Verified Healthy Building


Lerner Corporation

Verify ID:


Expiration date:

October 24, 2023 - October 23, 2024

Verification Mark

Facility Information

Washington Square is an iconic trophy office building located near the intersection of Connecticut Avenue and K Street, NW, in the heart of Washington, D.C.'s Central Business District and within walking distance of the White House. This newly-renovated architectural landmark, which received the prestigious LEED Gold Certification, encompasses one million square feet of premier office and retail space. With direct access to the Farragut North Metro Station and surrounded by many of Washington’s finest hotels, shops and restaurants, Washington Square enjoys an unparalleled location that is home to some of the nation's most distinguished firms. The building features nearly 100,000 square feet of highly-visible retail space, with an appealing mix of dining, shopping and services that includes Morton’s The Steakhouse, Starbucks, Men’s Wearhouse and US Post Office.
  • First Class 1 Million SF | 12-story office tower
  • Direct access to Farragut North Metro Station located within the building
  • LEED Gold certification
  • Fitwel 1 Star rating
  • Concierge service
  • Parking garage with 3 levels of below ground parking
  • 24-hour building security
  • Developed, owned and managed by Lerner and The Tower Companies 

Applicable To:

Washington Square, 1050 Connecticut Avenue NW, Washington, DC 20036

Marketing Claim Verified by UL Solutions

Verified Healthy Building for Indoor Air and Water

Verification Method

UL’s Healthy Buildings Verification Mark for Indoor Air and Water 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 and water 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. When necessary, 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.

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.