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Ann A. Hatsios

Ann A. Hatsios
Areas of Expertise: ,


B.A.A. (Hons.), Ryerson University (1997)
M.B.A., Schulich School of Business, York University (2002)
J.D., Osgoode Hall Law School, York University (2008)
Osgoode Certificate in Construction Law, 2017

Called to the Ontario Bar, 2009

Other Languages



Ann Hatsios is a Member of the Construction and Commercial Litigation Practices.

Ann has a wide-ranging commercial litigation practice, focusing on construction litigation. She has represented builders, developers and trades in construction lien and breach of trust actions under the Construction Act. She has negotiated contracts for clients in the pre-construction phase and has worked out interim agreements when disputes arise during the course of projects. She has acted for individuals, small businesses and large corporations in a broad range of business disputes including commercial leases, defamation, and breaches of contract. Ann has received advanced training in mediation and arbitration and has a practical business sensibility from her pre-law experience in corporations.

Ann has appeared before the Ontario Superior Court, Ontario Divisional Court and the Ontario Court of Appeal, and has represented clients in quasi-criminal and tribunal matters.


  • Member, Canadian Bar Association
  • Member, Ontario Bar Association
  • Member, Peel Law Association


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We have used over 10 Pallett Valo lawyers on different matters and find that they are always responsive.
Dr. Don Pinchin, Pinchin Environmental Ltd.