im growing in a apartment with a 600w and a t5, vented into the attic which is sealed throughout the building. there are no exhaust vents in any of the apartments for smell to seep down into other apartments. the exhaust will escape through the ventilation on the roof, and i use a carbon filter. just make sure you have renter's insurance in case anything go awry. i'm not too worried about the legality as i'm medical, and i'm not worried about eviction either. just make sure you balance your load on the circuit breakers, took me about 15 minutes to map every plug in the apartment to the corresponding breaker. i split my load between two circuits just to be on the safer side, though when i had everything going at once on one circuit it was fine. i would really like to go all out in the second bedroom, but that's my g/f's scrapbooking room, and she would pitch a bitch no matter that i could rock many 1k's in there. i agree with what fred said, keep your other power consumption to a minimum, it is good practice anyways. switch out to low watt cfl's and keep things youre not using off. though even if your bill was slightly larger than typical it doesnt mean shit. for all anyone could know you could have a bunch of aquariums.
edited to add:
also, about possible fire inspections, put a lock on the door to your grow and keep it locked. your fire alarm should be somewhere in the main hallway anyways, so if they come around for an annual they shouldnt even need to go near your grow.