About Louis-Pierre Grégoire

Construction disputes, and the contracts that decide who carries the risk on big projects, are the heart of Louis-Pierre Grégoire's work. LP is a partner in Gowling WLG's Ottawa office and a Law Society of Ontario certified specialist in construction law. Clients include owners, contractors, sureties and lenders, among others, and the work runs the length of a project, starting with procurement and the contract itself and ending, when it has to, in an adjudication, an arbitration or a lawsuit.

Grégoire studied civil engineering before law, finishing a B.A.Sc. at the University of Ottawa in 1997 and an LLB there in 2000, with a call to the Ontario bar in 2002. That technical footing matters on the claims LP handles: projects that ran late or over budget, flawed designs, work that didn't perform, and payment fights on either side of the ledger.

Many of these files are large and involve several parties. They've included light rail, marine and road projects (some built as public-private partnerships), energy and industrial plants, transportation systems, hospitals and schools, and major residential developments. On the front end, the partner drafts and negotiates supplementary conditions to CCDC contracts, consultant agreements and custom project agreements for complex delivery models.

LP works in English and French and speaks often on construction law, including the overhaul of Ontario's Construction Act. Grégoire co-wrote the second edition of A Layperson's Guide to the Construction Act and also founded Ottawa's Young Construction Leaders, a networking group for local construction leaders aged 40 and under.

Practice areas

Construction claims

Brings and defends claims for owners and contractors over liens, holdback, breach of trust and surety issues, whether they settle in negotiation or mediation or go to adjudication, arbitration or court.

Infrastructure and P3 projects

Acts for owners and contractors on light rail, marine and road work, including public-private partnership projects with Project Co., where the disputes turn on delay, design errors, scope gaps and cost overruns.

Procurement and construction contracts

Helps owners and contractors plan procurement and drafts, reviews and negotiates prime contracts, subcontracts and building or renovation agreements, along with CCDC supplementary conditions and consultant agreements.

Insurance, bonding and design claims

Pursues subrogated recoveries for insurers after major construction failures, handles disputes over performance bonds and payment bonds for labour and materials, and acts on claims for and against design consultants over errors and omissions on projects like hospitals and aviation facilities.

Education & credentials

A gold certification seal with a checkmarkCertified SpecialistConstruction Law
  • LLB, University of Ottawa (2000)
  • B.A.Sc. (Civil Engineering), University of Ottawa (1997)
  • Called to the bar of Ontario (2002)
  • Certified Specialist in Construction Law (Law Society of Ontario)

Publications & speaking

Memberships & affiliations

  • Ottawa Construction Association: Grégoire is a member.
  • Toronto Construction Association: Grégoire is a member.
  • The Advocates' Society: Grégoire is a member.
  • Canadian Bar Association: Grégoire is a member.
  • Association des juristes d'expression française de l'Ontario: Grégoire is a member.

In the community

  • Grégoire founded Ottawa's Young Construction Leaders (formerly the Ottawa Young Construction Executives' Club), which connects local construction industry leaders aged 40 and under.

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This listing was generated by AI from public sources in October 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on their firm’s website. Confirm Louis-Pierre Grégoire’s licence and standing in the Law Society of Ontario directory ↗

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