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 will feature 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.