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WASHINGTON — The U.S. Green Building Council (USGBC) released its annual list of the Top 10 States for LEED green building with Massachusetts leading the country in 2020 with the most certified square feet per capita. Across the top states, more than 60% of certifications were office, health care, higher education, and K-12 projects. This year, USGBC also released a ranking of states with the most LEED professionals with California taking the top spot. Collectively, the 2020 rankings represent 1,171 certified LEED buildings and spaces as well as more than 100,000 green building workers. 

Top 10 LEED Professionals

TTop 10 states for LEED green building in 2020.


“If we are to rebuild an economy that supports our health and our planet, we must lead with changing the way we design and build,” said Mahesh Ramanujam, president and CEO of USGBC. “Last year was a stark reminder that the quality of our buildings impacts the quality of our life. Looking ahead, people want to trust that the spaces they occupy are good for them and their communities, and LEED has always been a tool to support those goals. Now is the time to ensure that every building is LEED certified as that is the only way we are accomplishing our goals of access to healthy, green buildings, homes and spaces.” 

While offices, education, and health care projects accounted for a majority of certifications, warehouses, distribution centers, multifamily and retail projects represented almost 20%. Also, almost half of all projects were certified gold, indicating a commitment to a high level of certification. 

The Top 10 States for LEED green building is based on gross square feet of certified space per person using 2010 U.S. Census data and includes commercial and institutional projects certified in 2020. 

Top 10 LEED Professionals

Top 10 states for LEED professionals.


The global green building community is continually improving LEED to ensure it helps buildings, communities, and cities to be more sustainable, healthy, resilient, and equitable. More than two-thirds of LEED credits support human health, as the rating system addresses ventilation and filtration, daylighting, low-emitting materials, access to outdoor spaces, acoustics, and other key factors. In response to the COVID-19 pandemic, USGBC also introduced Safety First guidance to address operational challenges and assist with each state’s re-entry planning. 

Top 10 LEED Professionals

Top 10 states for LEED green building in 2020.


LEED’s foundation, however, is in its commitment to help the building sector reduce its contribution to climate change. Certification communicates progress in support of climate and ESG commitments and the goal is to get more buildings on a path to certify. Using Arc to track performance, USGBC is tracking nearly 56 million metrics ton of GHG emissions associated with energy and transportation, and more than 167 billion gallons of water. The data show that LEED projects deliver significant reductions in emissions and improvements in occupant experience, and the benefits increase with higher levels of LEED certification. The latest version of the rating system, LEED v4.1, raises the bar on green building performance, defining the latest sustainability standards while enabling project teams to continue to track progress beyond certification.

“If we want to make a positive impact in our communities, we must transform the building sector and focus on what the data is telling us,” added Ramanujam. “By putting data at the center of LEED, we’re helping teams better understand building performance, find ways to improve, and ultimately find a path to net zero.”

Top 10 LEED Professionals

Top 10 States for LEED Professionals in 2020.


Since 2018, more than 25 projects globally have certified LEED Zero, which ecognizes net-zero performance in buildings and spaces. LEED Zero expands on LEED’s work verifying achievements in net-zero carbon, energy, water, and waste. It focuses on a higher level of green building performance.

Transforming the building sector to be more sustainable requires a skilled and knowledgeable workforce. This workforce is contributing to the development and advocacy of LEED and is being quickly embraced by the next generation workforce and decision-makers. USGBC has been committed to cultivating and supporting green building professionals through its credentialing and certificate programs. This year, USGBC is also releasing an additional Top 10 list recognizing states with the most LEED green building professionals. For more information, visit