Answer: 1.05M. To my surprise, this simple question had no immediate answer via Google. After a bit of research, here’s a breakdown of the number of green-certified US homes by program type (cumulative)
Number of US Green-Certified Homes:
- Energy Star for Homes – 1,000,000 – (Nov. 2009 – source)
- National Green Building Standard – 25,000 (Sept. 2013 – source)
20,500 (July 2013 – source) - LEED for Homes – 24,000 (2012 – source)
- Florida Green Build – 5,600 (2013)
- Passive House – 90 (Aug. 2013 – source)
- Living Building Challenge – 39 (July 2013 – source)
- Total: 1,054,729
1,050,229
Yes, some homes may hold multiple certifications, so the total is somewhat overstated.
Notes:
- California Title 24 is a long-standing green-certification program. Number of certified houses could not be determined.
- There are more than 1M RESNET-certified homes since 1995.
Please leave a comment with any corrections or additions.
UPDATE: NGBS totals updated as per comment from hoby below.