North Bethesda Center

Bethesda, MD
Garden Roof® AssemblyGarden Roof® Assembly: ExtensiveRoofing
Project Type: 
New Construction
62,500 sq ft.
Completion Date: 

Washington, D.C. is one of the greatest testaments to architecture in the country, with historical roots dating back centuries and buildings continuing to stand the test of time. Just outside the district is Bethesda, MD, home to a 32-acre and $850 million North Bethesda Center – a mixed-use pedestrian-friendly development delivering more than 930,000 s.f. of office space, 202,000 s.f. of retail space and 1,275 multifamily housing units upon completion.

Although original plans called for a standard inverted roof membrane assembly (IRMA) with gravel ballast, the North Bethesda Center project demonstrates that shifts in architectural plans and structural modifications mid-construction can be successful, in addition to achieving green building with a modest budget. With strategic collaboration among developer, contractor and landscape architect teams, the finished product provides a showpiece of sustainable design integrated with innovative and effective landscape design.

Atop a ground level retail establishment, a courtyard type layout features a combination of sedum, grasses and a wide array of plant species of various sizes and colors, all in a compelling landscape design that serves as a visual amenity for residents of the adjacent tower housing unit.

The various roof levels are comprised of 55,000 s.f. of American Hydrotech assemblies; including 32,000 s.f. of stone ballasted Protected Membrane Roof complimented by 17,500 s.f. of Garden Roof® and 6,000 s.f. of the Ultimate Assembly®. Most importantly, the owner has peace of mind knowing that Monolithic Membrane 6125® and its 50 year track record is the seamless waterproofing for all of the assemblies. Phase two of the North Bethesda Center began in early 2009 and the entire project is expected to be completed between 2013 and 2015.

Washington Building Congress - 2008 Craftsmanship Award
LCOR Incorporated
Dorsky Hodgson Parrish Yue
Landscape Architect: 
Parker Rodriguez, Inc.
General Contractor: 
Bovis Lend Lease, Inc.

Recent Press

  • April 3, 2017
    Wind data is a critical issue to consider when building a new structure. An increase in the number of green roofs on buildings has driven a need for new wind design standards to be written for vegetative roofing assemblies. Richard Hayden discusses...
  • September 27, 2016
    (September 28, 2016) Washington State has always been considered a pioneer when it comes to the adoption of greener and more sustainable practices. One of the most sustainable practices is to reuse an already constructed building and enhance that...
  • July 16, 2016
    (July 16, 2016) Excerpt from an article in Forester Daily News Green roofs – also known as vegetated or garden roofs – are key green infrastructure elements and are being increasingly recognized for their “valuable ability to absorb, reduce, and...
  • July 1, 2016
    CHICAGO, ILLINOIS (July 1, 2016) City Creek Center in downtown Salt Lake City, Utah, is one of the largest mixed-use urban developments built in the last 10 years. It's also one of the most innovative. Completed in 2012, the 23-acre project includes...

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