I had done two of the 304 house. This is modular and makes some of the Fort Pitt Highrailer train meets. House and turntable done 4' X 8'. The "Y" module is 6ft wide and adds 5' length. Total length pictured is 13'
The 304 house has (3) stalls. As pictured (4) stalls, one additional stall, and the add on extension piece for locomotives longer than 30". Also pictures is the upgrade to a luan roof and gutters/down spouts. These details are part of Rich's build instructions.