Coronach Old Mill Road Denham Buckinghamshire UB9 5AW Data via plota.co.uk

Decided PL/23/1115/FA

Appeal: Dismissed · 25 Mar 2026 · Written Representations · Inspectorate case 6001655 ↗

Council

Buckinghamshire 1.3/10

Date received

around 14 Apr 2023

Date validated

14 Apr 2023

Postcode

UB9 5AW

Description

Single storey rear infill extension Data via plota.co.uk

Get alerts nearby Council site ↗

Last checked 14 Oct 2026, 07:03

Site constraints 6

Green belt: London

Inappropriate development needs very special circumstances.

Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.

Read the government guidance ↗

Local nature reserve about 302 m away: Denham Quarry Park (Mapped Boundary Not Verified)

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.

Also on the record

Radon affected area, class 2; National infrastructure project about 659 m away: Expansion of Heathrow Airport (Third Runway), at pre-application; Inside the Denham built-up area; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.

Not affected

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

Checked on 14 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, 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.

Sales history 1

Last sold for £950,000 in November 2022. Detached house, freehold.

30 November 2022£950,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

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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