A free estimate built on official house price data for the US and UK, with every step of the arithmetic shown. If you know what you paid, we apply the real repeat-sales change for your own area over exactly the period you have owned it. That is how these numbers are supposed to be worked out.
No signup to see your estimateNo calls unless you askWe show the maths
1Location
2Purchase
3Property
We use this to place you in a market. We do not look up your property record, and nothing is stored unless you later ask for an introduction.
Or choose your location manually
30-year mortgage
6.67%
Freddie Mac survey, 2026-08-13
15-year mortgage
5.96%
Freddie Mac survey, 2026-08-13
US median sale price
$410,700
Census and HUD, 2026-04-01
Why this is not a Zestimate
The big portals produce a single number from a proprietary model and will not tell you how they got it. When it is wrong, and it often is, you have no way of knowing why. This works the other way round.
01
The method is the right one
The FHFA index is a repeat-sales index, built by observing the same houses selling more than once specifically to measure how one property's value moves over time. Applied to what you actually paid, it is not a workaround. It is the intended use.
02
Every step is shown
Your purchase price, your area's index then, your area's index now, the multiplier, the adjustments. You can check the arithmetic yourself and disagree with any line of it.
03
We say what we do not know
We have no parcel record for your house, no photographs, and no view of your street. Where that matters, the range widens and the page says why instead of projecting false precision.
We have no property records. No deed history, no parcel data, no MLS access, no photographs of your kitchen. We cannot pull up your address and tell you about your specific house, and we do not pretend to.
Comparable sales are not here yet. Recent sales on your street are the single strongest input to a real valuation, and that data is licensed. Until we license it, this is a market-level estimate applied to your inputs.
An index describes an area, not a house. If you gutted the place or let it go, your value has moved away from your area's average and no index will catch that.
This is not an appraisal. No lender will accept it. For a decision that involves money changing hands, get an appraisal or a broker price opinion.