The city’s firefighters have bought a Hamilton building for their union hall at 204 N. 3rd St., immediately north of Neal’s Famous BBQ, and will move there from their home in Hanover Twp. International Association of Firefighters Local 20 had been working on the sale since July and closed on it Tuesday for $122,000.“It’s a cool place,” said Tony Harris, president of IAFF Local 20, said he hopes an estimated $80,000 renovation can start soon, using union labor and firefighters themselves. “We’re excited for it.”It will have a meeting space in back, where furs used to be stored, and in the front open area, lots of old photographs, memorabilia and artifacts will be used to decorate.