Paris also has a density more than <i>three times</i> that of San Francisco, and we don&#x27;t need to go nearly that high to solve the problems we&#x27;re facing right now. There are a great many people who want to live in denser districts, which is evidenced by the fact that the districts with high density have the highest rents. If low-density districts were more desirable, you&#x27;d expect to see them more expensive, but the most expensive area of SF (for renting) is... FiDi.<p>If the city were to become unpleasantly dense it would be evident in people&#x27;s actual, chosen aggregate preferences.<p>But raldi hasn&#x27;t really touched on the situation, in my opinion: much of the city is not only limited by height, but by the number of units per building, usually to 2 or 3. It&#x27;s not the end of the world to raise that to 8 or so.