Each one here is composed of 3 modules, a center module and two wing modules that can be mixed and matched to produce a variety of buildings.

From left to right.
1. Apartment with generic shops on lower floor.
2. I had a little fun with this one. Shops signs related to theme from 1940 version of "You've Got Mail" called "Shop Around the Corner" with Jimmiy Steward. It's setting was Hungary.
3. Thanks to Sztartur for Hungarian names for Tailor and Shoe shop signs.
4. Large apartment or private home.