Top 10 States for NGBS Certification Activity
With nearly 350,000 homes certified to the National Green Building Standard (NGBS) since its launch in 2009, builders across the United States are continually adding to the pipeline of NGBS projects.
Here’s a snapshot at the top NGBS Green certification activity in 2021 for both single-family and multifamily projects:

Five states rank in the top 10 for both single-family and multifamily projects: Texas, Florida, North Carolina, Maryland, and Virginia.
The NGBS provides builders with a national standard to define and measure sustainable multifamily and single-family homes, developments and remodeling projects. It also offers consumers a level of confidence that they are purchasing an independently verified green property.
Builders can learn more about the value of NGBS Green certification at nahb.org.
To stay current on the high-performance residential building sector, with tips on water efficiency, energy efficiency, indoor air quality, and other building science strategies, follow NAHB’s Sustainability and Green Building efforts on Twitter.
Latest from NAHBNow
Sep 11, 2025
2026 Best of IBS Awards OpenThe NAHB International Builders’ Show® (IBS) recognizes the outstanding building products and services with the Best of IBS Awards. Apply by Nov. 21, 2025, to showcase your products.
Sep 11, 2025
Who are NAHB’s Remodeler Members?Remodelers constitute nearly one quarter of NAHB’s membership. Twenty-one percent of builder members list residential remodeling as their primary business activity in the 2024 Member Census.
Latest Economic News
Sep 12, 2025
Household Real Estate Asset Values Reach New HighThe market value of household real estate assets rose to $49.3 trillion in the second quarter of 2025, according to the most recent release of U.S. Federal Reserve Z.1 Financial Accounts. The value rose by 2.7% from the first quarter and is 1.1% higher than a year ago. This measure of market value estimates the value of all owner-occupied real estate nationwide.
Sep 11, 2025
Parking Trends in Newly Completed Single-Family Homes, 2024In 2024, 65% of newly completed single-family homes featured two-car garages, according to NAHB’s analysis of the Census’s Survey of Construction data. The share of new homes with three or more car garages stood at 15%, continuing a downward trend from its peak of 24% in 2015 and decreasing 2 percentage points from 2023.
Sep 10, 2025
Year-over-Year Building Material Price Growth AdvancesPrice growth for residential building materials rose for the fourth straight month in August, reaching its highest level since January 2023. Across domestic inputs goods and services into residential construction, service prices decreased in August while goods prices slightly advanced.