I have a 4 car attached garage, inbetween the garage is a breezeway that is also covered by the same roof. I would like to convert this into a master bedroom and a game room+ laundry area. What do i need to do first? Recently we had all our plumbing ran through the attic, with copper, and the water heater and washer dryer is in the garage currently. the walls in the garage are already drywalled and there is huge storage space in the attic that connects the garage to the house.