Create floorplan from rooms with specific number

[maciek.glowka]

you could try to get all the boundary vertices and apply some kind of alpha shape algorithm…see below:

Concave Hull (Alpha Shape) from list of points with Python?

Sorry, I don’t have anything better. The only alternative is to use a while loop / goal seek type of approach, where you try to minimize the alpha size, while still producing a single continuous external loop.