Maybe this is what is being referenced: https://www.quora.com/What-percentage-of-San-Francisco-apartments-are-under-rent-control https://www.quora.com/What-perc

Maybe this is what is being referenced: https://www.quora.com/What-percentage-of-San-Francisco-apartments-are-under-rent-control https://www.quora.com/What-percentage-of-San-Francisco-apart... Though, I don't think this is "rent control" in the NYC sense of the term where rents are kept way under market rate. Rather, it seems to be a set of ordinances around what landlords can and can't do, largely pertaining to rent increases: http://sfrb.org/rent-ordinance http://sfrb.org/rent-ordinance