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240 Markland Drive: Achieving Net-Zero with Geothermal Retrofit

March 2025

240 Markland Drive is a 10-storey residential building in Etobicoke, Ontario, with a gross floor area of 12,557 m² and 113 units. The building underwent a transformative deep energy retrofit, completed by Carttera in 2022. In collaboration with Geosource Energy Inc., the retrofit incorporated low-carbon geothermal systems for both heating and cooling. These geothermal systems now serve both the original rental building and the new residential development on-site. As a result of the retrofit, 240 Markland Drive achieved Zero Carbon Building certification under the Canada Green Building Council’s ZCB-Performance Standard. This webinar featured insights from both Carttera and Geosource Energy Inc. on the key components of the retrofit, the integration of geothermal energy systems, and the steps taken to achieve net-zero operations.

  • Webinar Recording
  • Meeting Summary

Additional Resources

  • 240 Markland Drive – Canada Green Building Council
  • Zero Carbon Building Performance Standard Version 2 – Canada Green Building Council
  • Government of Canada Launches the First Clean Economy Investment Tax Credits
  • BILL C-59
  • Canada Mortgage and Housing Corporation (CMHC) MLI Select

If you would like a copy of the slide deck, please contact us at cap@cleanairpartnership.org

© 2026 Climate Action Council. Climate Action Partnership