There was a Post article about a small houseboat community somewhere on the River in DC. Probably in the last year, you can maybe search on the Post website.
Anonymous
10/25/2013 16:18
Subject: Living on a houseboat
Hi Everyone, Anyone here currently or recently live on a houseboat. An actual house on the water, not a boat used as a house. Where in DC metro might I find such a place to rent or purchase?