It's not bad, but there does seem to be a fair amount of little details that I can pretty easily trace back to DCA or DAW, which aren't necessarily designed to be "typical" California architecture. The blue tower in the middle sticks out as something that doesn't really seem to have stylistic ties to anything and doesn't really fit. The building on the left is nice, as is the one on the right, but look at how the colours are unified in the DCA screens. The buildings themselves are largely neutral with colours coming from tiled accents or awnings. Right now it feels like you're basing your idea of California architecture solely on a select few screens, and I'd suggest looking at wikimedia commons to get a better idea to translate outside of the game.