1 Alexander Place Irthlingborough NN9 5UX Data via plota.co.uk

In progress 26/02588/HFUL

Extensions & alterations

Council

North Northamptonshire 1.3/10

Date received

10 Sept 2026

Date validated

7 Oct 2026

Postcode

NN9 5UX

Description

Erection of a single-storey rear extension Data via plota.co.uk

Get alerts nearby Council site ↗

Last checked 8 Oct 2026, 06:54

Decision outlook

Plota predicts a decision between 2 Dec 2026 and 23 Dec 2026, from North Northamptonshire's recent extensions.

Day 2 of the 56-day target. North Northamptonshire usually decides extensions by day 63.

prediction

Day 261 days to the predicted decision (day 63)

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 →

Site constraints 3

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 Irthlingborough 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 · Not green belt · No scheduled monument at the site

Checked on 8 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.

Sales history 3

Last sold for £203,000 in June 2020. Semi-detached house, freehold.

12 June 2020£203,000

9 February 2012£127,000

12 April 2001£55,500

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

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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