My neighbour built a new house on the site of a former 1930s bungalow.
The garage is integral with the house, which has underfloor hot water heating.
The garage, which has access directly to the utility room, has cavity walls, insulated and the windows are double glazed.
Of course, the garage has its own zone on the under floor heating system.
Andy is into classic motor scooters and said, "any idiot can sit on a cold concrete floor...I'm too old to be that idiot!". Quite!