Ways to Design with Circles

This home on a sloping hill overlooking downtown San Francisco features a number of innovative elements, such as operable porthole windows for ventilation, cut into the floor-to-ceiling glass wall on the east facade. The process of designing became “a project where we could play with ideas, not just a method of having a house made,” says homeowner Peter Russell-Clarke.

The LC4 lounge is by Le Corbusier, Charlotte Perriand, and Pierre Jeanneret for Cassina. Operable porthole windows on the east facade offer ventilation.