The new penthouse, atop an existing, three-story home, takes advantage of breathtaking Bay Area views. While the interior space is compact, continuous surfaces and heightened transparencies carry the eye outward, creating a feeling of expansiveness. The glass walls open in two directions under a deeply cantilevered roof allowing both intimate gatherings and larger festivities. The glassed-in space features a kitchenette and can be used year round. The terrace's hot tub and bbq enhance entertainment possibilities.