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UL Verified Healthy Building Mark

Demonstrate the health and wellness of your buildings with a Verified Healthy Building Mark.

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Provide science-driven verification for tenants and occupants

More than ever, property professionals need to demonstrate a commitment to indoor environmental health to secure and retain high-value tenants. Real estate leaders are taking strides to improve indoor environments, facilitate occupant comfort, health and wellness, secure more advantageous rental premiums and reduce tenant turnover.

The UL Verified Healthy Building program offers the real estate industry an independent source of reassurance from a respected safety science leader. This program leverages 40 years of indoor environment inspections to develop a quantitative review process driven by:

  • Building metrics discerned through performance testing 
  • Comprehensive on-site visual inspections 
  • Verification of policy implementation 

In a recent survey, MIT’s Real Estate Innovation Lab found that certified and registered “healthy buildings” command rents of 4-7.7% more per square foot than buildings without this distinction. 

(Source: MIT Real Estate Innovation Lab. (2020). “The Financial Impact of Healthy Buildings.”

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UL Verified Healthy Building


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UL Solutions has verified the indoor environmental quality of more than 280,674,151 square feet and 895 buildings to date.
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Verified Healthy Building Marks


Addressing the indoor environment with a holistic, multifaceted approach

The Verified Healthy Building program features three tiers that examine different factors against accepted science-centric standards.

Verified Healthy Building for Indoor Air

This program option evaluates indoor air quality (IAQ), as well as policies and plans for the continual advancement of IAQ. UL Solutions teams inspect HVAC systems to verify that preventative maintenance is performed while focusing on ventilation, filtration and hygiene to help ensure continuous, excellent IAQ.

Verified Healthy Building for Indoor Air and Water

This program evaluates buildings for IAQ and water quality. This includes a detailed assessment to limit the risk of waterborne pathogens and testing for contaminants as outlined by the Environmental Protection Agency’s (EPA) drinking water standards to help ensure water is safe for consumption.

UL Solutions teams work with building stakeholders to develop a water management plan to help control Legionella and other bacteria in cooling towers and potable water systems.

Verified Healthy Building for Indoor Environment

This is the most holistic look at a building’s indoor environment, assessing IAQ and water quality as well as building cleanliness, lighting and acoustics. This selection also helps ensure that policies and plans have been developed and enacted to support the continual advancement of overall indoor environmental quality (IEQ).

The Verified Healthy Building Mark is aligned with science-centric standards from such third-party organizations as:

  • American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
  • Centers for Disease Control (CDC)
  • Environmental Protection Agency (EPA)
  • Leadership in Energy and Environmental Design (LEEDv4.1)
  • National Institute for Occupational Safety and Health (NIOSH)
  • World Health Organization (WHO)

Helping ensure healthier indoor environments

Key performance assessment areas

The UL Solutions approach to assessing your built environment

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Indoor air

Our program measures relevant air quality factors throughout the building. Specific measurements include the following factors that impact the health and safety of occupants:

  • Temperature and humidity
  • Carbon dioxide
  • Volatile Organic Compounds (VOCs) and formaldehyde from building pollutants, such as cleaning products and off gassing from building materials, furnishings and personal effects
  • Particulate levels
  • Combustion gasses, carbon monoxide, nitrogen dioxide and sulfur dioxide related to cooking, vehicle exhaust and pollution
  • Ozone, a pollutant related to smog

Additionally, a thorough qualitative inspection of the HVAC system focusing on ventilation, filtration and hygiene provides a predictive analysis helpful in maintaining good indoor air quality over time.

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Water quality

This assessment focuses on overall optimal water quality:

  • Develop a site-specific water management plan that includes guidance on Legionella risk reduction and procedures for maintaining a building’s water systems during times of low occupancy.
  • Measure representative assets in the building’s potable water system to evaluate if the water meets the EPA’s primary standards for drinking water, including heavy metals and bacteria.
  • Sample for Legionella in such high-risk assets as cooling towers and decorative fountains.
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The cleanliness of a building is one of the most important visual aspects to tenants and occupants. Our team assesses the performance of your janitorial program to support occupant health and well-being, such as the cleaning of high-touch surfaces and overall building cleanliness.

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This assessment measures background noise of the building’s fundamental mechanical systems to find excessive noise levels that may deter occupants’ ability to concentrate in working environments.

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This area focuses on lighting for safety and comfort:

  • Analyze adequate lighting in common areas to facilitate safe egress. 
  • Identify fixtures with issues, such as flickering, that may affect visibility and impact comfort for occupants.
Critical evaluation criteria for indoor environments

Benefits tailored to your built environment

Commercial and Corporate Real Estate

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With the UL Verified Healthy Building program, owners and managers can show dedication to a work environment that prioritizes health, well-being and productivity. Feel confident that your building’s healthy environment can improve employee and occupant performance while increasing your building’s value and returns for stakeholders.


Employees and guests deserve a clear commitment to a healthy indoor environment. Our programs evaluate quality and cleanliness across various hospitality settings to provide your team with an optimal setting for rest and relaxation backed by third-party verification from UL Solutions.


Specialized production environments feature industry-specific challenges regarding indoor environment management of factory floors or offices. Pollution control strategies are required to manage the needs of equipment, ingredients, components or chemicals.

Our program may help reduce risks in the manufacturing area and improve the environmental quality of adjacent office spaces, which can also lead to improved productivity.


Add to your existing green building achievements

The Verified Healthy Building program is designed to work in tandem with the requirements of other green building programs to support a building’s overall sustainability, health and wellness while not adding to an already intense regulatory workload. Download our brochure to learn more about how our programs overlap with certain markers for other third-party programs.


There are currently over 600 green building rating systems in use globally. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) released their annual certification and rating systems comparison, and ASHRAE recognized the UL Verified Healthy Building Mark as one of 17 rating systems with the most relevance to ASHRAE’s review criteria.

Read more by ASHRAE.


Download our brochures

UL Solutions - Verified Healthy Building Mark Brochure 2022

19.31 MB
Methodology for Marketing Claim Verification

Methodology for Marketing Claim Verification - UL Verified Healthy Building - Commercial

467.65 KB

Methodology for Marketing Claim Verification: UL Verified Healthy Building – Manufacturing Facilities

460.93 KB

Methodology for Marketing Claim Verification: UL Verified Healthy Building – Hospitality

451.46 KB

Methodology for Marketing Claim Verification - UL Verified Healthy Building - Fire Stations

440.51 KB

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