350 Bush /
Mining Exchange Building

350 Bush Street, San Francisco, CA

350 Bush Street is a 19-story 360,000 sf office tower which incorporates the historic landmark San Francisco Mining Exchange Building as its principal entry. Rising in the heart of San Francisco’s Financial District, the building stands as a thoughtful reinvention of the historic Mining Exchange Building, where early twentieth century commercial architecture meets contemporary workplace design. Originally constructed as the Mining Exchange in 1923, the structure embodied the optimism and industrial ambition of California’s resource economy. Its dignified stone facade, classical proportions, and finely articulated window rhythms expressed permanence and civic confidence at a moment when mining capital shaped the city’s global influence.

The renovation carefully restored these historic architectural elements while introducing a refined contemporary infrastructure within. Original materials have been preserved and repaired, historic detailing clarified, and interior spaces reimagined to support modern standards of light, flexibility, and technological performance. At street level, a renewed entry lobby into the office building reveals restored structural character alongside warm natural materials and contemporary finishes, creating an arrival experience that bridges heritage and innovation. Above, new efficient office floors balance historic structure with adaptable planning, allowing organizations to inhabit a building that carries both memory and momentum.

The result is a rare architectural dialogue between preservation and progress, where the legacy of San Francisco’s Mining Exchange continues within a renewed workplace environment designed for the evolving energy of the city’s financial district. The next generation of enterprise occupy the new office building above while honoring the craftsmanship and ambition that first defined this landmark address on Bush Street more than a century ago.

Awards
PCBC: Gold Nugget Award - Grand Prizes | 2020

BICB Building Industry Conference Board | 2016

Sustainability
LEED Gold

Street view of the San Francisco Curbe Exchange building illuminated at dusk, featuring a neoclassical facade with columns and decorative carvings, surrounded by modern glass high-rise buildings, with cars parked along the street and a blurred pedest
Cityscape of downtown buildings at sunset with light trails from moving vehicles.
The San Francisco Curb Exchange building, a neoclassical structure with large columns and ornate carved sculptures, located on a busy urban street with cars, a pedestrian, and tall modern skyscrapers in the background.
Close-up of a modern skyscraper with glass windows and metal framework reflecting sunlight.
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City park with trees, benches, and a modern glass office building in the background during daytime.
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Tall modern glass skyscrapers in a city street scene with cars and pedestrians, blue sky with some clouds.
Modern glass skyscraper reflecting the sky and surrounding buildings, with an older neoclassical building in the foreground on a city street.
Low-angle view of tall modern glass and stone skyscrapers in an urban cityscape.
Cityscape featuring modern glass office building with outdoor terrace and older stone buildings, with traffic on the street below at dusk.
Outdoor seating area with tables, chairs, and planters in front of a modern high-rise building with glass and stone facade.
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A spacious, elegant lobby with high ceiling featuring decorative skylights, white walls, and dark wood flooring. There are several sofas and chairs arranged around small tables, with potted plants on either side. Artworks are displayed on the walls,
Interior ceiling with decorative grid windows on the left and modern geometric LED lighting on the right.
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