We built a custom, water front home on Bainbridge Island, WA for a client in '99. Big home, 6br, 6 bath, with a 'mother-in-law apt over the oversized 2 car garage. The house was U shaped w/a oversized 2 car garage on one wing and an oversized 4 car garage on the other.
The client was a collector and owned four near priceless vintage/antique cars, a early '30's Alpha, a boat tail Auburn, and Maserati coupe, and a Ferrari Daytona (only one I ever saw was the '63 Ferrari Daytona 250 when it was being unloaded from the transporter, rest of the time they were all undercover).
The 4 car garage was every car guys dream 'man cave', ceilings tall enough for a lift, a seating area with a wet bar and custom cabinetry and a huge flat screen plasma tv and stereo system. There was radiant heat in the ceiling, as well the floor had radiant heating under imported 18x18 black and white marble, insulated walls all textured and everything was trimmed out. At the ceiling we coved out and had installed 16'' wide mirrors, angled toward the floors, it was wired for custom, adjustable lighting that shown up each space. We built in custom cabinets just like what was installed in the main house and work benches and the tops were covered with polished SS. Plus it had a small bath w/stool, urinal, shower stall and a changing room. There were if I remember right either 6 or 8 sky lights for natural lighting and the south facing wall had fixed, 16x48 windows all along the top of the wall just below the eaves.
I think that house just because of that garage is one of the best homes I ever built.