The tallest building allowed in San Francisco by zoning, Salesforce Tower is a signature on the city’s skyline with a number of healthy building strategies woven into its design.

At a Glance

Boston Properties
San Francisco, CA
1,591,000 SF
Pelli Clarke & Partners (Architect)Kendall/Heaton Associates (Architect)Hathaway Dinwiddie (General Contractor)Clark Construction Group (General Contractor)
LEED Core & Shell, v2009 (Platinum)
  • LEED CS Consulting
  • Energy Modeling
  • Life Cycle Cost Analysis (LCCA)
  • Whole-Building Commissioning

The Challenge

Provide innovative healthy and sustainable building solutions to guide the project beyond its LEED Gold pursuit to achieve an aspirational LEED Platinum certification for a leading high-performance workplace.

  • Conduct numerous evaluations for water recycling and a cogeneration system
  • Maximize indoor environmental quality to create a healthy and sustainable environment
  • Reduce HVAC and energy usage to improve occupant comfort and zone controllability
“We have engaged Stok on several projects over multiple years. Their team is engaging, energetic, and informed to the many elements of the tasks at hand. It has been, and continues to be, a true pleasure to work with this group of people to advance our sustainability positions over multiple properties and adjust operating styles and philosophies from the lessons learned.”

By the Numbers

Energy reduction
Gallons of water saved
Tons of waste diverted
MTCO2e emissions prevented

The Solution


The tower features a first-of-its-kind HVAC system with floor-by-floor air handlers that maximize natural ventilation, creating a healthy and sustainable solution by lowering CO2 levels without requiring conditioned air. Utilizing under-floor air distribution (UFAD) greatly reduced HVAC and fan horsepower energy usage while improving occupant comfort and zone controllability. The introduction of UFAD also allowed for increased floor to ceiling space, creating breathtaking 360 degree views of San Francisco through low-emissivity glass that enhances energy performance and natural light transmission.


Stok’s water consulting helped reduce water consumption by 30% below code inside the building and more than 50% in outdoor landscaping. Outdoor landscaping includes a 5.4 acre public park adjacent to the tower, which features a walking trail, vegetation gardens, lily ponds, and an outdoor amphitheater to create an inviting communal space.


By uncovering numerous energy efficiency measures, Stok took Salesforce Tower from targeting LEED Gold to comfortably achieving LEED Platinum. The building serves as an example of the successful alignment of sustainable and healthy building practices, and will remain an iconic component of the San Francisco skyline and Salesforce’s global portfolio for years to come.


Project Leadership

Jacob Arlein
Strategic Growth | Sustainable Buildings
Bryan Hee
Commissioning | Energy Audits | Measurement & Verification