Can I put up a modular home in Gainesville — like one of those new energy efficient prefabs — or is only stick-built allowed? I’m hoping to buy a small building lot in the 30501 or 30506 ZIP code. The city of Gainesville does allow for certain modular homes, ones that can be considered industrialized buildings.“We allow buildings that are manufactured off-site and then come in and the pieces are attached together and looks like a single-family residential home,” said Matt Tate, planning manager for the city of Gainesville in the Community Development Department.