Liane Langstaff Associate

Speaks:  English

Year of Call: 2016 - Ontario

Primary phone: +1 416-814-5637

Fax: +1 416-862-7661


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Primary office:  Toronto

Liane Langstaff

Liane Langstaff is an associate lawyer in Gowling WLG's Toronto office, practising in the areas of environmental law, indigenous law and land use planning law.

Liane has a diverse practice, serving corporate, municipal and indigenous clients. She is a passionate advocate and provides comprehensive legal advice on a range of environmental issues, including:

  • Environmental assessments
  • Environmental and energy approvals and permitting
  • Climate change regulatory compliance
  • Regulatory investigations and enforcement
  • Contaminated sites litigation
  • Land-use planning, zoning and cultural heritage conservation

As an Environmental Sciences (BSc), Law and MBA graduate, Liane uses her technical expertise, legal skills and business acumen to meet her clients' needs. As a result of her former role as a law clerk to Justices Weiler, Juriansz, Simmons and Brown of the Court of Appeal for Ontario, she leverages an intimate knowledge of the courts to represent her clients in complex litigation proceedings.

Liane brings broad experience in the environmental field, having previously been a sustainability consultant to the food and beverage industry. She has held various positions in government, with a focus on municipal planning, and has conducted extensive research, working with Aboriginal communities in Northern Canada.

An alumnus of Osgoode Hall Law School's Intensive Program in Aboriginal Lands, Resources and Governments, she strives to participate in the ongoing project of reconciliation in Canada.

Liane is committed to giving back to her community through environmental education. As part of the Board of EcoSpark, she endeavours to connect youth and their communities to their natural environment through citizen science. She is also active in training the next generation of lawyers, having delivered guest lectures and facilitated aboriginal law negotiation simulations for students at Osgoode Hall Law School, York University and the Bora Laskin Faculty of Law, Lakehead University. As part of the Climate Change Lawyers Network, she has brought together lawyers and other professionals to better understand current developments in climate change law and policy.

Career & Recognition

Filter timeline:
  • 2016

    • Qualifications (Year of Call/Admission, etc.)
      Year of Call, Ontario
    • Career
      Judicial Law Clerk to Justices Weiler, Juriansz, Simmons and Brown, Court of Appeal for Ontario
  • 2015

    • Education
      July 2015
      Osgoode Hall Law School, York University, JD
    • Education
      July 2015
      Schulich School of Business, MBA
    • Rankings & Awards
      June 2015
      Hennick Medal for Academic Excellence
    • Rankings & Awards
      June 2015
      Osler, Hoskin & Harcourt LLP Research Prize in Corporate/Commercial Law
    • Rankings & Awards
      June 2015
      Arthur Charles Pape Memorial Prize for Native Rights
    • Rankings & Awards
      February 2015
      Business for a Better World Case Competition, World Economic Forum, Third Place
    • Career
      Business Development Student, Ontario Power Generation (Osgoode Intensive Program in Aboriginal Lands, Resources and Governments placement)
  • 2014

    • Rankings & Awards
      April 2014
      Canadian National Corporate and Securities Law Moot, Third Place
    • Career
      Summer Student and Student-at-Law, Environmental Law Group, Gowling WLG
  • 2013

    • Career
      Research Assistant to Dr. Dayna N. Scott, Osgoode Hall Law School (Environmental Law & Investment Arbitration)
  • 2012

    • Rankings & Awards
      October 2012
      Joseph Armand Bombardier Canada Graduate Scholarship
    • Rankings & Awards
      July 2012
      BLG Professional Excellence Award
  • 2011

    • Education
      July 2011
      University of Guelph, BSc (Hons.)


  • Ontario Bar Association
  • Canadian Bar Association
  • Climate Change Lawyers Network

Articles & presentations

"Climate Change Regulatory Update - The Feds Double Down on Carbon Pricing" (October 2018)

"Ontario's cap and trade program ends and Federal Backstop looms: Implications for Ontario businesses"

"Renewable Energy Projects with Northern Ontario First Nations: Considerations, Challenges and Solutions", Lecture and Aboriginal Law Simulation Negotiation, Osgoode Hall Law School, York University (January 2016) and Bora Laskin Faculty of Law, Lakehead University (November 2016)

Contributor on Canadian climate change law in David Estrin's Business Guide to Environmental Law (2016 update)

"SCC recognizes federal jurisdiction to deal with Métis and non-status Indian peoples" (April 2016)

"Federal budget & low carbon investments: Canada puts its money where its mouth is" (March 2016)

"Sustainability shift: The evolution of Canadian water policy" (September 2015)

"Sweating the small stuff: Canada's emerging regulatory approach to nanomaterials" (October 2014)

Client work highlights

Liane has appeared before the Superior Court of Justice on contaminated lands disputes as well as land-use planning and cultural heritage matters. She has experience managing technical experts and navigating administrative tribunal proceedings, including the Environmental Review Tribunal (ERT) and Local Planning Appeal Tribunal (LPAT). She has assisted her clients in mediations, settlement conferences and international arbitrations.