Protohaus is a 125 sq ft timber trailer home! ProtoHaus is a timber frame or `stick built´ house that was constructed with emphasis on sustainability, functionality, and aesthetics. It is fabricated primarily from recycled and reclaimed materials. A solar and wind system power the house allowing it to be off grid. The Protohaus is 22´ long and it’s 8´ 6´wide, making it 125 square feet inside without including the 9´ by 7´6" sleeping loft.