152 Sheerstock Haddenham Buckinghamshire HP17 8EX Data via plota.co.uk

PL/26/04234/SA - Certificate of Lawful Use - Proposed Approved

Proposal

Certificate of lawfulness for the proposed single storey rear extension Data via plota.co.uk

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View original council record ↗Last checked 24 Aug 2026, 08:58

Street View

Application progress

✓

Received

22 May 2026

✓

Approved

13 Jul 2026

Approved on 13 Jul 2026 · Delegated Decision · Last checked 3 Aug 2026

Documents 3

Decision & officer reports 2

PDF CASE OFFICER REPORT DELEGATED Case Officer Report · 13 Jul 2026 View ↗ PDF DECISION Decision Notice · 13 Jul 2026 View ↗

Site constraints 4

Radon affected area, class 6

An estimated 30% or more 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 ↗

Also on the record

Inside the Haddenham (Buckinghamshire) built-up area; Conservation area 99 m away: Haddenham; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 2, but it predates the buildings here and the current map does not class it as farmland.

Not affected

Outside flood zones 2 and 3 · Not green belt · No listed building 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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Other new applications on this street

21 Jul 2026Approved

Horseshoe House 114 Sheerstock Haddenham Buckinghamshire HP17 8EX

Single storey rear extension with associated internal alterations.

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15 Sept 2026Decided

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Important details

Council: Buckinghamshire
Application type: Certificate of Lawful Use - Proposed
Postcode: HP17 8EX
Received: 22 May 2026
Validated: 22 May 2026
Ward: Haddenham and Stone
Parish: Haddenham
Case officer: Show
Target decision: 17 Jul 2026
Decision: Cert of Law PROPOSED-granted
Decision date: 13 Jul 2026
Decision level: Delegated Decision
Applicant: Show
Agent: McAndrew Associates Ltd

How this decision compares

Decided in 52 days from validation, 4 days faster than Buckinghamshire's median of 56 for extensions. Approved, as 82% of extensions here are.

This one52d

Council56d

UK55d

54%decided within 8 weeks

82%approved

2,226decided in the last year

Plota live figures for extensions decided by Buckinghamshire in the last twelve months, from validation. Buckinghamshire decision record →

Public comments

No public comments yet.

Last counted 3 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Statutory expiry: 17 Jul 2026
Env. assessment: No

Buckinghamshire

Planning Authority Score

1.3/10

Poor

#284 of 296 councils

Relevant to this application:

Householder decisions

Buckinghamshire is one of the slowest councils in England for householder decisions, ranking #280 out of 296. 55% of applications have the time limit extended, above the 41% national average. Householder applications are slightly less likely to be approved here (86%) than the national average (90%).

Among the slowest councils in England

for householder decisions

These figures are council-wide context, not a prediction for this application. View full council performance

Buckinghamshire decision statistics

Based on MHCLG data, the year to March 2026

84%

Overall approval rate

Below avg (87%) #217 of 296

86%

Householder approved

Below avg (90%) #241 of 296

34%

Decided in 8 weeks

Below avg (63%) #280 of 296

55%

Extended time limit

Above avg (41%) #248 of 296

76%

Minor dwellings approved

491 decided (1-9 homes)

82%

Major dwellings approved

71 decided (10+ homes)

82%

Change of use approved

131 decided

4,446

Total decisions

690 refused in the year to March 2026