They could use a scheme that allows numbering afterwards. In Brazil, houses are numbered based on how many meters they are from the start of the street (and odd

They could use a scheme that allows numbering afterwards. In Brazil, houses are numbered based on how many meters they are from the start of the street (and odd/even depending on the side of the street). The start of the street is the end closest to the city center. So you can have houses be demolished, built up, with the goverment burocracy aware of it or not, but you will always be able to number the houses afterwards, and the numbers will stay consistent.