By combining a prefabricated recycled steel super-structure with concrete walls and insulated metal panels, architects Pamela and Hector Magnus built this stunning, charcoal-hued house with expansive second floor windows.  Photo 7 of 8 in 7 Coolest California Prefabs

7 Coolest California Prefabs

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By combining a prefabricated, recycled-steel superstructure with concrete walls and insulated metal panels, architects Pamela and Hector Magnus built this charcoal-hued house with expansive second-floor windows.