Paul Ivanoff

Paul is a Partner in Osler’s Disputes department and is a key contact for the firm’s Construction and Infrastructure practice group. Paul’s practice involves the litigation, arbitration and mediation of disputes arising out of construction and infrastructure projects. He also provides contract administration advice during the course of completion of projects. Paul’s practice covers all aspects of construction law including disputes involving contracts and specifications, power purchase agreements, construction liens, mortgage priorities, delay claims, bidding and tendering matters, negligence claims, bond and insurance claims, and construction trusts.

He advises all project participants on disputes related to a broad range of construction and infrastructure projects including airport facilities, power plants (nuclear, gas, solar, wind and coal), highways, industrial facilities, commercial buildings, civil works facilities and subways. Paul is certified as a Specialist in Construction Law by the Law Society of Ontario and is listed in The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada, Chambers Canada, The Best Lawyers in Canada, The Canadian Legal Lexpert Directory, Expert Guides: The Legal Media Group Guides to the World’s Leading Lawyers, and Canadian Who’s Who.

Representative Work

  • Toronto Transit Commission

    Toronto Transit Commission in connection with the Toronto-York Spadina Subway Extension

  • Toronto Transit Commission

    Toronto Transit Commission in an action brought by a construction contractor in respect of a major subway station and transit line project

  • Toronto Transit Commission in a trial heard over a 14-month period respecting the construction of the Pioneer Village Subway Station and various court proceedings related to the design and construction of the Toronto York Spadina Subway extension
  • Atomic Energy of Canada Limited in an action under a construction all risks insurance policy in connection with the retubing of the Point Lepreau Nuclear Generating Station
  • Ontario Power Authority in proceedings including a court application commenced by Greenfield Energy Centre relating to the amendment of IESO Market Rule 356
  • Atomic Energy of Canada Limited in a dispute with New Brunswick Power regarding the retube and refurbishment of the Point Lepreau Generating Station
  • Northland Power in actions respecting wind and solar power projects
  • Greater Toronto Airports Authority in claims relating to the design, construction and maintenance of air terminal facilities
  • Ontario Power Authority in an arbitration regarding a 900-megawatt natural gas-fired power plant
  • The Regional Municipality of Halton in an action by a contractor pertaining to a wastewater treatment plant
  • Veco Corporation, an American based engineering and construction company, in an Ontario action by Nelson Barbados Group Ltd. involving allegations of conspiracy, fraud and oppression, which focused on the propriety of the Ontario courts assuming jurisdiction over the dispute
  • Stone & Webster Canada L.P. in proceedings against Babcock & Wilcox Canada Ltd. relating to the installation of Selective Catalytic Reduction (SCR) equipment at Ontario Power Generating Stations
  • Vale Newfoundland & Labrador Limited in an action in the Supreme Court of Newfoundland and Labrador by Kaefer Industrial Services regarding the supply of services and materials for the Long Harbour Processing Plant
  • Shaw, Stone & Webster Canada, a leading engineering firm, in a multi-party Ontario action involving allegations of negligence and breach of contract relating to the design and construction of an industrial processing system
  • An Ontario municipality in connection with procurement advice relating to bidding and tendering issues
  • A nuclear technology and engineering company in a dispute relating to the supply and installation of equipment
  • A project owner in an action involving the construction of a co- generation power plant
  • A leading Canadian contractor in various claims and disputes relating to roadway construction
  • Automobile manufacturers in various disputes relating to projects undertaken at automobile assembly facilities
  • A toll highway development company and a technology and services company in insurance actions

Latest Insights

  • Blog Jul 10, 2024

    Beware the contractual limitation period

    A recent Ontario court decision addressed the issue of a contractual limitation period. The decision is a reminder to parties to be mindful of their...

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    Beware the contractual limitation period
  • Webinar May 2, 2024

    Use of artificial intelligence (AI) in infrastructure projects

    Participants will gain valuable insights into the fast-evolving use of AI in the design, management, monitoring and maintenance of infrastructure...

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    Use of artificial intelligence (AI) in infrastructure projects
  • Blog Apr 16, 2024

    Judicial review of adjudicator’s determination granted by Ontario Divisional Court

    The Ontario Divisional Court has released its first decision allowing an application for judicial review of an adjudicator’s determination....

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    Judicial review of adjudicator’s determination granted by Ontario Divisional Court
  • Blog Mar 1, 2024

    Chatbots: who could be liable for the accuracy of the output?

    A recent decision of the British Columbia Civil Resolution Tribunal raises interesting issues regarding the use of AI and the potential for liability.

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    Chatbots: who could be liable for the accuracy of the output?
View all Insights

Awards and Recognition

  • Chambers Canada: Canada’s Leading Lawyers for Business: Recognized in Construction
  • The Canadian Legal Lexpert Directory: Recognized in Construction Law
  • Benchmark Litigation Canada: Recognized in Construction; Dispute Resolution (Litigation Star)
  • Best Lawyers in Canada: Recognized in Construction Law
  • Thomson Reuters: “Stand-out Lawyer”

Media Mentions

  • Osler News Jun 6, 2023

    16 Osler lawyers recognized in Lexpert Special Edition: Infrastructure 2023

    Congratulations to 16 of our lawyers for their inclusion in the Lexpert Special Edition: Infrastructure 2023.

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  • Osler News Jun 15, 2022

    25 Osler lawyers recognized in Lexpert Special Edition: Infrastructure 2022

    Congratulations to 25 of our lawyers for their inclusion in the Lexpert Special Edition: Infrastructure 2022.

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  • Osler News Aug 16, 2021

    Crisis and creativity in construction law conflict resolution – Lexpert

    Delays caused by the COVID-19 pandemic are leading to increased conflicts in the construction industry, as legislative amendments underscore the...

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  • Osler News Jan 27, 2020

    29 Osler lawyers recognized in Benchmark Litigation 2020

    Osler is proud to announce that 29 of our litigation lawyers appear in Benchmark Litigation’s 2020 issue of Benchmark Canada, their annual...

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Community Involvement

  • Wind Energy Institute of Canada, Director

Speaking and Writing

Speaking Engagements

speaker 02/5/2024
Use of artificial intelligence (AI) in infrastructure projects
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speaker 10/11/2022
Construction and Infrastructure Disputes – Specialized Practices and Procedures
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Published Work

  • Ryerson University – Engineering Law Course (Instructor), all Engineering Departments (2015-2024).
  • Osgoode Hall Law School, Osgoode Certificate in Contract Management, Speaker (August 2017, May 2019, March 2021 and June 2023).
  • Contract Termination: Considerations in Terminating for Default or for Convenience, Journal of the Canadian College of Construction Lawyers, 2021
  • Advocates’ Society – Construction Law: Arbitration and Adjudication Advocacy, Speaker (April 2019).
  • The Canadian Institute, EPCM for Mining, Energy and Infrastructure Projects, Speaker (June 2013).
  • Law Society of Upper Canada, Professionalism and Practice Management in the Construction Lien Context, Speaker (January 2013).
  • Ontario Bar Association, Strategic Use of Summary Judgment in Construction Cases, Speaker (March 2012).
  • The Canadian Institute, 21st Annual Construction Superconference, Speaker, (December 2011).
  • Federated Press, 3rd Construction Claims Course, Course Leader and Lecturer (January 2011).
  • Law Society of Upper Canada, Construction Lien Essentials, Speaker (January and March 2011).
  • Osgoode Hall Law School Intensive Workshop, Negotiating Skills for Construction Professionals, Speaker (November 2009).
  • Pre-Trial Discovery Procedure in Canadian Litigation, Construction Checklists: A Guide to Frequently Encountered Construction Issues (edited by Fred D. Wilshusen, Eric A. Berg, et al. Chicago: ABA Publishing), American Bar Association, 2008.
  • Law Society of Upper Canada, Construction Lien Essentials, Speaker (January 2009).
  • Supreme Court of Canada Rules Owner in Tendering Process Owes No Duty of Care to Subcontractors, Osler Update, May 12, 2008.
  • The Canadian Construction Law Dictionary (Judicially Considered), Harvey J. Kirsh, Paul A. Ivanoff, Markham, Ontario:  LexisNexis Butterworths, 2006.



  • University of New Brunswick, LL.B.
  • York University, B.A.


  • English

Professional Affiliations

  • Ontario Bar Association, Construction Law Section, Past Chair
  • Law Society of Ontario
  • Canadian Bar Association
  • The Advocates' Society