4 Clarke's Mews London W1G 6QN Data via plota.co.uk

25/05464/FULL - Full Planning Permission Application Approved

Proposal

Installation of one air conditioning unit at roof level Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
4 Aug 2025
✓
Validated
10 Sept 2025
✓
Consultation
10 Oct 2025
✓
Approved
29 Apr 2026

Approved on 29 Apr 2026 · Complex Delegated Decision · Last checked 18 Oct 2026

Documents 19

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 6 May 2026 View ↗ PDF DELEGATED REPORT Report · 6 May 2026 View ↗

Statements & assessments 3

PDF SUSTAINABLE DESIGN STATEMENT Background Papers · 10 Sept 2025 View ↗ PDF DESIGN ACCESS STATEMENT4CLARKESMEWS Design and Access Statement · 4 Aug 2025 View ↗ PDF HERITAGE STATEMENT 4CLARKESMEWS Background Papers · 4 Aug 2025 View ↗

Plans & drawings 3

PDF LOCATION PLANS Drawing · 4 Aug 2025 View ↗ PDF EXISTING PLANS, ELEVATIONS AND SECTIONS Drawing · 4 Aug 2025 View ↗ PDF PROPOSED ELEVATIONS, PLANS AND SECTIONS Drawing · 4 Aug 2025 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 4 Aug 2025 View ↗ PDF FEECALCULATION Background Papers · 4 Aug 2025 View ↗

Consultation & comments 1

PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 10 Oct 2025 View ↗

Other documents 8

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 10 Oct 2025 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 10 Oct 2025 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 10 Oct 2025 View ↗ PDF ACOUSTIC REPORT Acoustic report · 10 Sept 2025 View ↗ PDF RECEIPT OF APPLICATION Other · 12 Aug 2025 View ↗ PDF RECEIPT OF APPLICATION Other · 12 Aug 2025 View ↗ PDF 1ST INVALID LETTER Background Papers · 12 Aug 2025 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 4 Aug 2025 View ↗

All documents on the council site ↗

Site constraints 10

Harley Street conservation area
Demolition needs planning permission and permitted development is restricted.
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.
Council document ↗
2 Article 4 directions
Article 4 Basement Development Permitted Rights Removed · Article 4 Direction Class E To C3 In Central Activities Zone. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Archaeological priority area: City of Westminster APA 2.6
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
Air quality management area: Westminster AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
31 listed buildings within 150 m
Nearest: 14-23, Upper Wimpole Street W1, Grade II, 3 m away · 3 Grade II*, 28 Grade II
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.
Show all 31 with distances
Historic England ↗
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
Also on the record
National infrastructure project 419 m away: London Strategic Heat Main Project, at pre-application; Inside the City of Westminster built-up area; Public transport access: PTAL 6a (excellent), TfL 2023, for the 100 m square; Town centre 65 m away: Marylebone High Street.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 2 November 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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 £3,650,000 in March 2025. Terraced house, leasehold.

More than one property is recorded at this address: HM Land Registry does not always give the flat or unit.

31 March 2025£3,650,000
2 May 2006£1,488,000
15 February 2006£499,300Flat or maisonette

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

Building

Floor area145 m² (1,561 sq ft)
Energy ratingE (51 out of 100), could reach C
PropertyMid-terrace house, 5 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in May 2022, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
W1G 6QN
Received
4 Aug 2025
Validated
10 Sept 2025
Ward
Marylebone
Case officer
Show
Target decision
5 Nov 2025
Decision
Application Permitted
Decision date
29 Apr 2026
Decision level
Complex Delegated Decision
Applicant
Show
Agent
Chris Scott Architects

How this decision compares

Decided in 231 days from validation, 155 days slower than Westminster's median of 76 for full applications. Approved, as 86% of full applications here are.

35%decided within 8 weeks
86%approved
2,198decided in the last year

Plota live figures for full applications decided by Westminster in the last twelve months, from validation. Westminster decision record →

Public comments

1comment received
1 objecting

16 neighbours consulted · Last counted 18 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14230110
Planning Portal ref
PP-14230110
Comments by
12 Nov 2025
Site or press notice
10 Oct 2025
Env. assessment
No

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
Flat 2 19 Upper Wimpole Street London W1G 6LY
Installation of a new slim double-glazed timber window, painted white within the existing…
25/06205/LBC
2025 Approved
Flat 2 19 Upper Wimpole Street London W1G 6LY
Installation of a new slim double-glazed timber window, painted white within the existing…
25/06204/FULL
2025
41 Devonshire Place London W1G 6JY
Reinstatement of the brick arches to the vaults; the reinstatement of the brickwork bridg…
25/07573/LBC
2025
41 Devonshire Place London W1G 6JY
Reinstatement of the brick arches to the vaults; the reinstatement of the brickwork bridg…
25/07572/FULL
2025 Approved
21 Westmoreland Street London W1G 8PN
Renovation of the entrance steps to 19 and 21 Wesley Street, reducing number of steps fro…
25/05280/FULL
2025
16 Beaumont Mews London W1G 6EJ
Variation of conditions 1 and 4 of planning permission dated 12th June 2024 (RN:24/03039/…
25/07149/FULL
2025 Refused
15 Upper Wimpole Street London W1G 6LS
Infilling of courtyard between the main house and mews house at basement and ground level…
25/05010/LBC
2025
47 Weymouth Street London W1G 8NE
Rear extension at basement level and extension of the roof terrace at first floor level.
25/06502/LBC
2025
16 Beaumont Mews London W1G 6EJ
Variation of conditions 1 and 13 of planning permission 19 February 2025 (RN: 24/03039/FU…
25/05859/FULL
2025
42 Wimpole Street London W1G 8YF
Internal alterations including strip out various bathrooms, installation of a stud wall t…
25/02216/LBC
2025
12 Upper Wimpole Street London W1G 6LW
Display of a non-illuminated estate agents sign measuring 0.60m x 0.90m attached to the r…
25/01552/AD7
2025
15 Upper Wimpole Street London W1G 6LS
Infilling of courtyard between the main house and mews house at basement and ground level…
25/00869/LBC
2025
15 Upper Wimpole Street London W1G 6LS
Variation of condition 1 of planning permission dated 17 September 2024 (RN:23/07898/FULL…
25/00868/FULL
2024
21 Westmoreland Street London W1G 8PN
Lowering of lower ground floor level; replacement garage flat roof at raised level; repla…
24/07696/FULL
2024
6 Upper Wimpole Street London W1G 6LG
Extension to the existing basement; replacement of third floor casement rear windows with…
24/06677/FULL
2024
6 Upper Wimpole Street London W1G 6LG
Extension to the existing basement; replacement of third floor casement rear windows with…
24/06678/LBC
2024
6 Upper Wimpole Street London W1G 6LG
Extensions and internal and external alterations to the existing property to facilitate t…
24/06469/LBC
2024
6 Upper Wimpole Street London W1G 6LG
Extensions and internal and external alterations to the existing property to facilitate t…
24/06468/FULL
2024
14 Upper Wimpole Street London W1G 6LR
Relocation of rainwater pipe from rear elevation to Devonshire Street elevation together…
24/05730/FULL
2024
14 Upper Wimpole Street London W1G 6LR
Relocation of rainwater pipe from rear elevation to Devonshire Street elevation together…
24/05731/LBC
2020 Approved
42 - 46 Weymouth Street London W1G 6NP
Replacement of existing steel external stairs from basement light-well with alterations t…
20/03817/FULL
2020 Refused
42 Wimpole Street London W1G 8YF
Display for a temporary period of six months of a non-illuminated estate agent board atta…
20/03527/AD7
2020 Approved
Flat 3 4 Upper Wimpole Street London W1G 6LD
Internal alterations to third floor flat.
20/02611/LBC
2020 Approved
3A Devonshire Mews South London W1G 6QW
Alterations to external glazing to courtyard elevations at lower ground floor
20/01297/FULL
2018 Approved
42 Wimpole Street London W1G 8YF
Internal alterations, including replacement of existing open shower on 1st floor with con…
18/10541/LBC
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #201 of 296
81%
Householder approved
Below avg (90%) #277 of 296
44%
Decided in 8 weeks
Below avg (63%) #258 of 296
28%
Extended time limit
Below avg (41%) #46 of 296
83%
Minor dwellings approved
12 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
81%
Change of use approved
133 decided
4,602
Total decisions
648 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

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.