You don't have to have houses stacked on top of each other to achieve density. There are plenty of turn of the century streetcar suburbs in the US that are choc

You don't have to have houses stacked on top of each other to achieve density. There are plenty of turn of the century streetcar suburbs in the US that are chock full of detached single family homes but still have densities in the 10k/sqmi territory. It's only when you throw in minimum lot sizes, setbacks, wide streets, and minimum parking requirements that you take those single family homes and turn them into sprawl.