I bought my house 3 years ago. I started tracking it on Zillow just last year, and it looks like it’s starting to creep back to its pre-housing crisis status (meaning a tidy little profit for me). But I have absolutely no faith in this website, its estimate, etc. - my house is only worth what someone else will pay for it. And with at least three other houses on my street for sale (some for over a year), that seems like a long shot at best at the moment (even in this so-called “stable” historical district).
To be fair, I’m not sure how something like this could really be all that accurate, and it uses all the information pretty well. For example, when I found the website, it had my house listed as having 2.0 baths when it is actually 1.5. I changed that bit of info, and the next month’s estimate dropped the price down a couple thousand.