And make sure all electrical outlets are above all the sewing machine tables. Mine are just about 6 inches or a foot above all the table. So as they don't get covered up. Mine is 12 x 14; I had it added on before I got my long arm. NO room for it in the sewing room which is too small. I wish now I'd enclosed the 2 car garage and added the garage on. I'd say a 2 car garage size would not be too small. Like the others have said, you cannot have too much room.