From the Michael Maltzan, the architect, in his description of the project
The project is a residence for two artists. Located 15 miles north of Los Angeles at the edge of Angeles forest, the site encompasses 6 acres of land originally planned as a hillside subdivision of houses designed by Richard Neutra. Three level pads were created but only one house was built, the 1952 Serulnic Residence. The current owners have over the years developed an extensive desert garden and outdoor pavilion on one of the unbuilt pads. The new residence, to be constructed on the last level area, is circumscribed by the sole winding road which ends at the Serulnic house.
The house has the form of a septagonal spiral, creating an unusually fragmented courtyard in the middle. Many of the rooms open into the courtyard and the outside rooms have protected windows, to keep the openess but provide privacy from the encroachment of LA.
The picture, and they have many more if you're interested, is from Architecture Lab