Mark O’Riordan BL

Mark O’Riordan is a Barrister, Mediator, and Trust & Estate Practitioner specialising in the areas of succession law, probate, trusts, and equity.  He read law at University College Dublin (BCL 1999; and LLM by research thesis 2003) and the Hon Society of King’s Inns (BL 2001).  At University College Dublin, he was Faculty of Law Scholar and Government of Ireland Scholar.

Mark was a founding committee member of the Probate Bar Association of Ireland, and remains a member of the Association.   He is a CEDR accredited Mediator.

Mark is a member of the Council of the Hon Society of King’s Inns.

Mark is a member of the Society of Trust & Estate Practitioners (STEP), and is a member of the Medico-Legal Society of Ireland.

Re McCulloch deceased [2025] IEHC 400

Re AB deceased; CB v PP & JJ [2024] IEHC 217

PF v BH – Section 117 [2023] IECC 9

Re Healy deceased [2022] IEHC 49

Re McPartlan deceased [2020] IEHC 447

Re K deceased; K v K [2019] 2 ILRM 23

Re Hannon deceased [2018] 3 IR 402

Daly v Murphy [2017] IEHC 650

Re Earls deceased; Laaser v Earls & Anor [2016] IECA 63

Lynn v O’Hara Lynn & Anor [2015] IEHC 689

Re H deceased; S v H & Ors [2010] IEHC 70

Re Flannery deceased; Flannery v Flannery [2009] IEHC 31

Consolidated Landlord and Tenant Legislation (Clarus Press, 2007)

Legal Researcher on the following Law Reform Commission publications:

LRC 67-2002 Report Series: Title by adverse possession of land

LRC 66-2002 Report Series: The acquisition of easements and profits a prendre by prescription

LRC CP 21-2003 Consultation Paper Series: Business tenancies

LRC CP 28-2003 Consultation Paper Series: General law of landlord and tenant

LRC 70-2003 Report Series: Land law and conveyancing law: (7) positive covenants over freehold land and other proposals

LRC CP 30-2004 Consultation Paper Series: Judgment mortgages

LRC CP 34-2004 Consultation Paper Series: Reform and modernisation of land law and conveyancing law

• Probate Bar Association Annual Conference – Case Law Update – 2024
• Conradh na Gaeilge Uacht – Cad is Gá ó Thaobh an Dlí – 2024
• Law Society Non-Contentious Probate Practice – 2023
• Stephenson Probate Seminar Love & War – Trusts and Trustees – 2023
• Medico-Legal Society of Ireland Capacity to Execute a Will or Enduring Power of Attorney – 2021
• Probate Bar Association Social Welfare and Discretionary Trusts – 2021
• Midland Bar Association Practice and Procedure and Case Law Update – 2019
• Solicitors for the Elderly & Law Society of Ireland Practice and Procedure – 2019
• Society of Trust and Estate Practitioners (STEP) Annual Conference – Probate and Succession Law – 2018
• Kildare Bar Association 2016
• Irish Family Law Association Annual Conference Succession Law and the Modern Family – 2016