I did this a little in reverse and did the shell first in real brick and then designed it in LDD. Anyway, this is a 16x32 Fire Dept Building. It is designed as a stand alone building but also can be for an add-on building for the Lego City Fire Station Set 7945-1 and has the rear of the building set up with the "connector" bricks.
A 32x32 building would of course double everything but that will be later.
I tried to put a lot of detail into this even though the size brought some limits to what could be done but here is what I came up with.
The first level has a front desk and chair, stairs to upper level, and lots of storage type cabinets under the stairs.
The upper level has a balcony, a small kitchen with my special three door red fridge, an upper and lower cabinet, sink, lights over sink, oven, burners, range vent hood, round table and four stools. For the living quarters there is a separate door, an enclosed shower, an enclosed toilet and sink, two sets of bunk beds, two sets of storage type cabinets with doors and drawers. Lots of windows. Removable roof.