One Steuart Lane

One Steuart Lane is an elegant example of a design/build stone-clad curtainwall and stone assemblies. The design of the facade gradually evolved over two years through an ownership change. Once the design-assist process formally began with SOM, three key design elements emerged for the 20-story residential tower’s enclosure: monumental dimensional stone framing, floor to ceil­ing glass, and minimal exposed metal. Dozens of stone types and thicknesses were considered, along with numerous configurations of the terrace floors during this phase until the final design was settled. There was extensive structural and fire­stopping engineering as part of the design work required in support of the owner’s efforts through permitting.

Enclos designed, engi­neered, and installed the 140,000 square feet of scope, including curtainwall, entrances, storefronts, balconies, sliding glass doors, terrace assem­blies, aluminum coping, and wall panel systems. On the ground floor, several notable features include a 24’ tall glass main entry, a point-supported glass canopy supported from glass fins, a custom wood door with cast glass blocks within a bronze portal frame, blackened stainless steel panels, stone cladding systems, and stone baguettes. All systems have tight tolerances to achieve a sophisticated building enclosure.

A statement entrance of structural glass and a monumental wood door is sheltered with the cantilevered glass-fin supported canopy.
The 17′-10″ wide glass canopy at the main residential entrance comprises two 8′-10″ x 16′-2″ lites that are 1.75″ thick with a custom banding of frit on multiple layers. Four mechanical inserts laminated into the glass composition attach the horizontal lites to the glass rafters above.
Two glass rafters supporting the canopy from above are comprised of 2.2″ thick glass beams that are 15′-4″ long and create a 12′-8″ cantilever, extending the glass 11′ beyond the vertical face of the building.
Photos 2-6 Courtesy of Dave Burk © SOM.



Facade Area:

140,000 sq ft


San Francisco, CA




240 ft


John Buck Company, Paramount Group, SRE Group Limited

General Contractor:



Skidmore, Owings & Merrill

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