Full Name: Ms Diana H Costaras
Phone: +61 3 9225 7777
Mobile: 0416 046 397
Chambers: Owen Dixon Chambers West
Room: Level 1
Date of Admission: 16 Dec 2009
Called to the Bar: 30 Apr 2015
Qualifications: BA (Hons) / LLB (Hons) Monash
Previous Occupation: Solicitor, Lander & Rogers, Associate, Supreme Court of Victoria


Diana maintains a broad practise in common law, insurance law and commercial law. Since joining the bar, Diana has appeared alone and as junior counsel in proceedings in the Supreme Court, Coroners Court, County Court and Magistrates’ Court. 

Diana practised in insurance litigation at Lander & Rogers for four years where she was involved in professional indemnity litigation, medical defence work, inquests into deaths in hospitals and disciplinary proceedings. Diana also worked on property and industrial special risks claims and recovery actions on behalf of the Victorian WorkCover Authority. She had a broad range of clients, from insurers and engineers to nurses, surgeons and psychologists.

Prior to coming to the Bar, Diana was senior associate to the Honourable Justice Dixon in the Supreme Court of Victoria, where she assisted in the Black Saturday bushfire proceedings, civil appeals and common law and major torts claims. She also worked with the Honourable Justices Osborn and J Forrest.

Diana was named Most Outstanding Advocate in the final of the LIV & Hanover Welfare Services Mooting Competition by the Honourable Justices Weinberg, Neave and Redlich. She graduated with Honours in Law and Honours in Arts, in which she majored in German.

Diana read with Daniel Aghion and her senior mentor was the Honourable Justice Forbes.

Other Languages Spoken

  • German

Areas of Practice

Commercial Law

  • Contractual Disputes
  • Insurance Law & Professional Negligence Law

Common Law

  • Motor Vehicles & Transport
  • Negligence
  • Workers Compensation

Industrial Relations Law & Employment Law

Inquests, Inquiries, Tribunals & Commissions

  • Coronial Inquests
  • Royal Commissions

Public Law & Administrative Law

  • Disciplinary Proceedings
From 15 May 2015, liability limited by a scheme approved under Professional Standards Legislation.

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