Atty. Catherine DiMarco
Catherine DiMarco has more than 17 years of construction and general civil litigation experience. Certified by the Law Society of Ontario as a specialist in construction law, with a deep understanding of the industry, Catherine provides practical guidance on managing risks during contract negotiations, and assists with project delivery plans.
Profile Summary
About Catherine DiMarco at a glance
Catherine DiMarco is a construction attorney based in Toronto, Ontario, practicing at Blaney McMurtry LLP. Recognitions include Best Lawyers in America — Construction Law (2026), Best Lawyers in America — Awards: (2026), and Best Lawyers in America — The (2026). Serands clients in Toronto, ON and the surrounding metropolitan area.
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About
- Catherine DiMarco has more than 17 years of construction and general civil litigation experience
- Certified by the Law Society of Ontario as a specialist in construction law, with a deep understanding of the industry, Catherine provides practical guidance on managing risks during contract negotiations, and assists with project delivery plans
- When disputes arise, she represents different sectors of the construction industry on claims, or on the defence of claims
- These include owners, general contractors, subcontractors and suppliers, as well as design and engineering professionals
- Clients appreciate her ability to distill and prioritize key issues and salient facts that arise in complex construction disputes
- Her practical and creative approach to dispute resolution is guided by both business drivers and legal remedies
- Catherine has also defended public authorities, including municipalities, in matters involving allegations of negligent design, supervision and inspection
- She regularly attends at the Superior Court of Justice and before arbitrators on a variety of construction and civil matters
- Recognized by the Best Lawyers of Canada™ as a leading lawyer in construction law, Catherine is also a Fellow of the Construction Lawyers’ Society of America
- In addition, she is vice-chair and executive member of the Ontario Bar Association Construction and Infrastructure Law Section
- Previously, she served as a member of the Executive Committee and Board of Directors of the Canadian Construction Association
- A frequent speaker at industry and client seminars, Catherine has also taught on construction law at the George Brown College School for Architectural Studies and Construction Management and Trades
- She is a volunteer with ProBono Ontario, assisting low-income Ontarians in addressing legal problems that interfere with their ability to lead secure, healthy, and productive lives
Practice Areas Explained
Catherine DiMarco's Areas of Practice
Each practice area below reflects the types of cases Catherine DiMarco handles, with a brief overview of what that area of law covers.
Catherine DiMarco is one of 40,689 construction attorneys indexed nationally. Browse construction attorneys in Ontario →
Jurisdictional Context
Why local counsel matters in Ontario
Practicing law in Ontario. Legal matters in Ontario are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Toronto are typically filed in the local municipal court or the appropriate Ontario state district court, depending on subject matter and amount in controversy. An attorney licensed in Ontario brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Ontario courts without local counsel or pro hac vice admission.
Looking for additional Ontario attorneys? Browse all attorneys in Toronto or all attorneys in Ontario.
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