20th St is a residential project designed by Mork Ulnes Architects in 2011.
The 1,620-square-foot home is located in San Francisco, California, USA.
20th St by Mork Ulnes Architects:
“This renovation represents unconventional materials’ capacity to elevate a project otherwise constricted by a tiny budget and planning scrutiny.
With an imperative to create an impact on the exterior but remain within the city’s preservation and zoning requirements, a matte black cladding, typically used on skateboarding ramps, wraps the house’s existing two-levels.
The residence’s social functions are relocated into a vertical penthouse addition with sweeping views. A hand-drilled, operable steel screen doubles as an awning and diffuses light to imbue the penthouse with a playful atmosphere.
The same hills that poise the residence to have panoramic views also create a notably steep backyard. This sectional condition is celebrated as it enables a connection directly from the third floor to the back garden via a steel catwalk.”

Photos by: Bruce Damonte