[kelnos]

I don't think of this as a matter of politics in the traditional "left vs. right" sense. Merely that a lot of homeowners in SF have an "I got mine, screw you" attitude that extends into policy decisions in order to protect and increase the value of their property. It's conservative only in the literal meaning of the term, that they're resistant to any change that they fear could cause their home values to decrease. I expect this phenomenon is quite bipartisan in general, but yes, obviously there are more people on the left than right in SF, so likely many "liberal" people are "conservative on housing".