O'Sullivan Estate Lawyers LLP
Excellence. Customized Solutions. High -Touch Service.
For over 20 years, we've been distilling big-firm expertise and recreating it in a discreet, boutique firm setting.
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Trust and Estate Legal Services

We established our firm over 20 years ago to focus 100% on trust and estate legal work.

We provide domestic, cross-border and multijurisdictional trust and estate advice in a comfortable, discreet and personal boutique firm setting. From planning to administration to dispute resolution, our years of practical experience, combined with a deep understanding of your unique goals and objectives, enable us to provide bespoke solutions in a responsive manner that optimize your situation and ensure your peace of mind.

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Recognized Leaders in the Field

Our lawyers are not only legal practitioners but also leaders in our profession.

All of us are active speakers and thought leaders. We are committed to staying at the forefront of the law, and leading the charge.

We are also a top-ranked, peer-recognized firm. O'Sullivan Estate Lawyers has been awarded Boutique Firm of the Year 2019/20 at the STEP Private Client Awards held in London U.K. on September 25, 2019. Margaret O'Sullivan is recognized by Chambers Canada High Net Worth 2019 as one of the top six private client lawyers in Canada. Margaret and Susannah Roth are both recognized by The Best Lawyers in Canada 2020 and the Canadian Legal Lexpert Directory 2019 as leading practitioners.

  • 2019-20 Top 10 Wills, Trusts & Estates Boutique
  • Step Private Client Awards | Finalist | Boutique Firm of the Year
  • Margaret R. O'Sullivan 2019 Best Lawyers
  • O'Sullivan Estate Lawyers LLp 2019 Best Lawyers
  • Susannah Roth Best Lawyers 2020
  • Canadian Legal Lexpert Directory
  • Who's Who Legal Private Client 2019
  • WWL Who's Who Legal | Canada 2019
  • Top Ranked Chambers HNW | 2019 | Margaret R. O'Sullivan
  • PCGE 2018
  • The Law Reviews Expert panel 2019
  • Fellow The American College of Trust and Estate Counsel
  • Step Canada

“The O’Sullivan team has deep domestic, international and cross-border expertise, and their depth of trust and estate planning knowledge is close to unparalleled. I feel comfortable referring my clients, because the nature of their advice is top-drawer. They are true experts.” - Toronto Lawyer

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Trust and estate essentials

Read our 20th anniversary special edition book Trust and Estate Essentials:  Achieving Success in Family Succession.  It will help clarify and demystify major issues that arise in family succession.


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Contact Us to Discuss Your Needs

Our lawyers are ready to meet with you, listen to your needs and explain how we can help. Contact us to set up a meeting.

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