There was just a Chronicle article on this https://www.sfchronicle.com/bayarea/article/San-Francisco-ADUs-are-being-built-mostly-in-the-16758730.php https://www

There was just a Chronicle article on this https://www.sfchronicle.com/bayarea/article/San-Francisco-ADUs-are-being-built-mostly-in-the-16758730.php https://www.sfchronicle.com/bayarea/article/San-Francisco-AD... Honestly, I agree with one of the quoted people that ADUs are just a political hack to get a half-measure by the NIMBYs. Even if we converted all the garages it would an extremely inefficient way to construct more housing. There was talk of trying to do financing for poor people to do the conversions, but insofar that that works I think it is likely to push up construction prices because ADUs are so inefficient. (Conversely, the externality of decreased parking is quite good. I don't want to neglact that.) If we really care about housing and equity for the poor, we should allow poor homeowners to trade in for a new condo if the entire block agrees, and then redevelop it at a massive scale. Far more housing, still equity for them, and once you bootstrap the process no one even need be displaced out of the neighborhood. Win-win