There's varying levels, though, when it comes to infrastructure—at an extreme end, you might need to expand the road network to deal with increased traffic, and

There's varying levels, though, when it comes to infrastructure—at an extreme end, you might need to expand the road network to deal with increased traffic, and if that's building a new, parallel road, or doubling an existing one, that can get pricy fast. Of course, this is unlikely to affect anyone building a single property, but at least here if you're a developer building a large number of homes you can be expected to make a contribution towards to the cost of the infrastructure associated with the development.