real offer, matters.
Zestimate vs appraisal vs cash offer: what is the difference?
A Zestimate is automated, free, and instant, but blind to your home's condition. An appraisal is a licensed professional's in-person opinion, accurate but slow and paid. A cash offer is what a real buyer will actually pay for your home today. We show your automated market estimate next to a real cash offer so you can see the spread between a model and the market.
How do I get a more accurate home value?
Compare more than one automated estimate to see the range, then get a real offer to anchor it to what a buyer will actually pay. Enter your address and we show your estimated market value next to a no-obligation cash offer for your specific home, free and with no obligation.
Next step
See your real value
It starts with your address. Two minutes, free, no obligation. Thinking about selling? See how to sell your house fast.
Zestimate and Zillow are trademarks of Zillow, Inc. Home Value Pros is not affiliated with, sponsored by, or endorsed by Zillow. This page is independent commentary and comparison.