6 Grosvenor Street London W1K 4DJ Data via plota.co.uk

26/05786/CLOPUD - Certificate of Lawfulness (proposed) Approved
Admin / proceduralCommercial premises

Proposal

Confirmation that the planning permission dated 31 July 2024 (RN: ) for the: Refurbishment and extension of existing Class E building to include the extension of the fifth floor, partial demolition and reconstruction of the sixth floor, erection of a new seventh floor with external terrace, alterations to the Avery Row and Grosvenor Street elevations to include new shopfronts, entrances and replacement windows, installation of green roof and photovoltaic panels at main roof level and installation of screened plant at seventh floor level. (SITE INCLUDES 4 GROSVENOR STREET), was lawfully implemented prior to the expiration date and that it is lawful to complete the outstanding works. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
24 Aug 2026
✓
Approved
15 Sept 2026

Approved on 15 Sept 2026 · Delegated Decision · Last checked 16 Sept 2026

Documents 9

Decision & officer reports 2

PDF GRANT OF CLOPUD [PE] Decision Notice · 15 Sept 2026 View ↗ PDF DELEGATED REPORT Report · 15 Sept 2026 View ↗

Statements & assessments 3

PDF PROPOSED DRAINAGE LAYOUT SKETCH Drawing · 24 Aug 2026 View ↗ PDF TYPICAL BELOW GROUND DRAINAGE DETAIL Drawing · 24 Aug 2026 View ↗ PDF BELOW GROUND DRAINAGE GA BASEMENT LEVEL Drawing · 24 Aug 2026 View ↗

Plans & drawings 1

PDF SITE LOCATION PLAN Location Plan · 24 Aug 2026 View ↗

Other documents 3

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 2 Sept 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 27 Aug 2026 View ↗ PDF COVER LETTER Background Papers · 24 Aug 2026 View ↗

All documents on the council site ↗

Associated applications 2

  • Part of

    Fullcouncil archive
    • LawfulnessConfirmation that the planning permission dated 31 July 2024 (RN) for the: Refurbishment…This application26/05786/CLOPUD

Site constraints 11

Mayfair 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 2.5
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 ↗
Town centre: West End
A designated centre in the London Plan.
Shops, services and active frontages are protected in centres, and main town centre uses are steered here first.
62 listed buildings within 150 m
Nearest: 74, Grosvenor Street W1, Grade II, 23 m away · 1 Grade I, 2 Grade II*, 59 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 62 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 1230 m away: Thames Tideway Tunnel; Registered park or garden 216 m away: Berkeley Square; Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 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.

Building

Floor area212 m² (2,282 sq ft)
Energy ratingC (asset rating 71)
UseB1 Offices and Workshop businesses
HeatingHeating and Natural Ventilation

From the energy performance certificate lodged in April 2015, 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
Certificate of Lawfulness (proposed)
Postcode
W1K 4DJ
Received
24 Aug 2026
Validated
24 Aug 2026
Ward
West End
Case officer
Show
Target decision
19 Oct 2026
Decision
Application Permitted
Decision date
15 Sept 2026
Decision level
Delegated Decision
Agent
DP9 Limited

Public comments

No public comments yet.

Last counted 16 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15159568
Planning Portal ref
PP-15159568
Env. assessment
No

Historical activity at this location

26 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2023
Refurbishment and extension of existing Class E building to include the extension of the…
23/08374/FULL
Within ~100m

Nearby activity

2025
Penthouse A 21 Davies Street London W1K 3DE
Replacement of all windows and doors, including their frames, on the upper level (6th flo…
25/07862/FULL
2025
Claridges Hotel 47 - 57 Brook Street West End London W1K 4HR
Replacement of shopfronts and balustrades, and facade repair works including replacement…
25/07266/LBC
2025
Claridges Hotel 47 - 57 Brook Street West End London W1K 4HR
Replacement of shopfronts and balustrades, and facade repair works including replacement…
25/07265/FULL
2025
28 Grosvenor Street London W1K 4QR
Demolition and rebuilding of the 4th floor and roof level to create a sunken roof terrace…
25/07048/FULL
2025 Approved
Hermione House 61 Grosvenor Street London W1K 3JE
Removal of stone stairs from the street down into the front lightwell; Removal of flagpol…
25/04608/FULL
2025 Approved
21 - 22 Grosvenor Street London W1K 4QJ
Provision of a lead cloaking to the stone cornice above the ground floor on the front ele…
25/03736/LBC
2025 Approved
17 Grosvenor Street London W1K 4QH
Infill extension at rear 4th floor; erection of a single storey extension at 5th floor wi…
25/01813/FULL
2025
66 Grosvenor Street London W1K 3JH
Relocation of internal AHUs into new joinery; new kitchen joinery; removal of radiators…
25/03189/LBC
2025
66 Grosvenor Street London W1K 3JH
Relocation of internal AHUs into new joinery; new kitchen joinery; removal of radiators…
25/03188/FULL
2025
Broadbent House 64 - 65 Grosvenor Street London W1K 3JH
Amendments to fourth floor glazing and installation of glazed doors for use of the existi…
25/02852/FULL
2025
67 - 68 Grosvenor Street London W1K 3JN
External alterations including the installation of a dry riser cabinet within the front l…
25/02652/FULL
2025
26 Grosvenor Street London W1K 4QJ
New terrace at first floor level to rear, increase size of rear terrace at lower ground f…
25/01853/FULL
2025
21 - 22 Grosvenor Street London W1K 4QJ
Repairs and replacements to localised parts of the roof.
25/01661/CLLB
2025
19 Brook's Mews London W1K 4DX
Display of logos and text on two new awnings measuring 3.50m x 1.40m & 5.00m x 1.40m, and…
25/01494/ADV
2025
26 Grosvenor Street London W1K 4QJ
Removal of water tank and existing projecting access enclosure on the roof and creation o…
25/01294/FULL
2025 Approved
2 - 2A Davies Street London W1K 3DJ
3 x London plane (T1, T2 & T3): Crown reduce to previous, most recent reduction points (r…
25/00551/TPO
2024
66 Grosvenor Street London W1K 3JH
Insertion of an opening in the party wall for a new door at ground floor level between 66…
24/06814/LBC
2024
67 - 68 Grosvenor Street London W1K 3JN
Erection of a single storey extension within the central courtyard with a terrace over pa…
24/06813/FULL
2024
26 Grosvenor Street London W1K 4QJ
Removal of water tank and existing projecting access enclosure on the roof and creation o…
24/03934/FULL
2024
55 Grosvenor Street London W1K 3HZ
Creation of two terraces on 2nd floor facing the rear courtyard and associated installati…
24/01169/FULL
2019 Approved
57 Grosvenor Street London W1K 3JA
Display for a temporary period of six months of a non-illuminated estate agent board atta…
19/04027/AD7
2019 Approved
2-2A Davies Street London W1K 3DJ
3 x London planes: crown reduce to previous, most recent reduction points.
19/01166/TPO
2019 Approved
21-22 Grosvenor Street London W1K 4QJ
Display for a temporary period of six months of a non-illuminated estate agent board atta…
19/01124/AD7
2018 Approved
Flat 3 The Manor 4-12 Davies Street London W1K 3DW
Installation of new double glazed timber-framed hardwood sash windows at first floor, and…
18/10879/FULL
2018 Refused
Claridge House, Flat 8 32 Davies Street London W1K 4ND
Installation of an air conditioning unit onto an existing services platform within existi…
18/10245/FULL
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

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.