California has amongst the most extensive urban sprawl in the entire country, so it's strange to think of it as a place where zoning and property restrictions restrict supply. LA is world-famous for its urban sprawl and car culture! And in the Bay Area, you can drive from Millbrae to Gilroy while going through nothing but endless suburbs for 65 miles. Meanwhile, Portland has super-restrictive growth and zoning policies, and is much cheaper. So I think there are more factors at work.