In 2017, Hong Kong's 30,643-square-meter King Wah Road building used special paint to improve air quality; 9 years later, its WELL certification supports healthier indoor spaces

In the heart of Hong Kong's dense urban environment, 18 King Wah Road offers an early example of how commercial buildings can be designed around human health rather than focusing exclusively on energy efficiency or architectural appearance. Completed in 2017, the 30,643-square-meter commercial development in North Point incorporated a collection of technologies intended to improve indoor environmental quality, including a distinctive low-VOC photocatalytic paint in its car park. The building was also verified under the WELL Building Standard in 2017, placing occupant health and wellbeing at the center of its sustainability strategy. Nine years later, the project remains a useful case study in how healthier building design can combine materials, ventilation, daylight, humidity control and air filtration into one integrated approach.

One of the most intriguing features at 18 King Wah Road is the special paint used on interior surfaces in the car park. The World Green Building Council case study describes the coating as a low-volatile-organic-compound, photocatalytic titanium dioxide, or TiO2, paint. Its purpose goes beyond conventional decoration: through a photocatalytic process, the coated surface can help break down certain irritant volatile compounds when activated by light. In a busy city where traffic-related pollutants and other airborne contaminants are important environmental concerns, reducing potential sources of indoor pollution can contribute to a healthier built environment. The project therefore demonstrates an increasingly important principle in green architecture—materials themselves can become part of a building's environmental and health strategy.

However, the King Wah Road project was never dependent on one innovative paint product alone. Its designers combined several systems to address indoor air quality and occupant comfort. The building uses particulate filtration, photocatalytic oxidation purifiers and bio-oxygen generators as part of its air-treatment strategy, while computational fluid dynamics analysis was used to examine local wind conditions and the building's potential for natural ventilation. This combination is significant because indoor air quality is influenced by numerous factors, including particulate matter, volatile organic compounds, carbon dioxide, humidity, ventilation and biological contaminants. Modern healthy-building design therefore increasingly treats air quality as a systems issue rather than something that can be solved by installing a single piece of equipment.


The building's approach to humidity and temperature is another important part of its health-focused design. King Wah Road incorporated a solar desiccant system for air conditioning, intended to improve control of indoor humidity and thermal conditions while reducing energy requirements compared with conventional approaches. Managing humidity matters because excessive moisture can contribute to mould growth, while uncomfortable temperature conditions can affect concentration and wellbeing. The project also used active chilled beams in lobby areas, helping provide cooling while reducing the risk of uncomfortable drafts. Together, these features show how energy efficiency and occupant comfort do not necessarily have to compete. A well-designed building can seek to reduce energy consumption while simultaneously creating a more comfortable indoor environment.

Natural light was another major component of the design. Light shelves were incorporated into the facade to help carry daylight deeper into the floor plate, potentially reducing reliance on artificial lighting and improving the quality of occupied spaces. Exterior shading was designed using daylight and solar analysis to balance natural illumination against glare and solar exposure. This matters in a high-density city such as Hong Kong, where building orientation, surrounding structures and intense sunlight can make daylight management particularly challenging. Instead of treating windows and facade elements simply as architectural features, the King Wah Road design used them as tools for creating better indoor conditions. The result is a broader definition of sustainable construction in which daylight, thermal comfort and air quality are considered together.

The project's WELL certification is especially significant because the WELL Building Standard focuses specifically on the relationship between buildings and human health. Unlike sustainability ratings that concentrate heavily on energy, water or environmental performance, WELL addresses areas intended to influence occupants' health and wellbeing. Contemporary WorldGBC guidance similarly emphasizes clean indoor air, low-emission materials, effective ventilation and filtration as important strategies for healthier buildings. King Wah Road was among the early Hong Kong projects to receive WELL Gold pre-certification, and WorldGBC's case study records its WELL verification in 2017. The project also received other green-building recognition, including LEED Platinum pre-certification and BEAM Plus Platinum, demonstrating that environmental performance and occupant wellbeing can be pursued together.

The continuing relevance of 18 King Wah Road lies in the fact that healthy buildings have become increasingly important since the project was completed. People spend substantial amounts of their lives indoors, making ventilation, filtration, material selection, lighting and thermal comfort important components of the places where they work and spend time. WorldGBC's current healthy-building guidance specifically recommends low-VOC paints and finishes, appropriate ventilation and filtration, and strategies to reduce dampness and mould. These principles mirror many of the design decisions made at King Wah Road nearly a decade ago. While the available WorldGBC case-study page does not establish that the project's 2017 WELL certification was renewed in 2026, its documented design provides a valuable early example of the direction in which healthy commercial buildings have evolved.

18 King Wah Road demonstrates that the future of green buildings is not only about consuming less energy—it is also about creating spaces that are healthier and more comfortable for the people inside them. Its 30,643-square-meter footprint brings together low-VOC photocatalytic coatings, sophisticated air treatment, natural ventilation analysis, solar desiccant technology, chilled beams, daylight strategies and external shading. The project's 2017 WELL verification gave formal recognition to that health-centered approach, while its inclusion in the WorldGBC case-study library has preserved it as an example of sustainable building practice. Nine years after its completion, King Wah Road remains a compelling reminder that the most meaningful green buildings are those where environmental responsibility and human wellbeing are designed to work together.