Studio 4 Diamond Business Centre Attley Way Irthlingborough NN9 5GF Data via plota.co.uk

26/02526/LBC - Listed Building Consent In progress

Proposal

Proposed mezzanine, air-conditioning, photo voltaic panels and internal works Data via plota.co.uk

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View original council record ↗Last checked 27 Oct 2026, 02:07

Street View

Application progress

✓

Received

4 Sept 2026

✓

Consultation

11 Sept 2026

Decision

Expected by 30 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 30 Oct 2026 and 20 Nov 2026, from North Northamptonshire's recent extensions.

The consultation period closed on 15 Oct 2026.

Documents 6

Statements & assessments 2

PDF Design and accessstatement-internal works Document - Supporting · 4 Sept 2026 View ↗ PDF Heritage statement Document - Supporting · 4 Sept 2026 View ↗

Application forms 2

PDF Applicationform Application Form · 4 Sept 2026 View ↗ PDF Applicationformredacted Application Form · 4 Sept 2026 View ↗

Site constraints 9

Habitat network: Network Expansion Zone

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

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 ↗

1 listed building within 150 m

Nearest: Irthlingborough Casual Wards, Grade II, 40 m away

The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.

Historic England ↗

Scheduled monument 139 m away: Crow Hill Iron Age hillfort with associated Iron Age, Roman and Medieval settlements

Its setting is a consideration for work nearby.

Nationally important archaeology protected by the Secretary of State. Work that affects the monument or its setting is rarely permitted.

Historic England ↗

Also on the record

Nature improvement area: Nene Valley; Special protection area 500 m away: Upper Nene Valley Gravel Pits; SSSI 500 m away: Upper Nene Valley Gravel Pits SSSI; 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

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.

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Important details

Council: North Northamptonshire
Application type: Listed Building Consent
Postcode: NN9 5GF
Received: 4 Sept 2026
Validated: 4 Sept 2026
Ward: Irthlingborough
Parish: Irthlingborough CP
Target decision: 30 Oct 2026
Applicant: Show
Agent: Toby Pateman Architect Ltd.

Decision outlook

Day 54 of the 56-day target. North Northamptonshire usually decides extensions by day 63.

prediction

Day 549 days to the predicted decision (day 63)

45%decided within 8 weeks

87%approved

562decided 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 26 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15125706
Planning Portal ref: PP-15125706
Consultation: 11 Sept 2026
Comments by: 15 Oct 2026
Site or press notice: 14 Sept 2026
Statutory expiry: 30 Oct 2026
Env. assessment: No

North Northamptonshire

Planning Authority Score

1.3/10

Poor

#285 of 296 councils

Relevant to this application:

Other 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