Floor area per resident, m² (for the population estimate).
Chance (0..1) that a pitched-roof house has a chimney.
Storey height per style, metres.
House depth range, metres.
Residential buildings with at most this many floors are houses.
House width range along the street, metres.
Chance (0..1) that a block or tower top floor is set back (a penthouse).
Most rooftop plant boxes on a flat roof.
Share (0..1) of industrial sheds with saw-tooth roofs.
Gap kept between neighbouring buildings outside downtown, metres.
Buildings with at least this many floors become towers (with setbacks).
± random variation of floor counts (fraction).
Building rules.