Treehouse – In Callao Va, Near the Confluence of the Potomac and Chesapeake Bay.  864 sq ft cabin on a wooded ravine.  Effectively functions off-grid and net-positive energy with PV’s on a nearby boatshed roof and an above ground cistern. The cabin sits on round cast concrete piers, overhanging a ravine, with the deck extended out between existing trees.  A 12′ square grid offsets vertically to form covered outdoor spaces below upper lofts.  The metal roof is folded, like a geometric leaf, funneling all rainwater to the above ground cistern.  Reclaimed sugar maple and walnut clad the interior walls and form steps/shelves.  No drywall or paint. Builder: Ed Larkins Photos by Ashley Twiggs