[Jim from C-Town]

I don't think they get any housing allowance at all.

Here is an article about dozens of legislators staying in their offices.

http://www.cbsnews.com/8301-503544_162-20027746-503544.html

Also I remember a story on the TV about Chuck Schumer and his three off four fellow Senates splitting a house to defray the costs of living in DC since they do not get an allowance. I know for a fact their isn't one benefit Schumer would ever turn down, so I think that there isn't an allowance for that.

[South40]

I don't think they get any housing allowance at all.

There isn't. But it's an honest mistake to believe there is. http://voices.washingtonpost.com/ombudsman-blog/2009/06/how_seeds_of_truth_can_sometim.html