Flat 11 46 Upper Grosvenor Street London W1K 2NW Data via plota.co.uk

26/01789/ADFULL - Approval of Details (Full PP) Refused
Admin / procedural

Proposal

Detailed drawings of existing and proposed windows with key details pursuant to condition 2 of planning permission dated 6th November 2025 (RN: 25/05340/FULL). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
19 Mar 2026
✗
Refused
5 May 2026
Appeal
Not lodged

Refused on 5 May 2026 · Delegated Decision · Last checked 8 Jul 2026

Documents 8

Decision & officer reports 2

PDF REFUSAL-AOD FULL [PE] Decision Notice · 5 May 2026 View ↗ PDF DELEGATED REPORT Report · 5 May 2026 View ↗

Plans & drawings 2

PDF EXISTING EXTERNAL FENESTRATION Drawing · 19 Mar 2026 View ↗ PDF PROPOSED EXTERNAL FENESTRATION Drawing · 19 Mar 2026 View ↗

Application forms 1

PDF APPLICATION FORM REDACTED Application Form · 19 Mar 2026 View ↗

Other documents 3

PDF ACK-APPROVAL OF DETAILS APPL. Background Papers · 20 Apr 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 26 Mar 2026 View ↗ PDF DISCHARGE OF CONDITION REPORT Background Papers · 19 Mar 2026 View ↗

All documents on the council site ↗

Associated applications 3

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 ↗
Article 4 direction
Article 4 Basement Development Permitted Rights Removed. Named permitted development rights are withdrawn here.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 ↗
45 listed buildings within 150 m
Nearest: 45, Upper Grosvenor Street W1, Grade II, 5 m away · 3 Grade II*, 42 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 45 with distances
Historic England ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
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.
Registered park or garden 70 m away: Grosvenor Square
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Also on the record
National infrastructure project 1614 m away: Thames Tideway Tunnel; 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 3 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 1

Last sold for £163,164 in August 2000. Flat or maisonette, leasehold.

14 August 2000£163,164New build

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

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Important details

Council
Westminster
Application type
Approval of Details (Full PP)
Postcode
W1K 2NW
Received
19 Mar 2026
Validated
19 Mar 2026
Ward
West End
Case officer
Show
Target decision
14 May 2026
Decision
Application Refused
Decision date
5 May 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Chirag Desai Architects
Leaseholder
Show

Consultation & key dates

Alt. reference
PP-14793568
Planning Portal ref
PP-14793568
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

2025 Approved
Replacement of existing windows. (Flat 11, 46 Upper Grosvenor Street)
25/05340/FULL
Within ~100m

Nearby activity

2025
41 Upper Grosvenor Street London W1K 2NH
External alterations including rooftop and rear extension; and reconfiguration and amalga…
25/07262/FULL
2025 Approved
Flat 61 Eaton House 39 - 40 Upper Grosvenor Street London W1K 2NG
Installation of replacement air conditioning unit on the roof.
25/04850/FULL
2025 Approved
30 Grosvenor Square London W1K 6AN
Display of non-illuminated sign on main entrance canopy measuring 0.2m x 3.78m
25/04508/ADV
2025 Approved
30 Grosvenor Square London W1K 6AN
Amendments to the Basement Level 1 internal layout
25/04210/LBC
2025
1 Culross Street London W1K 2DL
Excavation of a basement beneath 1A Culross Street, two vents at roof level and a single…
25/04814/FULL
2025
41 Reeves Mews London W1K 2EH
Reconfiguration and amalgamation of existing residential accommodation (comprising 2 x 2b…
25/04585/FULL
2024
41 Upper Grosvenor Street London W1K 2NH
Change of use of existing commercial use (Use Class E) to residential (Use Class C3) at b…
24/08720/FULL
2024
44 South Audley Street London W1K 2PX
Display of one internally illuminated fascia sign measuring 0.6m x 6.2m, one internally i…
24/08290/ADV
2024 Approved
American Embassy 24 - 31 Grosvenor Square London W1K 6AH
1 x London plane (T10): Crown lift/ cut back to provide 1.5m height and lateral clearance…
24/06838/TCA
2024 Approved
50 Park Street London W1K 2JJ
Minor alterations to interior of second floor.
24/06935/LBC
2024
Basement And Ground Floor 49 South Audley Street London W1K 2QD
Installation of 2 small external terrace heaters to shopfront.
24/06569/FULL
2024
9 Upper Grosvenor Street London W1K 2LZ
Installation of replacement sash windows at fourth floor level. (Linked with 24/06290/LBC)
24/06289/FULL
2024
9 Upper Grosvenor Street London W1K 2LZ
Installation of replacement sash windows at fourth floor level. (Linked with 24/06289/FUL…
24/06290/LBC
2024
6 Upper Grosvenor Street London W1K 2LU
External alterations including; partial demolition to accommodate a new and extended lift…
24/06182/LBC
2024
6 Upper Grosvenor Street London W1K 2LU
External alterations including; partial demolition to accommodate a new and extended lift…
24/06181/FULL
2024
35 - 37 Grosvenor Square London W1K 2HN
Installation of new plant equipment and enclosure at seventh-floor roof level of 35-37 Gr…
24/05532/FULL
2024
American Embassy 24 - 31 Grosvenor Square London W1K 6AH
Installation of permanent external planter boxes at ground floor level of Grosvenor Squar…
24/05112/FULL
2024
American Embassy 24 - 31 Grosvenor Square London W1K 6AH
Variation of conditions 1 and 46 of planing permission dated 18.02.2021 (RN: 20/06601/FUL…
24/05111/FULL
2024 Approved
Basement And Ground Floor 49 South Audley Street London W1K 2QD
Alterations to the shopfront including the addition of timber mouldings to the existing g…
24/01654/FULL
2024
34 Grosvenor Square London W1K 2HD
Retention of existing platform within lightwell fronting South Audley Street to provide s…
24/03143/FULL
2020 Approved
34 Grosvenor Square London W1K 2HD
Variation of Condition 2 of planning permission dated 01 September 2015 (RN: 15/05750/FUL…
20/04701/FULL
2019 Approved
38 Grosvenor Square London W1K 2HN
Internal alterations across all floors and external alterations including to the rear fac…
19/03131/LBC
2019 Approved
38 Grosvenor Square London W1K 2HN
Use as a mixed-use higher education academy, restaurant, members' club, cafe, library, ga…
19/03130/FULL
2020 Approved
35-37 Grosvenor Square London W1K 2HN
Remedial work to entrance doors, replacement of marble paving with Portland stone slabs i…
20/05086/FULL
2020 Approved
11 Upper Grosvenor Street London W1K 2NB
Display of a non-illuminated estate agents sign measuring 0.45m x 0.6m attached to the ra…
20/04952/AD7
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.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Leaseholders: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.