Merthyr Tudful
Steel buildings in Merthyr Tydfil
Merthyr sits at the top of the Taff valley where the valleys meet the Beacons, and the north of the borough is inside the National Park. Farming here is hill grazing on high, wet, exposed ground, and the business side is units and storage in and around the town. The whole valley is old coalfield and ironworks country, so ground and mining history come first. Merthyr’s council is also the SAB for Blaenau Gwent, so it knows farm drainage applications well.
Buildings designed, supplied and erected by South West Steel Buildings across Merthyr Tydfil, including Merthyr Tydfil, Aberfan, Troedyrhiw, Treharris and Dowlais.
- Planning authority
- Council and Park
- Merthyr Tydfil County Borough Council, or the Bannau Brycheiniog National Park Authority inside the Park.
- Protected landscape
- Yes, in part
- Bannau Brycheiniog National Park
- On the coalfield
- Mostly
- Check the site on the mining map.
- Drainage approval
- The council
- Needed at 100 m² or more.
What to check first in Merthyr Tydfil
Merthyr has three things to settle early: whether the site is inside the National Park to the north, what the mining map says, and how exposed the site is at that height. The council here also runs drainage approval for Blaenau Gwent, so its SAB team sees plenty of upland farm applications — a pre-application conversation is worth having.
Planning in Merthyr Tydfil
Most of Merthyr Tydfil comes under Merthyr Tydfil County Borough Council. The part inside Bannau Brycheiniog National Park — the north of the borough, up towards the Beacons — comes under the Bannau Brycheiniog National Park Authority instead, which is the planning authority there and looks closely at the siting and appearance of any new building.
The rules themselves are Welsh, not English — 465 m² on 5 hectares or more, a 28-day notice, no Class Q — and are set out in our planning guide for farm buildings in Wales.
Garden buildings. Merthyr Tydfil includes protected land — Bannau Brycheiniog National Park. There, a garage or workshop at a house more than 20 m from it is limited to 10 m² under permitted development, and nothing may go beside the house. See garages and workshops.
The ground, and the coal
Merthyr Tydfil: Most of it sits on the South Wales coalfield, so old shallow workings and mine entries are a real foundation question — check the site on the mining authority’s map before anything is designed.
In the Mining Remediation Authority's Development High Risk Area, most planning applications need a Coal Mining Risk Assessment, and the pads may need a ground investigation first. The authority's guidance explains how to check a site.
The groundworks calculator works out the base for your own slope.
Drainage approval in Merthyr Tydfil
At 100 m² or more, drainage needs SuDS Approval Body approval first — for Merthyr Tydfil, Merthyr Tydfil County Borough Council. Roofing an existing yard? See the £40/m² yard roofing grant.
Buildings we put up in Merthyr Tydfil
Questions about building in Merthyr Tydfil
Who decides planning for a farm building in Merthyr Tydfil?
Merthyr Tydfil County Borough Council for most of Merthyr Tydfil; the Bannau Brycheiniog National Park Authority for land inside Bannau Brycheiniog National Park, which covers the north of the borough, up towards the Beacons.
Is Merthyr Tydfil on the coalfield?
Most of it sits on the South Wales coalfield, so old shallow workings and mine entries are a real foundation question — check the site on the mining authority’s map before anything is designed.
Who approves drainage for a new building in Merthyr Tydfil?
Merthyr Tydfil County Borough Council, as the SuDS Approval Body for Merthyr Tydfil, for anything covering 100 square metres or more.
Do you build in Merthyr Tydfil?
Yes. South West Steel Buildings design, supply and erect buildings across Merthyr Tydfil, including Merthyr Tydfil, Aberfan, Troedyrhiw, Treharris and Dowlais.
Tell us what you want to put up in Merthyr Tydfil
Rough span and length is enough. We reply the same day, wherever you are in Merthyr Tydfil.