9 Carton Grove Wellingborough NN8 1FA Data via plota.co.uk

26/02298/LDP - Lawful Development - Proposed Approved

Proposal

Proposed loft conversion, rear dormer extension, three velux rooflights in front elevation, side first floor window to bathroom and associated internal and external works Data via plota.co.uk

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View original council record ↗Last checked 8 Oct 2026, 02:26

Street View

Application progress

✓

Received

14 Aug 2026

✓

Approved

3 Sept 2026

Approved on 3 Sept 2026 · Officer Delegated Decision · Last checked 5 Sept 2026

Documents 6

Decision & officer reports 2

PDF Lawful certificate - proposed Decision · 3 Sept 2026 View ↗ PDF Report - delegated Decision · 3 Sept 2026 View ↗

Application forms 1

PDF Applicationformredacted Application Form · 14 Aug 2026 View ↗

Site constraints 7

Flood zone 2, rivers and sea

Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.

The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.

Flood map ↗

Habitat network: Network Enhancement Zone 1

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 ↗

Also on the record

Nature improvement area: Nene Valley; Special protection area 394 m away: Upper Nene Valley Gravel Pits; SSSI 395 m away: Upper Nene Valley Gravel Pits SSSI; Inside the Wellingborough built-up area.

Not affected

Not green belt · No listed building at the site · No scheduled monument 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.

Building

Floor area68 m² (732 sq ft)

Energy ratingB (83 out of 100), could reach A

PropertySemi-detached house

Built2014

HeatingBoiler and radiators, mains gas

WallsAverage thermal transmittance 0.20 W/m²K

From the energy performance certificate lodged in December 2015, the latest held for this property. The building may have changed since. View the certificate

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26/02139/LDP

Important details

Council: North Northamptonshire
Application type: Lawful Development - Proposed
Postcode: NN8 1FA
Received: 14 Aug 2026
Validated: 14 Aug 2026
Ward: Victoria
Parish: Wellingborough CP
Case officer: Show
Target decision: 9 Oct 2026
Decision: Application Permitted/Approved
Decision date: 3 Sept 2026
Decision level: Officer Delegated Decision
Applicant: Show
Agent: Kingsmead Conversions

How this decision compares

Decided in 20 days from validation, 43 days faster than North Northamptonshire's median of 63 for extensions. Approved, as 87% of extensions here are.

This one20d

Council63d

UK55d

45%decided within 8 weeks

87%approved

544decided in the last year

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

Public comments

No public comments yet.

Last counted 5 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15158712
Planning Portal ref: PP-15158712
Statutory expiry: 9 Oct 2026
Env. assessment: No

North Northamptonshire

Planning Authority Score

1.3/10

Poor

#285 of 296 councils

Relevant to this application:

Householder decisions

North Northamptonshire is one of the slowest councils in England for householder decisions, ranking #279 out of 296. The council extends the time limit on 64% of applications - one of the highest rates in England. Expect your application to take longer than the standard deadline. Householder applications are slightly less likely to be approved here (88%) 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

North Northamptonshire decision statistics

Based on MHCLG data, the year to March 2026

88%

Overall approval rate

Above avg (87%) #157 of 296

88%

Householder approved

Below avg (90%) #220 of 296

35%

Decided in 8 weeks

Below avg (63%) #279 of 296

64%

Extended time limit

Above avg (41%) #277 of 296

74%

Minor dwellings approved

100 decided (1-9 homes)

81%

Major dwellings approved

21 decided (10+ homes)

91%

Change of use approved

75 decided

1,096

Total decisions

132 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.