Contract signed with the City of Oslo for the construction of a new water treatment plant
Reference is made to the stock exchange announcement published on 19.10.2022 stating that AF Gruppen was appointed by the City of Oslo for a partnering contract for the construction of a new water treatment plant at Huseby in Oslo, as part of the New Water Supply project. The collaboration has now moved from development, planning, and design to phase 2, which is detailed design and construction. The contract is a collaborative contract in an alliance between the City of Oslo, represented by the Water and Sewage department, the designers Multiconsult and AF Gruppen. The main works are carried out inside the mountain facility at Huseby.

The works for AF Gruppen include groundwork and concrete work, process plant, dosing and sludge plant, and electrical work. The works are underway and are to be completed in the 4th quarter of 2027. The agreement has a value of approximately NOK 7,600 million excluding VAT.
“AF Gruppen is very pleased to have been awarded the contract to build a new water treatment plant for the City of Oslo. We look forward to continuing good cooperation with the City of Oslo and carrying out the construction so that the residents of Oslo have a safe and secure water supply in the future,” says Amund Tøftum, CEO of AF Gruppen.
About the Project
The City of Oslo has only one main water source. This makes the capital’s water supply very vulnerable. The City of Oslo is therefore building a new water supply from Holsfjorden in Lier Municipality and a water treatment plant and a new main pipeline network in Oslo. When the facility is completed, Oslo will have a fully functional and robust backup water supply.
Contacts
Geir Flåta
Tel:47 994 01 510geir.flata@afgruppen.noKnut Ekern
Tel:+47 930 02 600knut.ekern@afgruppen.noImages

AF Gruppen
AF Gruppen is a leading contracting and industrial group that was formed by an entrepreneurial spirit and execution capabilities. The group has 6,000 employees and revenue reached NOK 30,5 billion in 2023. AF Gruppen is listed on Oslo Stock Exchange (AFG).
We provide a broad range of services with seven operational business areas: Civil Engineering, Building, Betonmast, Property, Energy and Environment, Sweden and Offshore.
Subscribe to releases from AF Gruppen ASA
Subscribe to all the latest releases from AF Gruppen ASA by registering your e-mail address below. You can unsubscribe at any time.
Latest releases from AF Gruppen ASA
Contract Awarded by the Swedish Fortifications Agency6.10.2025 11:08:04 CEST | Press release
HMB Construction, part of AF Gruppen, has been commissioned by the Swedish Fortifications Agency to carry out a construction project at Ärna F16 in Uppsala. The contract value is approximately SEK 112 million, excluding VAT.
End-to-end decommissioning contract30.9.2025 09:18:03 CEST | Press release
AF Gruppen has, through its subsidiary AF Offshore Decom and in a joint venture (JV) with THREE60 Energy, been awarded a contract with bp to provide integrated decommissioning services for their Andrew field in the North Sea
Rehabilitating the Norwegian School of Sport Sciences30.9.2025 08:40:38 CEST | Press release
AF Gruppen has been awarded a collaborative contract by Statsbygg for the maintenance and rehabilitation of the Norwegian School of Sport Sciences at Sognsvann in Oslo. The project includes approximately 16,000 square meters of existing building stock, comprising sports facilities, teaching spaces and office areas, along with associated technical installations.
Awarded new contract by Hafslund Celsio29.9.2025 14:08:32 CEST | Press release
AF Gruppen has been selected as the contractor for the construction of a new technical building and foundations for the carbon capture facility to be built at Hafslund Celsio’s waste incineration plant at Klemetsrud in Oslo. This will be one of the world’s first carbon capture facilities for waste incineration, and the project is part of the Norwegian government’s Longship initiative.
Entering Collaborative Contract for the Development of Fornebu Sør29.9.2025 08:41:38 CEST | Press release
AF Gruppen has been awarded a collaborative contract by OBOS Fornebu AS for the development of the new urban area Fornebu Sør in Bærum.
In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.
Visit our pressroom