The per-capita list is based on 2010 U.S. Census data and includes commercial and institutional buildings certified under LEED, through which approximately 2.2 billion square feet (204,386,688 square meter) of space has been certified worldwide through 2012.
Aside from the ranking, we find three facts interesting:
1) The huge gap between state number one, District of Columbia (36.97 square feet or 3.43 square meter of LEED space certified per resident in 2012) and the rest. The number two on the list, the Sate of Virginia, reports a 3.71 square feet (0.34 square meter) of LEED space certified per resident in 2012. Diving deeper into local demographics, geographies and built-up space would make the ranking more insightful.
2) The figures are in general disappointingly low. We have tried to find some reliable figures about the percentage of space that is now LEED-certified against space that is not LEED-certified but have serious doubt about the quality of the figures we were able to find.
3) There is no mention about at which LEED-level the space is certified; only about the growth percentages in each level. Adding this layer would add great information value to the figures.
In 2012, reflecting the ongoing trend of LEED existing buildings outpacing their newly built counterparts, the LEED for Existing Buildings: Operations & Maintenance rating system accounted for 53 percent of total square footage certified in these states, compared to 32 percent certified under LEED for New Construction. The full ranking, which includes 10 states plus Washington, D.C., lists the square footage of certified projects in 2012:
1. District of Columbia: 22.2 million total square feet / 36.97 square feet per capita
2. Virginia: 29.7 million total square feet / 3.71 square feet per capita
3. Colorado: 10.5 million total square feet / 2.10 square feet per capita
4. Massachusetts: 13.3 million total square feet / 2.05 square feet per capita
5. Illinois: 24.9 million total square feet / 1.94 square feet per capita
6. Maryland: 10.9 million total square feet / 1.90 square feet per capita
7. New York: 34.3 million total square feet / 1.77 square feet per capita
8. Washington: 10.5 million total square feet / 1.56 square feet per capita
9. California: 54.2 million total square feet / 1.46 square feet per capita
10. Texas: 36 million total square feet / 1.43 square feet per capita
11. Nevada: 3.7 million total square feet / 1.39 square feet per capita
“Securing a spot on this list is a remarkable achievement for everyone involved in the green building movement in these states,” USGBC president Rick Fedrizzi said in a statement. “From architects and designers to local chapter advocates, their collective efforts have brought sustainable building design and use to the forefront of the national discussion on the environment.”