Hand-built by students of the Heartwood School as part of a traveling workshop program, this timber post-and-beam incorporates resource-efficient materials, super-insulated techniques and passive solar design. Located in Washington, the two-bedroom, two-bathroom house is open plan so the living room, dining room and kitchen flow into one another. Cathedral ceilings and skylights ensure a light-filled and spacious environment. The home is surrounded by gardens, trees and lawns. Listed for $336,500 by Benchmark Real Estate.