American Institute of Architects  
AIA helps coordinate the building industry and the architecture profession to ensure the advancement of living standards through an improved environment. AIA’s Committee on the Environment initiated the Environmental Resource Guide Project that includes assessments, articles, and case studies of the environmental and resource qualities of building methods and materials, and annually identifies the Top Ten Green Building Projects. AIA also offers training, workshops, and publications. 

Architecture and Building Guide
A huge reference of links related to architecture and building, with a Green Design section.

Building Environmental Science and Technology (BEST)
Provides technical and information services related to building practices, development, energy policy and the environment. Website offers a number of useful resources.

Buildings
DOE’s Energy Efficiency and Renewable Energy (EERE) site provides an alphabetical listing of many organizations focusing on buildings topics.

Center for Maximum Potential Building Systems
A nonprofit education, demonstration, and research organization focusing on appropriate technologies and sustainable design practices for a variety of users, including regional planning agencies. Web site includes a publications list, information on selected projects, and links to other resources.

Center for Resourceful Building Technology
A project of the National Center for Appropriate Technology, dedicated to promoting environmentally responsible practices in construction. Its Web site includes information on research and demonstration projects, and the online Guide to Resource Efficient Building Elements.

Conservation Fund Green Infrastructure Program
The Fund’s Green Infrastructure Program represents a new conservation approach that allows land planners and conservation professionals to forge a stronger link between land use and land preservation. The Fund works with the public and private sector to promote protection, management and resource planning activities that are proactive, holistic, multi-functional and multi-scale.

Congress for the New Urbanism
(CNU) is a San Francisco-based non-profit organization that works with architects, developers, planners, and others involved in the creation of cities and towns, teaching them how to implement the principles of the New Urbanism. These principles include coherent regional planning, walkable neighborhoods, and attractive, accommodating civic spaces.

Cyburbia: The Planning and Architecture Internet Resource Center
Provides links to a large number of resources focusing on planning, architecture, and the built environment, including message boards and discussion groups. Site is organized by topic area and includes a search engine.

Ecological Design Institute
Creates "innovative design solutions that link nature, culture and technology to reintegrate the needs of human society within the balance of nature."

Energy & Environmental Building Association
A non-profit organization that promotes energy-efficient and environmentally-responsible buildings and communities. Provides information and training to a variety of audiences, as well as a list of publications.

Florida Green Building Coalition
This Florida group has developed a Florida Green Development Designation Standard that provides both the criteria and the process for certifying a green development in the state.

Global Ecovillage Network
The Global Ecovillage Network links and supports sustainable settlements worldwide. Their website offers a searchable database of ecovillage communities, listings of events and resources on sustainable communities.

GreenAlliance
GreenAlliance is a trade name of the Alliance for Green Development Inc., a New Mexico nonprofit organization working to promote, educate, and integrate the comprehensive use of green principles that result in livable and sustainable communities.

Green Building Alliance
A Pittsburgh-based nonprofit organization that provides information and assistance to facilitate green building efforts. Programs and services include education, technical assistance, research documentation, development projects, and a green building network.

Green Building Information Council
A Canadian nonprofit centered around energy and environmental issues in the buildings sector, provides a host of useful information at this Web site, including databases of Canadian building contacts and an annotated bibliography on energy efficiency in buildings, a newsletter, and a list of links to other information resources.

Green Building Internet Resources
Provides links to many organizations that focus on green buildings topics.

Green Building Materials Virtual Sample Room
Includes tips for greening a construction or renovation project, a list of green suppliers, a virtual sample room with product pictures and descriptions, and more information.

Green Buildings
Identifies many organizations that offer technical assistance, printed materials, and other assistance on green building topics.

Growing Greener
This project of the Natural Lands Trust is encouraging Pennsylvania communities to adopt conservation design concepts in planning and development regulations.

The New York City Department of Design and Construction has its High Performance Building Guidelines available on-line. This document serves as the basis for implementing sustainability into municipal design and construction activities. To access, go to the above link, scroll down to "What's New," and then click on High Performance Building Guidelines. (Note: this is a .pdf document.)

The Not So Big House: A Blueprint for the Way We Really Live
Focuses on the concept of building houses more efficiently and using resources more effectively. Includes a host of information on topics such as simplicity, sustainability, and energy-efficiency, as well as case studies and links to other valuable resources.

Oikos: Green Building Source
Site includes a searchable database, called REDI, of more than 1,700 companies that offer green building products. You’ll also find information on books, videos, and software related to green building and design, a product gallery of new and interesting products, useful information on sustainable design and construction, and a newsletter filled with ideas for making your building project more energy- and resource-efficient.

Partnership for Advancing Technology in Housing (PATH)
A public/private sector initiative that seeks to expand the development and utilization of new technologies to make American homes stronger, safer, and more durable; more energy-efficient and environmentally-friendly; easier to maintain and less costly to operate; and more comfortable to live in. Web site includes information on Best Practices, a Technology Inventory, and other resources.

Rocky Mountain Institute
Provides a number of services, including consulting services on green real estate development, and a number of publications on resource-efficient buildings and other topics.

Seaside Institute
Focuses on a return to traditional neighborhood planning, using Seaside, Florida, as a "living laboratory." Offers a number of forums and conferences on architecture, planning and urban affairs.

Sustainable Architecture, Building & Culture
"A compendium of links and content oriented to the global community of ecological and natural building proponents." Topics include Bioregional Planning, Appropriate Technology, EcoVillages & Communities, and Transportation.

Urban Land Institute
Offers courses, publications and a magazine that address urban land use topics such as infill development, environmentally sensitive development, and community revitalization.