So why is construction so expensive in bay area? 5000 sq ft McMansions can be built for under 300k elsewhere. Do we have too much regulation? Local labor is too

So why is construction so expensive in bay area? 5000 sq ft McMansions can be built for under 300k elsewhere. Do we have too much regulation? Local labor is too expensive? Too much permitting? A difficult environment to build in (inc. earthquakes)? I also disagree that the economics of fourplexes don't work. If they didn't work at all no one would build them. In addition, just opening up the option for them to be built should not cause any issues, even if it wasn't wildly successful in bring more units to the market.