If you’re looking to buy or sell a home in the Valley, do your homework. Author: Trisha Hendricks Updated: 10:44 AM MST February 21, 2021 PHOENIX — The hot real estate market in Phoenix has many homeowners thinking about selling, especially since the home value growth is up more than 15% since December of 2019. But Phoenix real estate agents are finding sites like Zillow, which use an Automated Valuation Model to determine a home’s value, are overestimating what a house is actually worth. How can you know a home value estimate is too good to be true? The median error rate of the Zestimate for on-market homes in Phoenix is 1.3%, Zillow spokesperson said in an email to 12 News. The company also clarified that Zestimates are supposed to act as the beginning of the home buyer's ezperience.