There is one way that it would not solve the problem to build more housing. That way would be that most renters and homebuyers are basically irrational, or systematically overvaluing the location of their residence when better options exist. I would argue that this is actually the case in the SF Bay Area.<p>For example, I live in Pittsburg, almost at the very end of the yellow line (it recently got extended to Antioch). I work in SF making a decent salary. My commute is pretty long, nearly an hour one way, sometimes longer. My rent? Well, for a two bedroom, two and a half bath condo with a garage, porch, and backyard, it costs me roughly $2100/month, and we don't have rent control here. My rent has been raised only twice in the 3 years I've lived here, and only by about $50 each time. The same amount of space in San Francisco, by my best estimate, would cost somewhere between $4k and $5k a month. Also, that space would probably be in a much much older building, in a denser and more dangerous place than my town.<p>So, one could immediately ask, if I'm able to work in SF with an SF-commensurate salary, and pay this low in rent, why is no one else doing this? As far as I can tell, people even living in SF are very lucky to have less than a 30min commute one way. So I tack on an extra hour per day of commute, or, lets say, roughly 20-25hrs per month.<p>People do vary in their subjective valuation of a long commute. I probably do consider it to be less of a problem than most people. But do people really consider it to be worth <i>nearly $2k-$3k</i> a month? For someone making near what I am that would be more than my average hourly salary for time spent on the train. Again, people do vary in their respective valuations of time spent doing something other than optimally, but I would be surprised if it was worth that much.<p>Also consider that housing <i>is</i> continuing to be built on the other side of the mountains in the east bay, and that in Pittsburg and especially in Antioch it is possible to get a lot of space for very cheap, still. Its not unreasonable to expect transportation to get better over time, either.