If you have a 1 km² (one square kilometer, = 1 million square meters) area. And the law dictates that only single-family houses can be built on it, with a minimum lot size of 500 m² each, then assuming 4 people per house, you can build 2000 houses in that area or house around 8000 people.
If you allow multi-family houses. Such as i live in one in Austria. Close to the city. The house has a lot size of about 1000 m² (with a big park in the middle), and 25 people live in it. If you build houses like that, you can house around 25000 people. More than triple!
thank you for your comment. just to add to it:
If you have a 1 km² (one square kilometer, = 1 million square meters) area. And the law dictates that only single-family houses can be built on it, with a minimum lot size of 500 m² each, then assuming 4 people per house, you can build 2000 houses in that area or house around 8000 people.
If you allow multi-family houses. Such as i live in one in Austria. Close to the city. The house has a lot size of about 1000 m² (with a big park in the middle), and 25 people live in it. If you build houses like that, you can house around 25000 people. More than triple!