Nuclear project owner and harbour authority operator

Sizewell C Limited

Aerial view of the Sizewell C Main Construction Area under active civil construction beside the Suffolk coast

Sizewell C Limited, Main Construction Area photographed 10 June 2026

Sizewell C Limited is the developer, construction client and future owner-operator of the 3.2 GW Sizewell C station.

Directory record: maintained by organization type, active region, marine works role, and market relevance.

Directory focus

Nuclear project owner and harbour authority operator with 3 active regions

Use this profile to map likely counterparties, delivery responsibilities, and where nuclear project owner and harbour authority operator capacity may influence project access or competition.

Profile status Public Evidence reviewed 20 July 2026

Type

Nuclear project owner and harbour authority operator

Active regions

Europe, United Kingdom, Suffolk coast

Marine works roles

Nuclear project developer and construction owner, Temporary desalination and construction-water client, Marine intake, outfall and shore-crossing procuring entity, Statutory harbour authority legal operator, Civil Works Alliance client participant, Owner testing, environmental compliance and handover counterparty

Profile summary

Sizewell C Limited is the developer, construction client and future owner-operator of the 3.2 GW Sizewell C station. During construction it is also the client for temporary water supply, including the desalination plant, seawater intake and return line, and the treated-wastewater combined drainage outfall. The project company established the statutory harbour authority required by the development consent order; the Harbour Master separately controls navigation safety and marine-work permissions.

Related records 1

Directory profile status

This public profile is a maintained directory record, not an endorsement, ranking, procurement recommendation, partnership confirmation, or claim of current availability. The evidence-review date records when IMWO checked the profile's public sources; it is not an organization event date. Use the profile for market mapping and research, then carry out separate technical, legal, and commercial diligence.

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Source basis

Sizewell C Limited identifies itself as the company that will develop, construct, own, operate, maintain and decommission the station. The UK Government's final investment decision record establishes the current project and shareholder framework. Sizewell C's water page assigns the temporary desalination supply to the construction programme, while the Harbour Authority site records the company's legal duty to establish and operate the statutory harbour authority. The Harbour Master retains the separate navigation-safety and marine-permission function. The Civil Works Alliance covers broad marine and tunnelling delivery, but the reviewed public record does not allocate the three temporary utility lines to an individual alliance member or publish complete head installation, testing, first water or owner acceptance.

Sources used 7