System Downtime Notification
On Saturday, November 1, 2014 from 11:00 PM EST to November 2, 2014 7:00 AM EST, usgbc.org will be offline for site maintenance.
Email us or call 1-800-795-1747 for assistance. Thanks for your patience.
Please upgrade your browser. This site requires a newer version to work correctly. Read more

What are Addenda?

Answer

Addenda incorporate changes and improvements to LEED rating systems and reference guides to help clarify, correct, interpret or provide alternative language. Addenda are subject to USGBC committee review and are published as frequently as quarterly.

Can't find what you're looking for?

Ask a question

Have a question or comment?

800-795-1747

(within U.S.)

202-742-3792

(outside U.S.)

M-F 9:00 AM to 5:30 PM EST


Billing

U.S. Green Building Council
P.O. Box 404296
Atlanta, GA 30384-4296


Location

2101 L Street, NW
Suite 500
Washington DC 20037
Map