4 Ash Grove Trefechan Merthyr Tydfil CF48 2EG Data via plota.co.uk

P/26/0145 - Full Approved

Proposal

Single storey rear extension Data via plota.co.uk

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View original council record ↗Last checked 26 Aug 2026, 21:52

Street View

Application progress

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Received

30 Jun 2026

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Consultation

3 Jul 2026

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Approved

21 Aug 2026

Approved on 21 Aug 2026 · Delegated Decision · Last checked 26 Aug 2026

Documents

View the documents on the council's website ↗

Site constraints 3

Local nature reserve 74 m away: Cwm Taf Fechan Woodlands

Work nearby can need a habitats assessment.

Harm to a protected site is only accepted where there is no alternative and an overriding public interest.

SSSI 74 m away: Cwm Taf Fechan Woodlands

Natural England may need consulting, depending on what is proposed.

Sites of special scientific interest are the best wildlife and geological sites in the country. Development likely to harm one is rarely permitted.

Radon affected area, class 5

An estimated 10 to 30% of homes reach the radon action level. Indicative for the 1 km square, which takes the highest class found in it; a radon test gives the answer for a building.

From the British Geological Survey and UK Health Security Agency indicative atlas. Under building regulations, as the BRE guide BR 211 (2023) sets out, new buildings and extensions need basic radon protection from class 3 in England and Wales and from class 2 in Scotland, and full protection from class 5. The class at the site itself, from the detailed BGS map, decides which.

UKHSA radon ↗

Not affected

Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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