Ecological architects with offices in Aspen, Colorado and Lawrence, Kansas.

Woman owned firm in Salt Lake City, Utah specializing in environmentally sustainable architecture.

Offering sustainable architecture, ecological design and building conservation. Based in Fife, Scotland,

Architecture with conservation in mind. Located in Bath, UK.

Salt Lake City, Utah design firm provides its design philosophy, project gallery and company information.

London-based firm specialising in the design and realisation of sustainable, urban, mixed-use projects.

Design, construction services and environmental architecture, as well as a real estate consultant in the Western US and South America. Includes brief introduction and links.

Offers examples of sustainable architecture, housing and arts projects in the UK along with a practice profile and contact details. Located in Dunbar, UK.

Designers with experience in ecologically sensitive green building, green architecture and community based planning projects. Portfolios, awards, and contact information.

Sustainable architectural design firm based in Sydney, Australia specialising in single residential, institutional and small-scale commercial architecture.

Offers a complete range of architectural services, from site planning to interior design. Oakland, California.

Design-build firm involved in the environment and building sustainable architecture. Houston, Texas.

Berkeley solar architect uses alternative building systems and references indigenous precedent.

Full- service planning, architecture and interior design firm in New York City specializing in environment / sustainable and human-centered architecture and design.

Boulder, Colorado based full-service architecture firm serving the Rocky Mountain region of the U.S.

Offering architecture and energy and environmental consultancy services for residential, commercial, education and arts/leisure. Located in London, UK.

Architectural firm specializing in alternative construction and environmentally appropriate technologies, such as straw bales, earth-rammed tires, pumice-crete, paper-crete and adobe. Contains project photos.

A multi-discipline firm offering sustainable research, consulting and design services to private, corporate and public clients. Located in Kansas City, Missouri.

Architect's studio in Amsterdam, The Netherlands, specializing in an ecological approach. Profile, projects and commentary on modern architecture and earth building.

Offers environmentally-responsive, high performance, green home design, architecture counseling and technical consulting services. Houston.

Sustainable ecological designs for residential and commercial projects throughout the UK.

Chicago-based firm focused on effective design and planning strategies that are environmentally-responsive to issues such as energy conservation, historic preservation and community-based planning.

Winchester, UK firm offers its philosophy of sustainable design and portfolio of projects.

Portfolio of commercial, residential, medical and corporate architecture with a focus on sustainable design. Includes profile and contacts.

Conceptual design, sustainable building and urban design research. Offices in Switzerland and Germany.