$3500-4000 for a 1 bedroom is common, (I rent one) but it's also probably in a nice, modern, new-construction building. Mine is 15th floor with a view, so it's more than the bare necessities. Buildings like this have the best marketing budget, so you see them all over the internet. The less developed and less expensive areas will have a longer commute. You could live in the east bay and ride Bart in e.g. at $11 per round trip from Berkeley. Your company may provide a transit benefit so you can spend pre-tax dollars on your commute.