Patrick G. Duffy

Patrick G. Duffy

Stikeman Elliott LLP

Recognized since 2019

Toronto, Ontario

Practice Areas

Construction Law

Energy Law

Energy Regulatory Law

Environmental Law

Municipal Law

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Patrick Duffy is a partner and Co-Head of the Projects & Infrastructure Group. His practice focuses on project development that includes municipal and planning law, environmental permitting and litigation, energy regulation, and Indigenous engagement. He is highly sought after for his considerable experience with environmental assessments and other regulatory approvals in a variety of sectors, including renewable and non-renewable electricity generation, electricity transmission, mining, transit and transportation, aggregate quarries, and waste management. Patrick also advises clients in responding to environmental inspections, investigations and prosecutions at both the provincial and federal levels.

Patrick is an experienced advocate and has appeared before the Supreme Court of Canada, the Federal Court of Canada, all levels of courts in Ontario and a variety of administrative tribunals, including regular appearances before the Ontario Energy Board and the Ontario Land Tribunal. He has acted for both provincial and municipal governments and many of his mandates involve administrative or public law issues, including issues related to public and Indigenous engagement.

Patrick is known for his strength in advising on the business interests of energy clients and handling the full gamut of regulatory proceedings in connection with the development of energy projects. He also has expertise in public procurement processes and has been involved in all stages in a number of sectors on both the customer and bidder side. He helps draft the terms of public procurements, assists proponents in responding to procurements, and represents proponents in procurement-related litigation.

  • 5300 Commerce Court West
    199 Bay Street
    Toronto, ON M5L 1B9

Stikeman Elliott LLP
Headquarters: Toronto, Ontario

191 The Best Lawyers in Canada awards

39 Best Lawyers: Ones to Watch in Canada awards

Law Firm of the Year Badge Visit Website View Firm Profile

Recognized in The Best Lawyers in Canada 2024 for work in:
  • Construction Law
  • Energy Law
  • Energy Regulatory Law
  • Environmental Law
  • Municipal Law


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