I rented with a dog for ten years. I was very lucky in that the complex was extremely liberal, with no additional pet fees and no size restrictions. That is very rare (and they actually changed their policy while I lived there, but we were "grandfathered" in). My best advise to you would be to look at the larger complexes, they are more likely to allow in pets, simply because they have more apartments they have to fill.

The most common size restriction I have run into is 25 pounds, everyone likes to say under 25 pounds because they are less likely to break free from it's owner or cause serious injury to a human being (according to the complex owners, not necessarily the opinion of this writer or this board). It's mainly a issue of liability with the larger complexes. That is where the pet resume may come in handy. Peaches had her CGC, was well traveled and very well behaved (not to mention cute as a button ). When I was looking for a new place, only one complex said that they would not even consider any dog over 25 pounds.

I wish you the best of luck.