I'm sure things vary by state, but I think if you're careful, it's something you can easily get away with. As long as you don't need to have frequent visitors,

I'm sure things vary by state, but I think if you're careful, it's something you can easily get away with. As long as you don't need to have frequent visitors, aren't making tons of noise, and generally make it look like your apartment isn't a makeshift office, I'd probably be more worried about my landlord finding out than the zoning commission. Is commercial office space substantially more expensive than residential? I could see using a space you're living in as an office, but if the original tenant moved out because the office was infringing on his space/life, is it cheaper to maintain the residential apartment as an office or find proper office space?