130 Majestic Oak Trees Inspired This Sleek Beverly Hills Home Asking $27.9M

"Given the natural beauty of the site, I understood that it would be important to make the relatively large house as diminutive as possible," explains Walker. "To achieve this, I placed two-thirds of the program below grade, and much of it under a vegetated roof. Because the house is sited on a ridge, the lower level was still able to have commanding views and vistas from nearly every window."