Zoodiver does bring up a good point about weight restrictions. When I did rent and owned the 265 I was in a townhouse with a concrete slab...mainly why I didn't ask the landlord. I am also a landlord myself now and actually have a provision not allowing tanks over 100 gallons due to weight issues, but the rentals I own are rehabbed older homes otherwise I wouldn't care (fish don't piss all over the place like cats and dogs that are not properly cared for). Also do carry renters insurance. Your landlord has no legal grounds to kick you out for a big tank unless it was specified in the lease, but you certainly are responsible for any damages it may cause.Talk with them and be up front. There might be a VERY good reason you can't have one, and it could come back to bite you in the end. There could be weight restrictions (even on the first floor) where the building just can't take the small footprint with such a massive amount of weight. If anything happens (like a stand failure), you'll be on the hook for the damages. They may require renters insurance or prohibit anything above a specific gallon size. Being up front and honest protects yourself and shows you are worth having as a renter.
If you're referring to keeping a tank in an unfinished basement then check out my 180, in the link in my sig. Its in an unfinished/unheated basement.........and I'm in New HampshireI might look into that but might get a bit cold for that in the winter.