WELL Building Standard

WELL Building Standard. The WELL Building Standard is a performance-based system for measuring, certifying, and monitoring features of the built environment that impact human health and well-being. Administered by the International WELL Building Institute (IWBI), it is grounded in scientific and medical research on the connections between buildings and occupant health. The standard provides a framework for designing and operating buildings with a focus on air quality, water quality, nutrition, light, fitness, comfort, and mind.

Overview

The framework is structured around ten core concepts that target specific aspects of occupant health, moving beyond traditional green building metrics focused on environmental impact. Certification is achieved through a combination of preconditions, which are mandatory, and optimizations, which are elective points. Projects are assessed by Green Business Certification Inc. (GBCI), the same body that certifies LEED projects, through documentation review and on-site performance testing. The standard is applicable across various real estate sectors, including commercial office, multifamily residential, retail, restaurant, and educational facility projects globally.

History and development

The standard was launched in October 2014 by Delos Living LLC, a company founded by Paul Scialla with a mission to improve human health through design. Its development involved collaboration with leading physicians, scientists, and industry professionals, including researchers from the Mayo Clinic and the Cleveland Clinic. The International WELL Building Institute was subsequently established to oversee the standard's administration and evolution. Major versions include WELL v1, launched in 2014, and the more flexible and outcomes-focused WELL v2, which was piloted in 2018 and fully released in 2020 to encourage broader adoption.

Certification process

The process begins with project registration through the International WELL Building Institute. Teams then work to demonstrate compliance with preconditions and selected optimizations across the ten concepts, submitting documentation for review. A critical final step involves on-site performance verification conducted by an independent assessor from Green Business Certification Inc., who tests parameters like air quality and water quality. Successful projects achieve one of four certification levels: WELL Bronze, WELL Silver, WELL Gold, or WELL Platinum. Certification must be renewed every three years, requiring ongoing performance data submission to ensure continued compliance.

Features and concepts

The ten concepts form the standard's foundation: Air focuses on ventilation and pollutant source control; Water addresses filtration and testing; Nourishment promotes healthy food choices and labeling; Light emphasizes circadian lighting design and glare control; Movement encourages physical activity through staircase design and active design; Thermal Comfort ensures individual thermal control; Sound manages acoustics and noise intrusion; Materials restricts hazardous substances; Mind supports mental health through biophilic design and stress reduction; and Community aims to foster social cohesion and health equity.

Impact and reception

Adoption has grown rapidly among major corporations and institutions, with early high-profile projects including the CBRE Group headquarters in Los Angeles and the JLL office in Chicago. Proponents, including many in the corporate real estate sector, cite benefits such as improved employee productivity, reduced absenteeism, and enhanced talent recruitment. The standard has also influenced public policy, with elements incorporated into guidelines from organizations like the American Institute of Architects and the World Green Building Council. Criticisms have included the cost of certification and verification, with some arguing it may favor large, well-funded projects over smaller developments.

Comparison with other standards

While LEED primarily addresses a building's environmental footprint and resource efficiency, this standard is exclusively focused on human health outcomes, though the two are often pursued together as complementary systems. Compared to Fitwel, which is also health-centered, this standard is generally more comprehensive and includes mandatory performance testing. It differs from BREEAM, a European standard with a broader sustainability scope, by its dedicated health focus and structured post-occupancy verification requirements. The Living Building Challenge is more rigorous and holistic but has far fewer certified projects, whereas this standard offers a more modular and scalable pathway for mainstream market transformation.