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Houses have traditionally always been small. Even up to the last hundred years, it was rare to see a house bigger than 2 bedrooms, and those bedrooms were small. Usually only one bathroom as well. Multi-story houses were usually reserved for those with servants, or farmhands employed around the farm.
I don't think there is currently anything official, but if it were me, I would say:
Poor home = probably 1 large room with a hearth. Maybe something hung from the ceiling to separate the children's sleeping area, if it's a multi-generational home
Comfortable home = 1 large room for the common areas (kitchen, eating, reading) and 1-2 separate bedrooms. Usually 1 for adults and 1 for kids.
Quality home = Many rooms. This would have a dining area separated from the kitchens, and a nice sitting/entertaining room. This home would probably have servant's quarters either on a higher floor. Would certainly have separate bedroom for the owners of the house, and enough bedrooms to separate girl and boy children.
Fine home = Reserved for the rich. This kind of home would be made for entertaining. Kitchens separated either in the basement or in a separate building, a nice drawing room, maybe a library. Bedrooms on the second floor and servants quarters on the third. This kind of home might have a nursery and/or a separate staircase for the servants. The house itself is probably more function than form, but well decorated.
Luxury home = This is what we would consider a historically fancy house. The kind of houses built by the ruling class to flaunt their wealth. This kind of house may be set up similarly to a fine home, but with carved railings, sculpted columns, and other architectural details that are highly adorned.
I know that you're looking for something for official than a GM ruling, but I feel that this has a lot of historical grounding.