When I put in my address, the info is incomplete and the value is in no way correct. In reality, per a complete apprasal done just 3 weeks ago, my house is worth 575K. Without the sqft of my house and the number of bedrooms, this site has my house worth 473K. When I edit the field to put in the sqft of my home (it is missing), it says my house is worth 843K. Also, when I look at my fathers house, it says it is worth 685K with 3 brm and 2135 sqft. In reality, this house always had 4 brms and he has added in 200 more sqft to the house via a loft. When I put these changed into their "Zestimator" it says the value of the home is 564K. ***, you increase the size of the house and have another bedroom they did not count and your house is worth less. No way. They really need to get this info correct. I do know that they claim that the info is not accurate, but that will not stop some people from using it when they go to a realtor. I feel bad for the realtors that will have to give these people a reality check.
ETA that two of the homes that were used as comps to my house, do not exsist per this site.