Louis-Pierre Grégoire

Louis-Pierre Grégoire (L-P) is a partner in Gowling WLG's Ottawa office. He is certified by the Law Society of Ontario as a specialist in construction law, and also holds a civil engineering degree.

L-P's passion is construction. His practice focuses on construction law, commercial litigation and dispute resolution. He advises many parties in the construction industry, including: financial institutions, owners, contractors, subcontractors, material suppliers, entrepreneurs, consultants (engineers and architects), manufacturers, building officials and home inspectors.

L-P is also an active member of trade and industry associations, including as a founding member of the Ottawa Young Construction Leaders, a youth-focused networking group within the Ottawa Construction Association. He is also a frequent speaker on various topics related to the construction sector, including, in particular, the modernization of the new Construction Act in Ontario.

He is regularly cited by leading publications, including Best Lawyers and Lexpert, for his leadership and experience in the area of construction law. He is a problem solver by nature, and is best known for his practical risk-based advice.

Fluently bilingual, L-P practises in both English and French.

Career & Recognition

Filter timeline:


  • Association des juristes d'expression française de l'Ontario
  • Canadian Bar Association
  • Ottawa Construction Association
  • The Advocates' Society
  • Law Society of Ontario
  • Toronto Construction Association

Representative Work

  • Represented a major Canadian airline in connection with a $2 million claim against consultants for design errors.
  • Represented a teaching hospital in Ottawa and a general contractor in a series of proceedings in connection with a $10 million claim for electrical design errors committed by professional consultants (engineers and architects) in a renovation project.
  • Defended the interests of the City of Ottawa in a civil action concerning the title of a property.