Verified Healthy Building


One Liberty Place - Metropolis

Verify ID:


Expiration date:

February 05, 2021 - February 04, 2022

Verification Mark

Facility Information

One Liberty Place, one of the city’s most prestigious and award-winning commercial addresses, is a 61-story trophy office tower located in the heart of Center City Philadelphia. Designed by internationally acclaimed architect Helmut Jahn of the Murphy/Jahn Architectural firm, One Liberty Place represents the synthesis of modernist technology and classic skyscraper design. With its steel frame and curtain wall design composed of Blue Pearl Granite, silver and sapphire blue dual pane windows, and its White Carrara marble lobby, One Liberty Place is a remarkable Philadelphia icon rising 945 feet above the streets of the city. 
Demonstrating the superior sustainability, health and wellness practices that are in place at this property, in addition to its UL Certification, One Liberty Place is LEED Gold, Fitwel Certified and Energy Star rated. The striking image of One Liberty Place’s beautiful design forever changed the skyline in Philadelphia. In fact, the silhouette of One Liberty Place has become a symbol that represents the City of Philadelphia itself.

Applicable To:

1650 Market Street, Philadelphia, PA 19103-7200

Marketing Claim Verified by UL Solutions

Verified Healthy Building for Indoor Air

Verification Method

UL’s Healthy Buildings Verification Mark for Indoor Air demonstrates that indoor spaces provide healthy indoor air quality (IAQ). It shows a commitment by building owners and managers to create and maintain indoor environments that support tenant health, well-being and comfort, backed by UL’s globally recognized expertise in IAQ and building health. These buildings meet rigorous performance criteria and have policies and plans in place for continual advancement of IAQ. To achieve the UL Healthy Buildings Verification Mark, spaces underwent a desktop audit and on-site visits that include visual inspections and performance testing to evaluate a range of building conditions. The program includes an annual comprehensive assessment coupled with surveillance at the mid-year point. The IAQ testing requirements verify that the building air meets rigorous standards. These standards are aligned with industry-recognized, third-party organizations such as the Environmental Protection Agency (EPA), the National Institute for Occupational Safety and Health (NIOSH), the World Health Organization (WHO) and the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), among others. All laboratory testing and analysis methodologies are informed by the EPA Compendium of Methods, ASTM D5197 and TO-17 for air sampling, and EPA methods.

About the Company

Metropolis, a privately held real estate company based in Chicago, owns a collection of distinctive, Class A office towers with over six million rentable square feet. Our properties are located in the central business districts of Chicago, Houston, Dallas, Philadelphia as well as San Francisco and offer exceptional value to our tenants. Additional investment holdings include: hotel interests, a downtown retail mall, multiple parking facilities and urban developable land. Our strategic land sites in Chicago, Houston, and Dallas offer opportunities for significant growth and development. For over 20 years Metropolis has maintained a well-established reputation for excellence in owning and managing iconic office assets. Our mission is to enable our customers to create a positive sense of belonging to their workspace. We believe our meticulous attention to detail, dedicated relationships and long-term ownership philosophy are what sets us apart. For more information please go to 

What is UL Verification?

UL Verification is an objective, science-based assessment that confirms the accuracy of marketing claims. Our independent assessment process scrutinizes the validity of specific advertising or promotional statements, giving you a way to separate verified fact from fiction.