12 min read · Grobrix team with KaiCari Impact Group
In corporate real estate, sustainability and occupant well-being are fast becoming critical priorities. Certifications such as LEED, BCA Green Mark and WELL provide frameworks to reach these goals, each with a distinct focus.
Below is a summary of their origins, criteria and impact on corporate real estate. After that, in collaboration with the KaiCari Impact Group, we look at how simply bringing urban farming into the office can be an efficient, cost-effective way to help achieve them.
LEED
LEED (Leadership in Energy and Environmental Design) was developed by the U.S. Green Building Council (USGBC) in 1993. It is the world’s most widely recognised green building rating system, applied in over 186 countries with more than 195,000 certified buildings as of 2024. It covers energy efficiency, water conservation, waste reduction and indoor environmental quality, and applies to commercial offices, data centres and retail spaces, which makes it highly relevant for corporate real estate.
LEED levels · 100-point scale + 10 bonus
Projects earn points across sustainable sites, energy efficiency, materials selection and indoor environmental quality. For corporate real estate, the Building Design and Construction (BD+C) system supports new builds and major renovations, while Operations and Maintenance (O+M) focuses on improving existing buildings.
LEED certification enhances property value, reduces operating costs and aligns with ESG goals. A 2021 USGBC report noted that LEED-certified offices attract higher leasing rates and perform well for ESG-focused investors.
BCA Green Mark
Launched in 2005 by Singapore’s Building and Construction Authority (BCA), Green Mark is tailored to Singapore’s tropical climate and urban context, and has influenced practice in Malaysia and China. It evaluates energy efficiency, water efficiency, environmental protection, indoor environmental quality and other green innovations.
Green Mark levels
Its focus on energy is especially impactful. Retrofitted buildings that meet Super Low Energy (SLE) standards are 63% more energy-efficient, and new SLE buildings can pay back in as little as 4.5 years. Certification involves an application, pre-assessment audits and documentary reviews. Green Mark boosts marketability and supports Singapore’s net-zero goal for 2050, though its regional focus limits global use compared with LEED.
WELL
The WELL Building Standard, from the International WELL Building Institute (IWBI), focuses only on human health and well-being: air, water, nourishment, light, fitness, comfort and mind. Where LEED and Green Mark prioritise the environment, WELL targets occupants, which makes it a natural complement for workplaces aiming to lift productivity and satisfaction.
It is structured around ten concepts with performance-based requirements. WELL-certified offices improve air quality, optimise lighting and promote mental well-being, which can reduce absenteeism and boost morale. Because it is less comprehensive on environmental sustainability, it is often paired with LEED.
Impact in corporate real estate
Together, these certifications drive competitive advantage. LEED enhances global marketability and can cut energy use by 20–30%. Green Mark is critical in Singapore, boosting occupancy and delivering returns through energy savings. WELL prioritises employee health, increasingly vital as companies compete for talent.
The challenges are cost, complexity and regional fit. Teams need to match certifications to project goals, local regulations and market demand. As sustainability targets tighten, all three will stay central to high-performing, occupant-centric buildings.
