“Hold on, I’m walking into my office now,” Frank Norton Jr., president and CEO of The Norton Agency real estate firm in Gainesville, said over the phone last Friday. He wanted to sit down and really think the problem through before going on. Norton said he’s been “knee-deep” navigating the city’s building codes as he develops a cottage home community off Enota Avenue, which he hopes will be a start in addressing the city’s need for in-town rental housing at affordable rates.