Gabriel Lefebvre


[email protected]

Gabriel Lefebvre focuses his practice on construction law, more particularly on matters of engineers' liability and contractors' claims. He represents and advises property owners, contractors, sub-contractors, bonding companies and insurers in matters involving all aspects of the construction industry and the professional liability of architects and engineers.

Gabriel is particularly interested in questions related to:

  • legal hypothecs
  • guarantees
  • calls for tenders
  • licensing and permit requirements
  • claims for extras and impact costs
  • legislation applying to construction, such as the Building Act and the Act Respecting Contracting by Public Bodies

Gabriel participates in preparing cases for litigation and pleads before all courts in the Province of Québec.


  • Represented two insurance companies in Trois-Rivières’ “pyrite” case, one of the biggest trials in the history of Québec’s construction industry
  • Assists and represents various contractors in claims against major institutional work providers
  • Member of the BLG team working for the contractor in charge of the REM construction project
  • Represented various major engineering firms in multi-million dollar cases against the ministry of transportation and municipalities
  • Advises contractors on matters related to claims for extras and impact costs
  • Advises and assists clients on regulatory matters, and negotiates and drafts agreements relating to infrastructure projects
  • His experience in professional liability litigation has endowed Gabriel with a sound knowledge of insurance-related matters
  • Acts as guest speaker at major conferences in the field of construction

Beyond Our Walls

Professional Involvement

  • Chair, Construction Law Section, Canadian Bar Association, Québec Branch
  • Member, Canadian Bar Association
  • Member, Legal Affairs Committee, Association of Consulting Engineering Companies

Awards & Recognitions

  • Recognized in the 2024 edition (and since 2021) of The Best Lawyers in Canada (Construction Law)
  • Recognized in the 2024 edition (and since 2021) of The Canadian Legal Lexpert® Directory (Construction Law)
  • Recognized in the 2024 edition of Benchmark Litigation Canada as a Litigation Star (Construction)
  • Recognized in the 2023 edition of The Legal 500 Canada (Construction).
  • Recognized in the 2023 edition (and since 2020) of The Lexpert®/ROB Special Edition on Canada’s Leading Infrastructure Lawyers.

Bar Admission & Education

  • Québec, 2005
  • Accelerated Leadership Program, Harvard Law School, 2020
  • LLB, Université de Montréal, 2003