San Francisco firms Si?ol Studios and Levy Art and Architecture have updated this house in the city's Noe Valley neighbourhood with a gridded glass extension and two rooftop decks.
Called Valley Street, the Craftsman-style house was renovated by Levy Art and Architecture with interiors by Si?ol Studios for a couple who is passionate about art. One is a tech entrepreneur, and the other is a community organiser.

The team created the 3,280-square-foot (306-square-metre) home with a combination of industrial and bold details to be representative of art and technology.
Valley Street was extended with a three-storey construction with steel beams supporting black-framed windows. Glass doors on two levels break up the geometric pattern.

Completed in 2016, the renovation joins a number in San Francisco that contrast contemporary rear additions with the home's historic front. Also, as is common in the hilly city, the house can be accessed on its front and rear sides. These are at two different levels because it is built into a slope.

The main level is on the top floor and comprises an open-plan kitchen, dining room and sitting area, a bathroom and a bedroom.
A corner of the dining room is wrapped by the black gridded windows, and doors open onto a patio with glass railings. "The view is disciplined by a larger grid present in the delicate mullions that span the windows on this floor," the team added.

Interiors feature grey cabinets and a combination of black, cream, wo...