Lloyd Alter

Design Editor

Lloyd Alter


Architecture & Design, Sustainable Design, Interior Design


University of Toronto


Lloyd Alter has been an architect, real estate developer, and prefab entrepreneur. He now teaches Sustainable Design at Ryerson School of Interior Design.



Alter has been writing for Treehugger since 2005 about architecture, design, transportation, and planning. He is design editor and was previously managing editor. He has written for MNN since 2015. He has contributed to The Guardian, Corporate Knights Magazine, Azure Magazine, Architectural Record, and Greensource.

He has been a regular speaker or moderator at Passive House conferences in Seattle, Vancouver, New York City, Boston, Vienna, and Munich. He Has also spoken about green building in Vancouver, Toronto, and Moose Jaw, Saskatchewan.

Prior to writing, Alter was a promoter of tiny homes and prefabricated housing, lecturing on prefab at conferences in Los Angeles, San Francisco, and Austin, Texas. He has worked as a real estate developer, building condominiums in Toronto, Canada, and as an architect.

Alter was Chairman of the Toronto Society of Architects, Vice President of the Ontario Association of Architects, and President of the Architectural Conservancy of Ontario.

Awards and Publications

  • 2014 USGBC Leadership Award for promotion of green building
  • 2015 Mary Millard Award for contribution to architectural preservation
  • Ontario Renews Award and two Toronto Historical Board commendations for architecture and development work
  • Author of "Living the 1.5 Degree Lifestyle" (September 2021)



Alter has a Bachelor of Architecture, Alpha Rho Chi medal, from the University of Toronto. He was admitted to the Ontario Association of Architects in 1979.


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