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Carmarthenshire Planning Applications: A 2026 Guide for West Wales

Bhavesh Ramburn

Carmarthenshire planning applications: which authority handles yours?

If you are searching for a planning application in Carmarthen (Caerfyrddin), Llanelli, Ammanford, Burry Port, Kidwelly, Llandovery, Llandeilo, Newcastle Emlyn, or any of the villages and rural areas of Carmarthenshire, the responsible Local Planning Authority (LPA) is Carmarthenshire County Council (formally Cyngor Sir Caerfyrddin). The county is one of the principal areas of Wales, with LPA functions discharged by the County Council.

Carmarthenshire operates its own planning service, separate from the Welsh Government and from the Pembrokeshire Coast National Park Authority (which is the LPA for part of the adjacent Pembrokeshire Coast National Park).

How the Welsh planning system applies in Carmarthenshire

Carmarthenshire is in Wales, where planning is a devolved matter. The statutory framework is set out in:

  • The Town and Country Planning Act 1990 — which applies to England and Wales but is implemented separately in Wales.
  • The Planning (Wales) Act 2015 — the principal Welsh-specific planning statute.
  • The Town and Country Planning (General Permitted Development) (Wales) Order 2012 (as amended) — the Welsh equivalent of the English GPDO 2015, with different class numbers and limits.
  • Future Wales: The National Plan 2040 — the Welsh national planning framework, published by the Welsh Government in February 2021.
  • The Carmarthenshire Local Development Plan (LDP) 2018–2033 — the local plan for the Carmarthenshire LPA area, adopted in December 2018.

The Welsh Government Planning Division is responsible for national planning policy in Wales. The Planning and Environment Decisions Wales (PEDW) handles appeals and called-in applications in Wales.

For the broader PD framework, see our guide on Permitted Development Rights in 2026 — note that the English and Welsh PD regimes differ in important ways.

How to view or comment on a current Carmarthenshire planning application

Public access to the live application register is a statutory right under the Town and Country Planning Act 1990 (as applied in Wales) and the Planning (Wales) Act 2015. Carmarthenshire operates a public-access planning register that lists all live and decided cases. The register is accessible via the Welsh Government planning register or the Carmarthenshire County Council planning service page.

You can also use the Planning Portal for national searches. Members of the public have at least 21 days from the date an application is advertised (site notice and/or neighbour letter) to submit written comments. Comments must relate to material planning considerations — impact on amenity, design, traffic, ecology, residential amenity, heritage, or compliance with the local development plan. Comments that are vexatious or relate solely to private disputes (boundary walls, party walls, loss of a view) cannot be taken into account.

Application fees and statutory timelines

Application fees in Wales are set centrally by the Welsh Government under the Town and Country Planning (Fees) (Wales) Regulations 2015, as amended. The Welsh fees are broadly similar to (but not identical to) the English fees. Indicative fees for the most common Carmarthenshire application types in 2026:

  • Householder application (extensions and alterations to an existing dwelling): £230.
  • Full planning permission for a new dwelling: £460 plus £140 for each additional dwelling.
  • Change of use: varies by class, typically £460 or higher.
  • Prior notification / prior approval (where applicable under the Welsh GPDO): £100.
  • Listed Building Consent (where the property is statutorily listed): £250.

The statutory determination period is 8 weeks for householder and most local applications under the Town and Country Planning Act 1990, and 13 weeks for major developments. Carmarthenshire generally meets these targets but can extend via a further-information request that pauses the clock.

For an appeal against a refusal or conditions, the appeal is made to Planning and Environment Decisions Wales (PEDW) rather than the English Planning Inspectorate. For a walkthrough of the English process, see our UK planning appeals guide.

Conservation areas in Carmarthenshire

Carmarthenshire has a substantial stock of historic towns and conservation areas, reflecting its long history as a market and maritime county. Designated Conservation Areas include:

  • Carmarthen town centre — the historic county town on the River Tywi, including the ruined Norman castle and the old town layout.
  • Llanelli — a town with a Conservation Area covering parts of the older town centre.
  • Llandeilo — a historic market town in the Tywi Valley, with a Conservation Area covering the town centre and bridge.
  • Llandovery — a historic market town at the northern edge of the county, with a Conservation Area.
  • Kidwelly — a historic walled town with a Conservation Area centred on the Norman castle and medieval town layout.
  • Laugharne — a town associated with the poet Dylan Thomas, with a Conservation Area.
  • Myddfai — a historic village in the Brecon Beacons foothills.

The Brecon Beacons National Park (now renamed Bannau Brycheiniog National Park) extends into the northern part of the county. Properties within the National Park boundary are decided by the Brecon Beacons National Park Authority, not Carmarthenshire County Council. The Pembrokeshire Coast National Park does not extend into Carmarthenshire.

Within a Conservation Area:

  • Six weeks’ notice is required before any work to a tree.
  • Permitted Development rights are restricted for external alterations, cladding, and demolition.
  • Listed Building Consent is required separately for any alteration affecting the character of a listed building.

For the underlying householder-application context — which is the most common Carmarthenshire application type — see our guide on householder planning permission for a garden office. For a worked example of how a reorganisation case can affect an LPA, see our Allerdale planning guide. For the broader UK LPA portal landscape, see our Bradford planning portal guide.

Next steps and resources

Editorial note. This article is for guidance only and does not constitute regulated advice. Carmarthenshire is in Wales, where planning is a devolved matter and the Welsh GPDO, fee regulations, and national policy framework differ from the English equivalents. For project-specific questions, consult a chartered planning professional registered with the Royal Town Planning Institute (RTPI).