SPG Architects transformed an abandoned steel frame and concrete slab structure into a five-level, 18000 SF, indoor-outdoor residence on a rain-forested mountainside overlooking the Golfo Dulce.

This house’s total usable area sits on approximately 6000 SF of forest floor, and the 18000 sf of this indoor/outdoor house is spread over 5 levels. The owner preserved more than 100 acres of developable rainforest and built on far less than 1 acre. In addition, the structure was existing and abandoned when first visited by the architects and was strengthened for seismic loads, modestly reconfigured and re-used.  More pics here.