Even steel frames are unnecessary in a lot of cities with a housing shortage. A cheaper wood frame can get you up to 5 stories at a fraction of the cost. I'd sa

Even steel frames are unnecessary in a lot of cities with a housing shortage. A cheaper wood frame can get you up to 5 stories at a fraction of the cost. I'd say a bigger problem is local low-density zoning restrictions, where it's legally prohibited to build more than one or two units per lot.