Non-Destructive Investigation Services

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Notable Projects and Clients

  • Frank Lloyd Wright's Solomon. R. Guggenheim Museum, New York and Fallingwater, PA
  • New York State Capitol Building, Albany, NY
  • United States Capitol, Washington, D.C.
  • New Jersey State Capital Building, Trenton, NJ
  • Wyoming State Capital Building, Cheyenne, WY
  • Hearst Castle, San Simeon, CA
  • NYC School Building Authority
  • Rose Bowl, Pasadena, CA
  • Santa Monica Airport, CA
  • Yale University, New Haven, CT
  • Princeton University, Princeton, NJ
  • Columbia University, New York, NY
  • McGill University, Quebec, Canada
  • East & West Block, and Washington Street Parliament Buildings, Ottawa, Canada
  • Metropolitan Transit Authority Subway Tunnels, New York, NY
  • NYC Parks Department
  • St. Patrick's Cathedral, New York, NY
  • Andrew R. Mellon Auditorium, Washington, D.C.
  • Philadelphia Police Headquarters, Philadelphia, PA
  • USPS Morgan Processing and Distribution Center, New York, NY
  • Soldiers' and Sailors' Monument, New York, NY
  • Colony Club, New York, NY
  • The Plaza Hotel, New York, NY

Featured Work

GBG investigates a wide range of structures from historically significant buildings to small private residences.