Abstract: An improved travel trailer chassis that has a main section, which is connected to the axles of the wheels, a first elevated section that is connected to a forward end of the main section and is elevated above the main section and a second elevated section that is connected to a forward end of the first elevated section and is elevated above the first elevated section. The first elevated section is configured to receive a floor and fixtures to support a bathroom. A trunk space for storage is defined by a floor that extends forward from the main section of the chassis underneath the first elevated section of the chassis. One or more sewage tanks are mounted to the first elevated section of the chassis immediately beneath and substantially adjacent the floor of the bathroom supporting the fixtures. A drain assembly extends through the trunk space to an exhaust positioned outside of the trailer.