This residence is in a unique community in Marin County and is nestled between a stream and a steep hillside above. The renovation that transforms an existing residence extends and extrudes folded geometries of the existing roof to create a new open living, dining kitchen area with ample wall space for the owner’s art collections. The folded roof splits to bring clear-story light from the east, while creating intimate interior spaces. A new entry made of charcoal concrete board wraps around the foyer and creates a floating bench. The loft-like living space opens up to a new ipe deck that overlooks the stream below.