What happens when a music executive’s family is torn between wanting a contextual home but also yearns for expressive, sculptural design? A chameleon home that morphs from street-facing suit-and-tie respectability to rear yard dancing-in-your-socks glee. Materials and geometries shift outside, but formality and curves are carefully knitted together inside. The family of four, big on entertaining and crammed into a tiny house, got a new second floor and 10’ rear addition. Unable to get wider on the narrow lot, we put the stair in the middle to create breathing room and to showcase part of their amazing collection of music on vinyl - right at the heart of the house. Now the narrow house feels broad and gracious. The stair's curving edges trace into adjacent wood floors, hinting at the curved rear spaces, where exuberance lets loose. The arced rear walls are gentle inside, but the curves connect strongly to the yard and revealed SF Bay views upstairs. Outside the swooping curves of building, deck, and balcony are dancing with each other in counterpoint. Even the metal railings and copper shingle siding are abstracted from the musical staff, adding new rhythms where the building and redesigned yard come together.