Sidney H. Troister, LSM

Tel: 416 777 5432 Fax: 1 888 312 0072


As a leading member and senior statesman of the Ontario Real Estate Bar, Sidney Troister has built an established solutions-oriented practice encompassing all aspects of commercial and residential real estate, leasing, and financing transactions and practice.

With his broad real estate experience, he is consulted regularly by industry, government, title insurers, and lawyers for his expertise, and his practical and creative approach to transaction problem solving. He is a well regarded arbitrator and mediator of real estate and commercial leasing disputes.  He serves as counsel to the Lawyers’ Professional Indemnity Company and title insurers, providing legal opinions, transaction strategy and litigation support regarding the standard of practice of real estate lawyers in Ontario and the enforceability of real estate transactions.

He is a leader in the profession. He is an elected bencher and has chaired important committees for the Law Society of Ontario. He is the author of the preeminent text, “The Law of Subdivision Control in Ontario,” (the Planning Act “bible”), its 4th edition recently published that reflects the most recent amendments to the Act, of which he was instrumental in effecting after more than two decades of championing such changes to the legislation. 

He has dedicated much of his career to leadership in continuing legal education. He has been in the forefront of educating lawyers to changes to the law regarding rent control, title insurance, and title and mortgage fraud.  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 well attended Law Society of Ontario's annual Real Estate Law Summit, which he founded in 2004. A noted educator and sought-after speaker, he frequently presents at continuing legal education programs for the Law Society of Ontario, the Ontario Bar Association, and many local Ontario law associations on a wide range of real estate law-related topics.  He authors and issues a regular Real Estate Bulletin to more than 1500 lawyers advising lawyers across the province to changes in the law and the careful practice of real estate law.

As a testament to his outstanding contributions to the practice of law in Ontario, he was the recipient of the Ontario Bar Association award for Excellence in Real Estate in 2000 and the prestigious Law Society Medal in 2008. Most recently, the Osgoode Hall Law School Alumni Association honoured Sidney with an Alumni Gold Key Award for Achievement in recognition of the numerous contributions and achievements he has made to the practice of law, mentorship and education of others, and advancement of legislation in Ontario.

Lexpert Ranked Lawyer 2023



Sid Troister


Best Lawyers Award Badge


Awards & Recognition

  • Winner, Alumni Gold Key Award for Achievement, Osgoode Hall Law School Alumni Association, 2023
  • Winner, Law Society Medal, 2008
  • Winner, Award for Excellence in Real Estate, Ontario Bar Association, 2000
  • Bencher, The Law Society of Ontario, 2015 – present
  • Ranked lawyer, Real Estate: Zoning/Land Use, Chambers Canada
  • Lawyer of the Year, Real Estate Law in Toronto, The Best Lawyers in Canada, 2015 & 2021
  • Ranked lawyer, Property Development, The Canadian Legal Lexpert Directory
  • Recognized in The Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada
  • Recognized for Real Estate Law, The Best Lawyers in Canada©
  • 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

Publications & Presentations

Presentation Apr 6, 2023

20th Real Estate Law Summit - LSO

Co-chair - Law Society of Ontario's 20th Real Estate Law Summit
Presentation Apr 6, 2022

19th Real Estate Law Summit - LSO

Co-chair - Law Society of Ontario's 19th Real Estate Law Summit
Presentation Apr 20, 2021

18th Real Estate Law Summit - LSO

Co-chair - Law Society of Ontario's 18th Real Estate Law Summit


  • 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