Oakley Barn Thorndon Cross EX20 4NQ Data via plota.co.uk

2831/26/CLP - Certificate of Lawfulness for Proposed Use Under Consideration

Proposal

Certificate of lawfulness for proposed single-storey side extension to create enlarged ground floor bedroom, and works to improve thermal insulation and robustness of existing glazed entrance hallway by reducing extent of glazing in external walls. Data via plota.co.uk

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View original council record ↗Last checked 27 Oct 2026, 02:11

Application progress

✓

Received

9 Oct 2026

✓

Validated

14 Oct 2026

Decision

Expected by 9 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 2 Dec 2026, from West Devon's recent extensions.

Documents 4

Site constraints 3

Agricultural land, grade 5

Very poor quality farmland, not best and most versatile. Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. Natural England's Provisional ALC map (1:250,000, 1970s), which most planning maps still show, had this area as grade 4. The predicted grade is Defra's current estimate; only a site survey settles it.

Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.

Habitat network: Network Expansion Zone

Where habitat is joined up enough to work as a network. Context, not a constraint on its own.

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 · Not green belt · No scheduled monument at the site

Checked on 16 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.