Green Buildings Improve Productivity, Intelligence and Sleep: Study

Team L&M

There is another compelling reason why architects and builders should prioritise green building construction. Apart from being environmentally friendly, green buildings may also improve human intelligence and wellbeing. Surprised? Scientific research now supports this claim.

A study conducted by the Harvard T.H. Chan School of Public Health in the United States found that people who work in green buildings tend to think better at work and sleep better at home.

How Green Buildings Improve Performance

Green buildings are designed with better ventilation, natural lighting and temperature control systems. These features significantly improve indoor air quality and create a healthier workplace environment.

According to the study, improved building conditions help employees:

• Think more clearly

• Make better decisions

• Increase productivity at work

• Experience better overall wellbeing

A well-designed green building can also make employees feel happier, which further boosts their work performance.

What Is a Green Building?

A green building is a structure designed to reduce negative environmental impacts through sustainable design, construction and operation. These buildings aim to conserve natural resources while improving the health and comfort of occupants.

Green buildings often include features such as:

• Energy-efficient systems

• Sustainable materials

• Improved indoor air quality

• Better lighting and ventilation

Such features not only protect the environment but also enhance the quality of life for people working or living in these spaces.

Findings from the Harvard Study

The research analysed employees working in certified green buildings across five US cities. Their performance and health indicators were compared with workers from the same companies who worked in conventional office buildings.

The results were striking.

Workers in green buildings scored more than 25% higher in a standard cognitive test. The test used a simulation-based computer program similar to a Sims-style decision-making game to measure complex thinking and planning abilities.

These simulations reflected the kind of decision-making people face in real workplace situations.

Better Sleep Quality

Researchers also studied workers’ sleep patterns using sensor-equipped watches that tracked sleep duration, movement and interruptions during the night.

The results showed that employees working in green offices had 6% higher sleep scores, indicating better sleep quality compared to those working in conventional office spaces.

Reduced Sick Building Symptoms

Another important benefit observed in green buildings was a reduction in “Sick Building Syndrome” symptoms, which include:

• Headaches

• Eye irritation

• Respiratory discomfort

Workers in green offices reported 30% fewer symptoms compared to those in traditional office environments.

This improvement occurs because green buildings maintain lower levels of carbon dioxide and volatile organic compounds (VOCs)—chemicals commonly released from furniture, carpets and building materials.

Why Green Buildings Matter

The findings highlight that sustainable building design benefits both the environment and human health. By improving air quality, lighting and comfort levels, green buildings help workers stay healthier, think more clearly and perform better at work.

For architects, builders and businesses, investing in green buildings is not just about sustainability—it is also about creating smarter, healthier and more productive workplaces.