> "around 90% of the listing Zestimate is “Within 20% of Sale Price” of the home" Yes, this sounds pretty good to me. I spent some time trying to do something

> "around 90% of the listing Zestimate is “Within 20% of Sale Price” of the home" Yes, this sounds pretty good to me. I spent some time trying to do something sophisticated for the estimates on my site https://houseprices.io/ https://houseprices.io/ using repeat sales of similar properties weighted by distance, but I wasn't getting anywhere near that. I gave up and just used the Land Registry index for the county in the end. There are just so many potential local factors which you're never going to capture algorithmically, not least of which is how much the current owner might have spent doing it up. Although I do get the occasional irate message in my Contact Us form telling me exactly how much!