Site Of Hartwood House Witheridge Lane Knotty Green Buckinghamshire Data via plota.co.uk

PL/26/03180/CONDA - Approval of detail Reserved by Condition Approved

Proposal

Application for approval of details subject to condition 2 (materials) of planning approval Data via plota.co.uk

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View original council record ↗Last checked 24 Aug 2026, 08:56

Application progress

✓

Received

16 Apr 2026

✓

Approved

17 Jul 2026

Approved on 17 Jul 2026 · Delegated Decision · Last checked 21 Jul 2026

Documents 3

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form and Certificate · 16 Apr 2026 View ↗

Site constraints 9

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 ↗

Article 4 direction

Whole District excluding the Town of Chesham - Poultry production.. Named permitted development rights are withdrawn here.

An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.

Ancient woodland about 8 m away: Penbury Grove

Inside the 15 m buffer standing advice asks for from the boundary.

National policy refuses development that would cause loss or deterioration of ancient woodland or ancient trees unless there are wholly exceptional reasons.

Habitat network: Restorable Habitat

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

National landscape about 8 m away: Chilterns

Outside the landscape; its setting can still be raised.

Previously an area of outstanding natural beauty, which is still the designation in law. Since 2023 authorities must seek to further its purpose, not merely have regard to it.

Also on the record

Radon affected area, class 2; Inside the Beaconsfield built-up area; Priority habitat about 47 m away: Deciduous woodland; 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 6 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 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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Important details

Council: Buckinghamshire
Application type: Approval of detail Reserved by Condition
Postcode: HP9 2TX
Received: 16 Apr 2026
Validated: 16 Apr 2026
Ward: Former Penn Wood & Old Amersham
Parish: Penn
Case officer: Show
Target decision: 11 Jun 2026
Decision: Condition Accepted
Decision date: 17 Jul 2026
Decision level: Delegated Decision
Applicant: Show
Agent: DP Architects

Consultation & key dates

Statutory expiry: 11 Jun 2026
Env. assessment: No

Buckinghamshire

Planning Authority Score

1.3/10

Poor

#284 of 296 councils

Relevant to this application:

Major dwellings

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