I would dare to say that you could use your original houses, a lot of material was shipped to the new world, and I mean a lot. Its a missconception that we only reciewed stuff from over seas, massive amounts of building materials and other comodities where shipped to the new settlements. Especially stuff that where in shortage naturally, and of course stuff that required industrial work not available in the new world (yet).
However, we went for a very warhammerish style to our pirate table, and its great fun to play on, and accordingly to others it looks good. We wanted a hollywood feeling to our games and hence where not afraid of making houses that included ship parts and so forth.
I am working on a smaller settlement, wich is my "private" pirate island, and all the buildings will be in a spanish style, sort of like the Tortuga table mentioned above. That village is one of my absolute favourites of all pirate tables I have seen, really great, lots of inspirational stuff.