Bay Area cities want to end single-family home zoning, but will it create more housing? FacebookTwitterEmail 1of12 The view from the rooftop deck of 247 27th Avenue in San Francisco, Calif. Thursday, February 25, 2021. There is currently a movement across the Bay Area to end exclusionary single-family zoning by allowing four-plexes on lots currently restricted to single family homes. The building at 247 27th Avenue is a four-plex on a single-family lot.Jessica Christian/The ChronicleShow MoreShow Less 2of12 The view from the rooftop deck of 247 27th Ave.Jessica Christian / The ChronicleShow MoreShow Less 3of12 The entrance to a fourplex at 247-249 27th Ave.Jessica Christian / The ChronicleShow MoreShow Less