> I live in Houston, where we don't have zoning, yet it's specifically cited (and I can confirm) that the vast majority of residents live in suburbs.
Houston doesn't have explicit zoning, which is true, but this doesn't mean that it's necessarily any easier to build dense housing if that's what the market demands.
- Deed restrictions effectively work as zoning by limiting what a given parcel can't be developed into, and they are city enforced; this restricts dense development, particularly in wealthy, high-amenity, high-convenience neighborhoods that might otherwise be more densely developed by natural forces.
- While Houston does not prohibit land uses anywhere, it does mandate a minimum amount of parking for various types of land uses and lot sizes. Mandated parking will drive up the cost of dense development because the minimums are set very high, and it means you either have to give over valuable floor space for parking, you have to build very expensive underground or structured parking, or a combination of the two. By indirectly driving up the cost of dense development, minimum parking regulations makes less of it pencil out.
If dense living was not in demand and undersupplied (which I believe it is), dense apartments would not fetch more per sq ft than a house in a low density suburb, at least not successfully.