Comment by prawn

In Australia, as zoning changes, developers and owners alike tend to take advantage. If a house was being rented out, they might rebuild as 2-4 homes and rent those out. Otherwise, an owner might rebuild as two semi-detached homes, live in one and sell/rent the second to finance the build. If it is owned by someone who prefers to keep what they have, the next generation might not feel the same. Where there are opportunities, developers (and owners) will find them.