National Grid, a utility provider for 3.3 million customers in Massachusetts, New Hampshire, New York, and Rhode Island, as well as the largest distributor of natural gas in the northeastern U.S., has gone double Platinum with its corporate office in Waltham, Mass.—LEED Platinum, that is. The office, designed by Boston-based Sasaki Associates, recently received LEED Platinum certification for both Core and Shell (LEED CS) and Commercial Interiors (LEED CI) from the U.S. Green Building Council. It is the second single-tenant facility in the world to do so.

The building was built in partnership between Sasaki, National Grid, developer Davis Marcus Partners, construction manager John Moriarty & Associates, mechanical engineers and LEED CS consultants AHA Consulting Engineers, base building architects ADD Inc., tenant project manager Jones Lang LaSalle, and the property owner, Reservoir Woods East (which is a partnership between affiliates of Davis Marcus Partners and Prudential Real Estate Investors).

Sustainable elements in the new 312,000-square-foot, three-story building include: 

  • A lighting strategy that results in a power density of 0.65 watts per square foot, the equivalent of 41 percent below code. Techniques employed include use of task lighting as well as energy-efficient fluorescent bulbs and LED fixtures, and daylight-sensing dimming controls;  

  • A graywater system that reduces potable water usage by 66 percent compared with an average building;

  • 20,000 square feet of photovoltaic panels that provide 50 percent of energy for lighting and exterior sunshades that reduce the HVAC load by 10 percent

  • High-efficiency heating and cooling systems and insulated concrete panels that reduce energy consumption;

  • Building materials that were carefully selected for their sustainable attributes and contain minimal or no VOCs and no added urea formaldehyde;

  • A modular workstation configuration that allows each workstation a window view to the outdoors and also allows workstations to be quickly reconfigured as needed;

  • Water-conserving furnishings and fixtures including dual-flush toilets, automatic sensor faucets, and a rainwater system, all of which combined are expected to reduce consumption by about 2.4 million gallons per year;

  • Recycling of more than 93 percent of construction waste; and

  • Educational graphic elements throughout the building that scored innovation points, including a touchscreen dashboard in the lobby that tracks building performance.

  • Sustainability diagrams in National Grid's corporate office
    Robert Benson Photography Sustainability diagrams in National Grid's corporate office