I want to try my hand at developing geometry nodes generation of architectural buildings but have no information on actual common sizes of things. Where would I go to get this information? How wide is a store front on the first floor? How big are balconys (x, y, and z!!) in residential buildings? Is there a book of common sizes of things?
I would say thats covered by Building code rules and that varies from Land to Land and can vary within the country from region to region.
Asking library staff could help.