Children’s Hospital of Philadelphia

Philadelphia, The United States

Property owner

Children’s Hospital of Philadelphia (CHOP)

Main contractor

C. Erickson



Acoustic consultant

Metropolitan Acoustics

Structural engineer


CDM-DPM with overheight

Building type




Intervention level



Built in 1911 to house Wanamaker’s, one of America’s first department stores, the Wanamaker Building now features modernized office floors above the historic retail space that holds Macy’s and the famous Wanamaker Grand Court Organ. The Wanamaker Grand Court Organ is the largest fully functioning pipe organ in the world and consists of 28,750 pipes.

Its sunlit Grand Atrium, fitness center, lobby coffee shop, onsite parking, and proximity to public transportation, make the Wanamaker Building a highly desirable office location in the Center City neighborhood of Philadelphia.

With a 54,000-square-foot office lease, Children’s Hospital of Philadelphia (CHOP) has expanded its presence in the iconic Wanamaker Building. CHOP now occupies a total of 300,000 square feet across five floors, making them the largest tenant.

An engineered CDM-DPM floating floor system with discrete isolators, pre-cut batt insulation and perimeter isolation board was installed to acoustically isolate CHOP’s new conference rooms from the atrium and the massive pipe organ.

Children’s Hospital of Philadelphia (CHOP)
Children’s Hospital of Philadelphia (CHOP)

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