Staircase, Metal Railing, and Metal Tread The owners shared Turnbull Griffin Haesloop’s dedication to green design, and agreed to modifications—like solar panels and passive heating and cooling elements—to earn the property LEED Platinum certification. The living room’s oversized fan is by Big Ass Fans. Ultra-Tec created the cable system on the stairs and guardrail.  A LEED Platinum Family Home Takes the Place of an Abandoned California Farmhouse  by Kelly Dawson