California with noteworthy rental housing laws and regulations:

Northern California

Alameda
Berkeley
Concord
Hayward
Mountain View
San Francisco
Oakland
Palo Alto
San Jose

Southern California

Bakersfield
Baldwin Park
Beverly Hills
Burbank
Chula Vista
Glendale
Inglewood
Irvine
Long Beach
Los Angeles
Oxnard
Pasadena
Pomona
Riverside
San Diego
Santa Ana
Santa Barbara
Santa Cruz
Santa Monica
West Hollywood

Central Valley

Sacramento
Fresno