The Wedge is a small transportable cabin designed and built by WheelHaus. It is a park model trailer, built on a trailer chassis and registered as a recreational vehicle (RV). A park model trailer is typically used as a vacation cottage or small retirement home, but would also make an affordable home for a young single person or couple. Although they can be moved occasionally, park models are primarily designed to be left in one location and hooked up to utility services there. Because they are legally registered as RV’s, they can be placed in RV parks and mobile home parks. Park models in the United States are restricted by federal regulations to a maximum of 400 ft2 (37 m 2).