[LDiCesare]

I believe at the time houses were still mostly tight two-three storey wooden buildings with different families living on each level, having one or two room. I know in Paris until the 19th century people mostly lived outdoors because it was too crowded inside. Kitchens and bedrooms would probably be the only kinds of rooms, except for richer places, which could be mansions with lots of rooms, including separate stairs for the nobility and the stairs for the servants and bathrooms. Water closets were outside.

Regarding random world generation, if you're interested, I could try to adapt something I did for you. Mountain ranges are workable, although I never thought of gulf detection algorithms.