The construction system for new housing here is standardized throughout the country, using standard length vertical studs in the walls, standard door and window sizes, standard (usually prefabricated) roof framing, standard heating, plumbing, electricity, etc. Houses built since the 1950s are surprisingly homogeneous. While building codes are controlled locally, they're based on national suggestions and don't vary much from place to place.

Some old houses are made of brick or stone, depending on regional tradition, but it's rare in new construction.