Alright have a look.
Red: Floor, I'll probably leave it as whatever I build on
Black: Walls, of any kind (stone, glass, wood...)
Purple: Doors, any kind
Dark Grey: Fortifications
Green: Stairs up
Light Grey: Underground passage inside (for adventurer mode maybe, who knows)
Smugly Yellow: Trade Depot
So the idea is simple. A small town with lots of rooms which can be used for workshops, stockpiles and the likes plus a wide enough street for the dwarves that shall wander about. In the middle stands a tower of # floors above Z level (as in, as high as I care about building). On ground floor is the Trade Depot, on higher floors the higher class society will have their offices, special bedrooms and the likes. The lower classes live outside town, probably in the place I dig for stone (not too far from town then). The tower is surrounded by a wall, and the town itself with another. The small 3x3 sticking out at the left is the exit/entrance of the underground passage that leads outside of town (Again, probably for adventurer mode. To add some adventuring). The small squares with stairs on each side (up, down, left, and 2 right) are towers which will have militairy units on them for some pew-pew at enemies. The fortifications will have militairy units guarding the main entrance. Farm plots will be built next to the poor society's homes outside of town, since it's their job anyways.
So, comment I guess :s