Coupled with low supply inventory, rising home prices and more people moving into the valley, there’s a new trend taking shape in Arizona, where residential properties are being built to rent out rather than sell. “It’s actually a fairly new form of residential real estate that really didn’t exist five or six years ago,” Randy Grudzinski with Empire Development Group told ABC15. The build-to-rent trend is mainly driven by demand, which, according to the Arizona Department of Housing estimates, comes to around 250,000 more homes and apartments needed right now in the state. Builders are constructing these new units all around the Phoenix Metropolitan Area, also known as the valley. There are 52 active build-to-rent communities with 165 more planned locations, according to the Land Advisors Organization, a large land broker in Phoenix. When looking at numbers across the country, there has been an increase of 30 percent build-to-rent homes …