[crooked-v]

Philadelphia is another of the rare counterexamples, as the zoning there allows new row houses and townhouses almost everywhere.

[lukas099]

Philly is an old city. It probably already had townhomes everywhere, and would benefit from allowing further stages of density.

[xienze]

I don’t think townhouses are anywhere near as rare as you’re letting on. I’ve can’t recall the last time I haven’t seen them in any decent-sized (50k+) city.