Evan Barz

Evan is a member of Osler’s Regulatory, Indigenous and Environmental group, and is a member of Osler’s Disputes Department.

Evan’s regulatory practice involves advising businesses regarding matters related to the environment and environmental laws, including waste diversion, environmental permitting, transportation of dangerous goods, renewable energy projects, contaminated site remediation, toxic substances regulations and general environmental regulatory compliance. He also assists clients through the environmental aspects of commercial transactions, including mergers and acquisitions, land transactions, and debt and equity offerings.

Evan also maintains a commercial litigation and dispute resolution practice with a particular emphasis on environmental and land litigation. He has considerable experience conducting environmental litigation, including civil actions, administrative tribunal proceedings, and defence of prosecutions.  Evan provides advice on land use planning matters and regularly appears before the Ontario Land Tribunal regarding Planning Act appeals.

He also advises landowners and authorities on expropriations, including advising on expropriation strategy and preparing required documents in accordance with the Ontario Expropriations Act and the Ontario Energy Board Act.

Evan graduated with honours from the J.D. program at the University of Ottawa’s Faculty of Law. He previously obtained an Honours Bachelors of Education degree at Queen’s University and an Honours Bachelor of Arts degree at the University of Ottawa. Prior to joining Osler, he worked as a secondary school teacher in an Ontario school board.

Representative Work

  • Advising a world leading construction company in disputes resulting from several projects related to a significant Ontario transit project
  • Representing an Ontario construction company engaged on public infrastructure projects in its insolvency proceedings under the Companies Creditors Arrangement Act
  • Representing a full service Ontario construction company in disputes involving construction liens and trusts
  • An American products distributor regarding cross-border general environmental regulatory compliance
  • Wholesale and retail supplier of agricultural products in its successful defence of a prosecution under provincial pesticides legislation
  • A land developer in a complaint to the Ontario Energy Board regarding a breach of an electricity distributor’s distribution obligations
  • A Canadian corporation in its defence of regulatory or quasi-criminal charges

Latest Insights

  • Osler Update Jun 7, 2024

    Fundamental changes made to Planning Act appeals as Bill 185 receives royal assent

    On June 6, 2024, the Cutting Red Tape to Build More Homes Act, 2024 (Bill 185), was given royal assent, bringing into force sweeping changes to the...

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    Fundamental changes made to Planning Act appeals as Bill 185 receives royal assent
  • Osler Update Apr 11, 2024

    Ontario government announces proposed amendments to Planning Act and Development Charges Act

    On April 10, 2024, the Ontario government introduced Bill 185, the “Cutting Red Tape to Build More Homes Act, 2023”. The Bill proposes to repeal...

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    Ontario government announces proposed amendments to Planning Act and Development Charges Act
  • Blog Feb 12, 2024

    Ontario releases new regulations for carbon storage

    New regulations in Ontario pave the way for carbon storage demonstration projects using private wells. Richard King, Jake Sadikman, Jennifer Fairfax,...

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    Ontario releases new regulations for carbon storage
  • Osler Update Jan 5, 2024

    Regulation of ‘forever chemicals’ (PFAS) in Canada

    The federal government recently announced its intention to designate PFAS as a class of toxic substances under CEPA.

    Read more
    Regulation of ‘forever chemicals’ (PFAS) in Canada
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Awards and Recognition

  • Chambers Canada: Canada’s Leading Lawyers for Business: Recognized in Environmental Law

Community Involvement

  • Law Help Ontario, Duty Counsel Volunteer

Speaking and Writing

Speaking Engagements

speaker 18/7/2018
Document Management and Discovery: Tips, Traps and Best Practice
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  • University of Ottawa, J.D. (Honours)
  • Queen’s University, B.Ed. (Honours)
  • University of Ottawa, B.A. (Honours)


  • English

Professional Affiliations

  • Law Society of Upper Canada
  • Ontario Bar Association
  • Canadian Bar Association