BNBT Builders Wins ENR Best Projects Award for Twitter HQ’s

One Tenth

San Francisco, CA – BNBT Builders is honored to announce that their 1 TENth project – home to Twitter headquarters in San Francisco – received Engineering News-Record’s (ENR) Best Projects Award for Best Renovation/Restoration.

The ENR Best Projects Awards celebrate and honor the building teams that created the best projects of 2015 nationwide. These extraordinary projects are selected by juries of local prominent industry professionals. Nearly 120 projects located throughout California and Hawaii were submitted to ENR this year.

The 1 TENth renovation project that Architectural Record deemed an “urban game changer” was a collaboration with BNBT Builders, RMW architecture & interiors, and building owner Shorenstein. Symbolizing San Francisco’s unique synergy of history and high tech, 1 TENth is part of the former art deco icon Market Square, which spans an entire block in the city’s Mid-Market area. The renovation transformed two furniture warehouses into over 1.2 million square feet of Class-A creative office space.

As a whole, the project creates a new kind of tech campus that has revitalized part of San Francisco and its urban environment. Built in the 1970’s, with very small windows and no front door, the 400,790 square foot building at 1 TENth was gutted, re-skinned with glass, and modernized to fit in the newest live/work/play destination in San Francisco. In addition to 10 floors now full of light, dropped ceilings were eliminated, exposing the waffle slab construction and emphasizing the long, lean span of the 80,000 square foot floor plates.

“It’s been incredibly satisfying to see the transformation of these buildings into a magnet for creative workers to help revitalize the neighborhood,” said Terry Kwik, principal at RMW architecture & interiors and the lead designer for Market Square and 1 TENth. “We had our challenges, including complex phasing and permitting, but the team worked tirelessly and collaboratively to make the project a success.”

At the ground level, a spacious new lobby features 16-foot-high panels of frameless glass, allowing views into the interior and displaying the building’s delicate waffle slab ceiling and concrete panels. Inside, the lobby houses six new destination-style elevators and backlit reclaimed brass filigree, along with Twitter’s signature blue logo. The complete renovation included a full seismic upgrade, and a state-of-the-art HVAC system to accommodate today’s high-density office occupancy.

“It is amazing to see the transformation that took place at 1 TENth, and it is a lot of fun to be part of a truly collaborative team. It took vision and guts by Shorenstein and a great design concept by RMW to make this project a success,“ said Sean Truesdale, Principal of BNBT Builders.

On December 3rd ENR will honor BNBT Builders and the entire project team at their awards banquet at the Julia Morgan Ballroom in San Francisco. This is the second consecutive year BNBT Builders has received ENR Best Projects Awards – last year for Mozilla Headquarters and GitHub Headquarters.

About BNBT Builders
BNBT Builders is a local Bay Area general contractor that specializes in technical commercial construction projects. Building San Francisco and Silicon Valley’s best workplaces, the firm is a recognized leader in preconstruction and construction best practices. BNBT delivers complex projects for world-class leaders in the life sciences, healthcare, education, corporate office, mission critical and hospitality sectors. Their projects provide the best value through innovation, smart technology, quality and sustainability.  For more information, please visit

Photo credit: Caroline Tudor.


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