Big Mouth House was developed by Hybrid Architecture, led by Rob Humble in collaboration with Kailin Gregga of Best Practice Architecture and sole practitioner Steven Lazen. The team transformed a 5,760-square-foot single-family lot in Seattle's Central District into three dynamic townhomes.

Each three-story unit contains an Accessory Dwelling Unit (ADU) at the lowest level that can be used as an extension of the home or as a separate rental apartment. The ADU can be accessed from a separate exterior entrance or through an interior lockable door, providing the primary resident the flexibility to determine its proper function.

The second level houses two bedrooms and one bathroom, distinguishing the more private areas of the home. The third level holds the living and dining rooms accompanied by large windows that frame views of the surrounding urban landscape.

Open rafters articulate the ceiling structure and give the space an added degree of height and depth. Black vertical metal cladding wraps the exterior of the architecture providing a base color contrasted by the custom pink powder-coated accent panels around the windows and railing. Entry doors also contrast the dark base with vibrant color treatment. The rooftops carry the contrasted color theme with an expansive geometric mural painted by Seattle-based artist Sam Wood Wilson.