Sidney H. Troister, LSM

Tel: 416 777 5432 Fax: 1 888 312 0072


A senior partner in our Commercial Real Estate Group, Sidney has a very broad business and commercial law practice.

In addition to his traditional real estate law practice involving the purchase, sale and financing of commercial property, he is consulted regularly by industry, title insurers and lawyers for his expertise and his practical and creative approach to real estate problem solving, trouble shooting, and getting deals done. He also serves as counsel to the Lawyers’ Professional Indemnity Company and title insurers, providing opinions, strategy and litigation support regarding the standard of practice of real estate lawyers in Ontario. He is also an arbitrator and mediator of real estate and commercial leasing disputes.

He is considered one of the leading members of the Ontario real estate bar. From 1990 to 2000, he was the co-head of the Real Estate Law section of the Ontario Bar Admission Course. He continues to chair the Law Society of Ontario's annual Real Estate Law Summit which he founded in 2004. A noted teacher, he is a frequent speaker at continuing legal education programmes for the Law Society, the Ontario Bar Association, and many local Ontario law associations on a wide range of real estate law-related topics.

In 2008, he was awarded the Law Society Medal for his contribution to the practice of law in Ontario.

Sidney is the author of "The Law of Subdivision Control in Ontario", a text on Section 50 of the Planning Act and is generally considered by Ontario lawyers as the leading expert on subdivision control in the province. He co-authored "Real Estate Conveyancing in Ontario: A Nineties Perspective", for the Lawyers’ Professional Indemnity Company, which analyzed the role of lawyers in real estate transactions in Ontario. He is a contributing author to "Agreements of Purchase and Sale" and to the 5th edition of "Falconbridge on the Law of Mortgages".

Sidney has authored special bulletins for the legal profession on mortgage fraud in real estate transactions, published annotations on leading judicial decisions and issued cautions to the profession on the standard of real estate practice. He is a past member of the Executive of the Real Property Section of the Ontario Bar Association and was the co-chair of the 2002 Special Lectures of The Law Society of Ontario. He chairs The Law Society of Ontario’s Annual Real Estate Law Summit. In 2015, he was elected a Bencher (governor) of the Law Society of Ontario. Much in demand as a speaker, Sidney has been a leader and educator in continuing education programmes for lawyers in Ontario.

Sidney has recently been inducted into the Canadian Academy of Distinguished Neutrals (CADN). The Canadian Academy of Distinguished Neutrals is an invitation only professional association whose membership consists of ADR professionals distinguished by their hands-on experience in the field of civil and commercial conflict resolution.

Visit my Real Estate Dispute Resolution site

Best Lawyers Award Badge

Sid Troister


Best Lawyers Award Badge


Awards & Recognition

  • Awarded the Law Society Medal 2008
  • Awarded the Ontario Bar Association Award for Excellence in Real Estate 2000
  • Elected Bencher of the Law Society of Upper Canada 2015
  • Recognized in Chambers Canada — Real Estate: Zoning/Land Use
  • Recognized as "Lawyer of the Year" by The Best Lawyers in Canada for Real Estate Law in Toronto in 2015 & 2021
  • The Canadian Legal Lexpert Directory - Professional Liability and Property Development
  • Recognized in The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada
  • Recognized in The Best Lawyers in Canada - Real Estate Law
  • Recognized AV® Pre-eminent Peer Review Rating, Martindale-Hubbell


  • ADR Institute of Ontario
  • American College of Mortgage Attorneys
  • Ontario New Home Warranty Plan, Roster Arbitrator
  • The Canadian Academy of Distinguished Neutrals (CADN)

Community Involvement

  • Sporting Life 10K annual participant and fundraiser for Camp Oochigeas and still running 10K faster than his age
  • Ride for Heart annual participant and fundraiser
  • Holy Blossom Temple Out of the Cold Project, Dishwasher
  • Champion Bowler, the Law Society Feed the Hungry Bowl-a-thon


  • The Advocates’ Society Mediation Workshop, July 1997
  • Arbitration and Mediation Institute of Ontario Inc; Arbitration Course Part 2, December, 1995
  • LL.B., Osgoode Hall Law School at York University, 1972
  • B.A., York University, 1969
  • Osgoode Hall Law School of York University – The Prize in Income Tax 1972
  • York University Entrance Scholarship 1966


  • Certified by the Law Society of Ontario as a Specialist in Real Estate Law 2004
  • Called to the Ontario Bar, 1974
  • Designated Chartered Arbitrator (C. Arb.): ADR Institute of Canada