With parking requirements, families who don't have/need/want a car still have to pay the extra price for a built-in feature they don't need. When we bought our first home, it was a condo in SoMa without car parking. We loved it because we didn't want or need a car, and we couldn't have comfortably afforded a place with parking included. Especially in metropolitan environments, minimum parking requirements are the near the core among the reasons many things don't work well (public service, street safety, runaway home prices...)