Cardiff Tidal Lagoon will be an offshore generating station with more than 100MW of installed capacity and, as such, is considered a ‘nationally significant infrastructure project’ (NSIP) under the Planning Act 2008.

NSIPs are consented under a different system to that managed by local authorities, being managed instead by the UK’s Planning Inspectorate and consented by the relevant Secretary of State. The Project lies in Welsh waters, meaning a Marine Licence (for dredging and construction) is also required under the Marine & Coastal Access Act 2009. Marine Licence applications are determined by the Marine Licensing Team of Natural Resources Wales (NRW) on behalf of the Welsh Government. The Project cannot go ahead without both consents.

We will consult in depth with regulators, stakeholders and the local community while conducting a detailed environmental impact assessment.  To ensure you get to have your say, look out for announcements in the local press, on this website, and/or sign-up for updates via

We expect to submit a planning application for the DCO and Marine Licence once we have considered all comments from consultees. These applications will run in parallel, in a similar manner to our applications for Swansea Bay Tidal Lagoon. Development Consent Orders are usually determined within 18 months of application. The Planning Inspectorate’s website provides excellent advice on the NSIP planning process and how you can participate, as well as hosting current information specifically relating to the Cardiff Tidal Lagoon.


Proposed design & position of Tidal Lagoon Cardiff:

Tidal Lagoon Plc


T: +44 (0)1452 303892

A: Pillar & Lucy House
Merchants Road
The Docks

Tidal Lagoon (Swansea Bay) Plc


T: +44 (0)1792 274006

A: 8th Floor
One Central Square
CF10 1FS

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