Arntzen Grette‘s construction practice is adept in the construction and infrastructure market, acting on the full spectrum of matters. The practice is headed by the capable trio of Line Wefald , Wenche Maartmann-Moe, and Jon Gresseth. Jan Einar Barbo joined the practice from BAHR in August 2025, with the firm benefiting from his long-standing experience across traditional projects and industrial projects. Øystein Myre Bremset acts for public sector clients across the full life cycle of projects, while Stian Heimdal is a key advisor to contractors, consultants, and developers on disputes.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Good and pleasant lawyers, easy to work with, good at including clients. Good teams that are appropriately composed in terms of expertise.’
- ‘Øystein Myre Bremset is an excellent lawyer who manages to simplify complex legal problems and find the best possible strategy to solve them.’
- The team at Arntzen Grette is knowledgeable, skillful, and offers service. Arntzen Grette is very skilled at using methods for dispute resolution in combination with applicable law in its field of use, e.g. construction law. ’
- ‘Christoffer Fjellheim has unique industry knowledge and provides advice swiftly and to the point.'
Key clients
- Veidekke Entreprenør AS AF Gruppen ASA HENT AS Consto AS NCC Norge AS NRC Group ASA GK Gruppen AS Avinor AS Norwegian Public Road Administration Nye Veier AS The Norwegian Hospital Construction Agency Central Norway Regional Health Authority South-Eastern Norway Regional Health Authority Bane NOR SF Bybanen Utbygging Vestland County Municipality Trøndelag County Municipality Rogaland County Municipality Tromsø Municipality Asker Municipality Stortinget Bjarke Ingels Group A/S OBOS Prosjekt AS Selvaag AS Norwegian Geotechnical Institute Thon Gruppen AS HRP AS Multiconsult Norge AS Contur AS OPV Consulting AS Verkis HF Omexom Elsikkerhet AS Bravida Norge AS Caverion Norge AS Leonhard Nilsen & Sønner AS Vedal AS Baneservice AS Risa AS Hywer AS Småkraft AS Forte Vannkraft AS Fornybar Norge Solid Gruppen AS J.I. Bygg AS HAB Construction AS BRG Entreprenør AS Alento AS Svevia Norge AS Kjeldaas AS Brødrene Dahl AS Nettpartner AS Moelven Industrier ASA BIR AS Roadworks AS Otera Infra AS Kraftmontasje AS Skaaret Landskap AS NLI Solutions AB Norsk Tipping AS Energi Teknikk AS LONGi Hydrogen ASA MIP Miljøkraft AS Schage Eiendom AS IF Skadeforsikring NUF Gjensidige Forsikring ASA Oceanteam ASA Klinger Westad AS Værste AS Momek Group AS Servi Group AS Algeco Norway AS CTS Nordics AS Mantena AS Aggreko Norway AS Barlindhaug Eiendom AS Salmar Finnmark AS Norwegian Fishfarming Technologies AS Nyhavna Utvikling AS Stema Rådgivning AS Arkitektene Astrup og Hellern AS JI Bygg AS Aase Prosjekt AS Solon Eiendom AS Mestergruppen Byggevare AS Rud Olsen Konsult AS
Work highlights
Representing Mantena AS in a USD 60 million dispute against Alstom related to the Norwegian ERTMS project, one of Norway’s largest and most technically complex infrastructure programmes.
Represented Innlandet County Municipality in a high-profile dispute arising from the NOK 150 million upgrade of Fv. 33 between Tonsåsen and Bjørgo – a key infrastructure project across Eastern Norway.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading Partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Line Wefald; Wenche Maartmann-Moe; Jon Gresseth
Other key lawyers
Jan Einar Barbo; Øystein Myre Bremset; Stian Heimdal; Christoffer Fjellheim