It was hailed as the official end of single-family zoning in California and decried as a threat to suburban neighborhoods.  But two years later, Senate Bill 9 has done little to add new housing, despite a desperate need for it. But a growing number of developers have emerged with an offer: cash for your backyard.Reporter: Erin Baldassari, KQEDNearly 500,000 fast food workers in California start earning at least $20 an hour on Monday. But some restaurants have already started laying people off in response to the change.Reporter: Farida Jhabvala Romero , KQED Learn more about your ad choices. Visit megaphone.fm/adchoices