Promoting secondary units (in-law apartments)

With streamlined regulations, in-law units could boost East Bay affordable housing stock and economy, study finds

Adding secondary units like this is an extremely cost-effective way of providing affordable housing; the main reason it doesn't happen more is zoning regulations. The main zoning issue is parking, but street parking is not generally difficult to find in these areas. Adding units either in existing units' back yards or carved out of the existing homes should be promoted by the cities.