The problem with houses is if you just build - it won't solve anything. They have to be built in desirable locations. But then you've to either replace existing

The problem with houses is if you just build - it won't solve anything. They have to be built in desirable locations. But then you've to either replace existing buildings in there. Or you need to extend commuting infrastructure. And in either case you need to build/upgrade social infrastructure. Including workforce for it.