[eschaton]

Terraced housing is not unique to England. In the United States, we call them rowhouses of course, and while they are only dominate the urban vernacular in Philadelphia and Baltimore they can be found in a wide swathe of the country where 19th century urban housing survives. Outside the U.S. they're common in parts of Canada (particularly Montreal), Australia, Malaysia, and Singapore.

What might be unique is the degree to which the UK kept to attached housing styles even in the late 20th century. In the U.S. even Philly and Baltimore finally gave up on large-scale attached housing developments in the 1950s. From my limited experience with British suburban housing typologies, it seems like attached (or at least semi-attached) remain the preferred style of suburban housing even today.