21 Hawthorn Drive New Denham Buckinghamshire UB9 4AJ Data via plota.co.uk

PL/26/06347/FA - Full Application Awaiting decision

Proposal

Double storey rear extension with dormers Data via plota.co.uk

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View original council record ↗Last checked 7 Oct 2026, 20:25

Street View

Application progress

✓

Received

17 Aug 2026

✓

Consultation

18 Aug 2026

Decision

Expected by 12 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 12 Oct 2026, from Buckinghamshire's recent extensions.

The consultation period closed on 1 Oct 2026.

Documents 4

Statements & assessments 3

PDF SUDS STATEMENT Additional Information · 17 Aug 2026 View ↗ PDF FIRE SAFETY STATEMENT Additional Information · 6 Aug 2026 View ↗ PDF FLOOD RISK ASSESSMENT 21 HAWTHORN DRIVE Additional Information · 6 Aug 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form and Certificate · 6 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 7

Conservation area 9 m away: Uxbridge Lock

The edge of the area; work outside it can still affect its setting.

The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.

Also on the record

4 listed buildings within 150 m; Radon affected area, class 2; Flood defence 10 m away (embankment, designed for a 1 in 100 year flood); National infrastructure project 290 m away: Expansion of Heathrow Airport (Third Runway), at pre-application; Inside the New Denham built-up area; Green belt 79 m away: London.

Not affected

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

Checked on 6 October 2026. 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 £628,000 in February 2023. Detached house, freehold.

28 February 2023£628,000

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

Building

Floor area87 m² (936 sq ft)

Energy ratingE (48 out of 100), could reach C

PropertyDetached bungalow, 5 habitable rooms

Built1930 to 1949

HeatingBoiler and radiators, mains gas

WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in July 2021, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council: Buckinghamshire
Application type: Full Application
Postcode: UB9 4AJ
Received: 17 Aug 2026
Validated: 17 Aug 2026
Ward: Gerrards Cross and Denham
Parish: Denham Parish Council
Case officer: Show
Target decision: 12 Oct 2026
Decision level: Delegated Decision
Applicant: Show
Agent: ACE PLAN Ltd

Decision outlook

Day 53 of the 56-day target. Buckinghamshire usually decides extensions by day 56.

prediction

Day 533 days to the 56-day target

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

1comment received

1 objecting

2 neighbours consulted · Last counted 7 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Neighbours: 18 Aug 2026
Consultation: 18 Aug 2026
Comments by: 1 Oct 2026
Site or press notice: 21 Aug 2026
Statutory expiry: 12 Oct 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

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.