yeah u can get grage space too but it take a long while of looking, i have garage spot a block from my house but its only for parking no working on bikes.
most garages for working on bike we get kicked out of.
u can find places as ben said that have small areas for working on/storing bikes, but yeah say goodbye to the space and freedom of a suburb garage.
I lock my bikes on the street often, they are usually fine depending on the hood ur in. they suffer the random busted plug from a crack head but its not bad. but i also pawn them off on my friends with space and garages, if ur serious into peds u need to find a place to work on ur peds and store them, this is VERY difficult to find.
ur best bet is to look for a place that will have space for a ped off the street some in a hood that's not gonna care or have it be stolen likely.
u could move out to sunset district if u want a definite space fro a ped but its always cold and foggy out there, and takes a long time to get into the city but ur close to the beach.