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Decision dueOnshore wind· CAS-02114-J9X4S6

Trecelyn Wind FarmPlans, timetable and how to have your say

A development of national significance in Wales in Caerphilly. Developments of National Significance in Wales are decided by the Welsh Ministers, not the local council, after Planning and Environment Decisions Wales has examined the application. Since 15 December 2025, new projects of this scale go through the Significant Infrastructure Projects process under the Infrastructure (Wales) Act 2024 instead, and need an infrastructure consent order from the Welsh Ministers; cases notified before then continue as Developments of National Significance.

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Where it is in the process

  1. Pre-application
  2. Submitted
  3. Pre-examination
  4. Examination
  5. Recommendation
  6. Decision due
  7. Decision made

Who decides, and how to have your say

Developments of National Significance in Wales are decided by the Welsh Ministers, not the local council, after Planning and Environment Decisions Wales has examined the application. Since 15 December 2025, new projects of this scale go through the Significant Infrastructure Projects process under the Infrastructure (Wales) Act 2024 instead, and need an infrastructure consent order from the Welsh Ministers; cases notified before then continue as Developments of National Significance.

Once the application is accepted there is a period for representations, when anyone can comment through the Welsh Government's planning casework service. The local council and community councils are consulted.

Our guide: how to have your say on a national infrastructure project.

The site

No boundary has been published yet; the dot marks the project's location.

What is proposed

Construct and operate a wind farm of up to four turbines (with a maximum blade tip height of 145m) and associated infrastructure

Other national projects nearby

Projects within 10 km. Inspectors are asked to consider the combined effect of schemes close together.

Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.