When the public sector cannot solve the housing problem s/cannot solve/actively created/ Developers would build 100,000 housing units this year in the Bay Are

When the public sector cannot solve the housing problem s/cannot solve/actively created/ Developers would build 100,000 housing units this year in the Bay Area, that would sell for double the national median housing price, if it were legal for them to do so. Zoning and land use restrictions are the cause of high housing prices in the priciest cities. Those are legal, not market or technological, restrictions.