I live in SF and the problem with housing here is that although the residential neighborhoods are very extended (think of the Richmond), most of the residential buildings are 2&#x2F;3 story houses that cannot accomodate many people.<p>We need to start replacing these little residential houses with 10 story buildings. There is nowhere else to build, we need to start upgrading the existing buildings.<p>Will that change the city? Well yes, but cities evolve and some of the houses built after the earthquake are anachronistic and of out place in this time.