15 Juniper Avenue Whiston Knowsley L35 1AA Data via plota.co.uk

26/00101/FUL - Full Application Approved

Proposal

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

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View original council record ↗Last checked 24 Aug 2026, 08:55

Application progress

✓

Received

12 Mar 2026

✓

Approved

27 Apr 2026

Approved on 27 Apr 2026 · Delegated Decision · Last checked 5 Jul 2026

Documents

View the documents on the council's website ↗

Site constraints 4

Agricultural land, grade 3b, surveyed

Not best and most versatile land (grades 1, 2 and 3a). Source: Natural England's post-1988 ALC field survey (Wolverhampton). Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 2; the survey is the definitive reading.

Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.

Survey report ↗

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 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

Coalfield, development low risk area.

Not affected

Outside flood zones 2 and 3 · Not green belt · 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 Mining Remediation Authority, 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 £214,995 in September 2022. Semi-detached house, freehold.

26 September 2022£214,995New build

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

Building

Floor area77 m² (829 sq ft)

Energy ratingB (84 out of 100), could reach A

PropertySemi-detached house

Built2022

HeatingBoiler and radiators, mains gas

WallsAverage thermal transmittance 0.24 W/m²K

From the energy performance certificate lodged in August 2022, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council: Knowsley
Application type: Full Application
Postcode: L35 1AA
Received: 12 Mar 2026
Validated: 12 Mar 2026
Ward: Whiston & Cronton
Case officer: Show
Target decision: 7 May 2026
Decision: Granted
Decision date: 27 Apr 2026
Decision level: Delegated Decision
Applicant: Show
Agent: Keith Swain Design

How this decision compares

Decided in 46 days from validation, 7 days faster than Knowsley's median of 53 for extensions. Approved, as 98% of extensions here are.

This one46d

Council53d

UK55d

73%decided within 8 weeks

98%approved

143decided in the last year

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

Consultation & key dates

Statutory expiry: 7 May 2026
Env. assessment: No

Historical activity at this location

1 nearby application on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2020 Approved

Disused Railway Line Extending From M62 Motorway Extending North Through Halsnead Park And To Rear Of Cronton Avenue, Whiston, Knowsley

CONSTRUCTION OF MULTI-USE PATH AND ASSOCIATED GROUND WORKS INCLUDING THE FACILITATION OF…

19/00651/FUL 2 Mar 2021

Knowsley

Planning Authority Score

4.8/10

Below average

#159 of 296 councils

Relevant to this application:

Householder decisions

Knowsley ranks #186 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (95%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance

Knowsley decision statistics

Based on MHCLG data, the year to March 2026

94%

Overall approval rate

Above avg (87%) #41 of 296

95%

Householder approved

Above avg (90%) #83 of 296

60%

Decided in 8 weeks

Below avg (63%) #186 of 296

45%

Extended time limit

Above avg (41%) #191 of 296

92%

Minor dwellings approved

12 decided (1-9 homes)

67%

Major dwellings approved

6 decided (10+ homes)

83%

Change of use approved

23 decided

299

Total decisions

19 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.