Guide

Marine Licence

Activities in the marine environment (below Mean High Water Springs) require a Marine Licence from the Marine Management Organisation (MMO) in England.

Manufacturing & EngineeringEnergy & Utilities UK-wide

When you need a marine licence

A marine licence is required for:

  • Construction, alteration or improvement of works in the sea
  • Deposit of substances or articles (including cables)
  • Removal of substances or articles from the seabed
  • Dredging and disposal of dredged material

Offshore wind applications

For DCO projects, the marine licence is typically deemed within the Development Consent Order. Separate applications may be needed for non-DCO activities.

  1. Check DCO deemed consent

    Determine if marine activities fall within DCO deemed consent

  2. Apply to MMO

    For non-DCO activities, apply to MMO via Marine Case Management System

  3. Provide EIA information

    Provide Environmental Impact Assessment information

  4. Pay application fee

    Pay application fee based on activity type and scale

  5. Allow determination time

    Allow 3-12 months for determination depending on complexity

Apply for a marine licence

Develop offshore wind projects and secure seabed leases

How to develop offshore wind projects in UK waters, from securing seabed rights through Crown Estate leasing rounds to obtaining Section 36 consent, safety zones, and grid connections. Covers England, Wales, Scotland, and Northern Ireland with differences in consenting regimes and landlords.

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Development Consent Order (DCO)

Offshore wind farms exceeding 100MW and other Nationally Significant Infrastructure Projects (NSIPs) require a Development Consent Order from the Secretary of State.

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Offshore Wind Development Consent Orders (DCO)

Offshore wind projects over 100MW in English territorial waters require a Development Consent Order from the Secretary of State. Understand the specific thresholds, fees, timelines and 7-stage process for offshore wind NSIPs.

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Crown Estate Offshore Wind Seabed Leasing

Securing seabed rights is the critical first step for offshore wind projects in UK waters. The Crown Estate and Crown Estate Scotland manage competitive leasing rounds with option fees, operational rent, and up to 60-year lease terms.

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