Stian Heimdal

Partner
Head of Construction
SH
Location
Oslo
Language
Norwegian, English

Stian specialises in dispute resolution and construction law, and has extensive experience providing legal assistance in large and complex building and infrastructure projects.

He has previously worked as a lawyer at AF Gruppen and Veidekke Entreprenør, which has given him valuable insight into the technical and commercial challenges that characterise the construction industry.

He advises clients in the construction and civil engineering sectors at all stages of a project – from the concept and design phase, through contract negotiations, project support and risk management, to dispute resolution and litigation.

Stian possesses in-depth knowledge of the specification systems used in Norwegian construction projects, including NS 3420 and R761/R762. He also has particular expertise in matters relating to consulting engineers’ professional liability.

He regularly gives lectures and training courses for participants in the construction and engineering industry.

Credentials
Education
Postgraduate Certificate in Law, University of Auckland
2010
Master of Law, University of Bergen
2005 – 2010
Memberships

Member of The Norwegian Bar Association

 

 

Experience
Prior experience
Partner, DLA Piper Norway
2026 –
Partner, Arntzen Grette
2025 –
Partner, Arntzen de Besche
2020 – 2025
Senior Lawyer, Arntzen de Besche
2018 – 2020
Lawyer, Veidekke Entreprenør AS
2016 – 2018
Lawyer, AF Gruppen AS
2013 – 2016
Associate / Senior Associate, Arntzen de Besche
2011 – 2013
Associate, Torkildsen & co Advokatfirma
2010 – 2011
Rankings
Chambers 2026

Construction - Band 4

"Stian is perceived as a good sparring partner, always available, attentive to details, and has truly been our person throughout the case."

"Stian has an excellent understanding of the industry and quickly grasps complex issues."

"He is particularly skilled in legal matters and strong in negotiations."

"Stian is responsive, accessible and exceptionally talented in the field."

Clients, Chambers 2026

Chambers 2023-2025

Construction – Up and Coming (ranked by Chambers since 2023)

The Legal 500, 2020-2025

Construction – Next Generation Partner (ranked by Legal 500 since 2020)

“Stian Heimdal is an incredibly talented litigator with an encyclopaedic knowledge of NS 8407 and a keen mind for legal strategy who easily manages some of the most complex cases we have.”
Client, Legal 500, 2025

“He is efficient and his advice is always excellent and well founded. His great legal skills and his extraordinary understanding of construction projects together with his warm personality, makes him a preferred lawyer within construction law"
Client, Legal 500, 2022