My grandparents house built just after ww2 had, what was for a long time, a standard two car garage. Enough room for two land yachts from the 70s, lawn care implements and various other stuff and you could still open the car doors all the way and walk around. My parents' house built in the 70s was the same. It's more recent construction in built up areas where they are shrinking. They've been getting smaller as developers try to cram more liveable sqft on smaller amounts of land.

Sure, though the UK has a much larger proportion of those old houses than the US.