The River House, a fossil-fuel-free structure, sits on 1.1 acres on the banks of the Westport River in Massachusetts, commanding sweeping views to the south. The home’s solar crescent form allows for daylight to flood the interior. The home contains five bedrooms and accommodates large family conclaves with all interior surfaces like a fine cabinet, surrounding the occupants with rich, warm wood surfaces. The living spaces are framed by two-story-high glass enclosures opening to the sky to take advantage of the views and the horizon.