Andrei is a dual qualified Building & Construction Lawyer whose practice focuses on the resolution of complex commercial and residential building disputes.
Andrei Jerdetski

Andrei Jerdetski is a key member of our Building & Construction Law Team. He holds qualifications in both Law and Construction Management and is a licenced builder in New South Wales.

Andrei’s practice focuses on assisting developers and subcontractors to recover progress payments and resolve disputes under the Building and Construction Industry Security of Payment Act 1999 (NSW), as well as advising and representing builders and homeowners in relation to disputes under the Home Building Act 1989 (NSW)

Andrei has diligent and determined approach to the law which, coupled with his deep understanding of the technical aspects of construction, serve his clients well.

About Andrei

Before coming to the law Andrei worked for 15 years in various pre-construction roles, including in cost planning and contract management. His responsibilities included feasibility proposals, contract reviews, cost plans, tendering, value engineering, and design and construct proposals.

Andrei’s experience in the construction industry provides him with invaluable insights that enable him to navigate complex issues relating to construction contracts, contract administration, regulatory environments, technical defects, delays and more.

Being a licenced builder Andrei has extensive technical knowledge of the Australian Standards and the Building Code of Australia. His years as a cost planner and estimator also enable hi rare ability to critically review Expert Reports and Scott Schedules both as regards alleged defects and rectification costs.

Andrei is particularly adept at assisting clients in relation to the Building and Construction Industry Security of Payment Act 1999 (NSW) having operated a consultancy business assisting head contractors and subcontractors to make and respond Payment Claims and Adjudication Applications whilst completing his law degree.

Their commitment to providing a valued service left me assured, that if my Contract dispute, did get to the lawyers, I certainly be in touch with Andrei and Mary.

I submitted a query to Roberts Crosbie Mortensen via their Free Case Evaluation service. I was doubtful I’d get anything from a Free service other than bad new and a plug for how they would save me. Well, that did not happen, and I had a productive discussion with Andrei and follow-up with Mary leaving me assured I was heading in the right direction. Fortunately (for me) the dispute ended cleanly. I’d highly recommend these guys.


Andrei and Mary were very helpful, professional and a pleasure to deal with.

Would recommend. Thanks again

Alex Nicholls

Who Andrei Works With

Andrei assists developers, builders, subcontractors and homeowners to make and administer building contracts, recover progress payments and resolve disputes both under the Building and Construction Industry Security of Payment Act 1999 (NSW) and the Home Building Act 1989 (NSW).

He acts in relation to Adjudication Applications as well as claims in the Supreme Court, District Court and NSW Civil & Administrative Tribunal.


With qualifications and experience in both legal and construction, Andrei brings his clients a rare and valuable advantage.

His ability to seamlessly blend his legal knowledge and building expertise allows him to conceive and implement innovative and practical solutions in relation to a wide range of building related challenges.

Security of Payment Guide

Get Paid. When it matters most. The essential tool for every business owner in the building and construction industry.

A Home Builder’s Guide to Resolving Disputes in NCAT

An essential Guide to help Home Builders develop a robust defence and achieve a more favourable outcome in an NCAT dispute. Don’t get caught out; get the right advice and get it fast.

Home Building Act Guide

An introduction to contractor licensing, statutory warranties, mandatory contracting requirements and insurance under the Home Building Act 1989 (NSW).


  • Bachelor of Building: Construction Management (Western Sydney University)
  • NSW Builder’s Licence
  • Bachelor of Laws (Western Sydney University)
  • Graduate Diploma of Legal Practice (the College of Law)
  • Lawyer of the Supreme Court of NSW


  • Academic (Bachelor of Law – Dean’s Merit List 2020)



Andrei has a diverse set of hobbies outside of work, including his passion for cross-country running and his avid interest in cars.

Meet Our Team

Our Specialist Lawyers include
3 Accredited Specialists in Commercial Litigation, 1 Accredited Specialist in Business Law and an Accredited Adjudicator under Security of Payment Laws.

We are a leading specialist business and litigation law firm delivering accessible big firm expertise with a personal client experience that is first class.

Our People
Law Society Accredited Specialists
99 %
More Accredited Specialists in Commercial Litigation than 99% of all law firms in NSW