Salesforce Tower

Soon to be the Tallest Building West of the Mississippi
San Francisco, California
Boston Properties & Hines
Pelli Clarke Pelli Architects
Additional collaborations with Pelli Clarke Pelli Architects:
Kendall/Heaton Associates, Inc.
Additional collaborations with Kendall/Heaton Associates, Inc.:
Contract Value: 
1,600,000 Square Feet
Year Completed: 
LEED Platinum (pre-certified)

Clark, in a construction joint venture, is constructing the Salesforce Tower at 101 1st Street. The 61-story Class-A office tower will be the tallest building in the western United States at 1,070 feet, rising above the adjacent transit center in downtown San Francisco. When complete, Salesforce Tower would surpass New York City’s Chrysler Building as the seventh tallest building in the country.

Salesforce Tower will be founded on rock by way of cast-in-place foundations extending down approximately 265 feet. The initial phase of below-grade work includes excavation, shoring, and foundations necessary to support a three-level below-grade parking structure. At the ground level, Mission Square plaza will connect to the Transit Center's rooftop park and provide a well-designed public open space for workers and the public alike.

A uniform steel and glass curtain wall system will wrap the tower’s structural steel framing, which itself will surround a concrete core. A dramatic crown of glass, metal mullions, and partially open metal screen will sit atop the tower.


The Salesforce Tower project is designed to achieve LEED Platinum certification. Sustainable features include:

  • Significantly improved indoor environmental quality with the use of full outside air economizer ventilation systems and stringent building materials analysis and specifications,
  • Floor-by-floor air intake via high efficiency air-handlers allows for significant natural ventilation,
  • Under-floor air distribution (UFAD) will greatly reduce HVAC and fan horsepower energy usage, as well as improve occupant comfort and zone controllability,
  • Adjacent to the tower is a 5.4-acre public park, which will include a walking trail, vegetation gardens, lily ponds, and outdoor amphitheater,
  • Integrated metal sunshades maximize light and views while reducing solar heat gain,
  • High performance, low-​emissivity glass will help reduce cooling load as well as enhance energy and light transmission performance,
  • Floor-to-ceiling windows afford natural daylight and spectacular views,
  • Comprehensive water recycling systems in the tower and transit center will help to reduce water consumption 30% below code inside the building, and greater than 50% in outdoor landscaping.