About Us

We were established to transform built environments, helping humanity survive and thrive in today’s polluted world.

Our clients include architects, designers, and agencies working in the “built environment” and organizations that want to enable themselves to face an uncertain future with new capacity.

We landed on the name, “AFFECTINGCHANGE,” because we are well known for our ability to “affect” how change happens and for revealing the opportunities for making conscientious choices on their projects.

Our logo represents the power of the mountain in the landscape—we stand for what is possible for humanity—everything else—the wind, the water, the air, moves around us. Our clients do the change in the world and we enable and empower them to stand, like a mountain, for what is possible.

We enable organizations to create facilities that enable them to accomplish their mission and purpose, while minimizing their impact and possibly even enabling ecosystem restoration and making a positive social impact.

With projects flung across the globe, we have won more than 75 awards.

Contact us today to learn how you can create the change you want to see in the world.

Sandra Leigh Lester


Founder and CEO


Sandra is trained in architectural science, change management and organizational development. She is a self-taught registered Interior Designer. She has a passion for wellness, health and fitness and is a Certified Personal Trainer and Zumba Instructor. She taught the LEED-accreditation prep course for HOK Architects and the Certified Sustainable Building Advisor course for the Canada Green Building Council and is a LEED-accredited Professional in Building Design and Construction and a Certified Sustainable Building Advisor.


Bachelors of Technology in Architectural Science, Ryerson University
Masters Certificate in Organization Development, Schulich


Certificate in Change Management from the Canadian Organizational Development Institute (CODI)
NCIDQ-certified and Registered Interior Designer (ARIDO IDC)
LEED-accredited Professional in Building Design and Construction (LEED AP BD+C)
Certified Personal Trainer Specialist (PTS)
Certified Sustainable Building Advisor (CSBA)

Consultant to:
• HOK Architects
• Perkins+Will Architects
• LAT49 Architects
• Colleges Ontario
• The Atmospheric Fund
• Ministry of Environment and Climate Change
• Ministry of Health and Longterm Care
• Ministry of Infrastructure 
• Humber River Hospital
• Shorefast Foundation (Fogo Island Inn)
• The City of Toronto
• The Government of Ontario
• The Government of Newfoundland and Labrador

Aided in the creation of the $500 million Low-Carbon Innovation Fund for the retrofit of College and Universities across the Province.

Teaching Experience

• Visiting Professor and Adjunct at the University of Manitoba
• Lead Instructor, Certified Sustainable Building Advisor Course, Canada Green Building Council
• Part-time Instructor, University of Technology Sydney (UTS)
• Part-time Instructor, Ryerson University
• Part-time Professor, Centre for Construction & Engineering Technologies, George Brown College


Let's Work Together

Whether you are looking to renovate your existing building or create a new facility, we can help!

Contact Us