14 Cavendish Square London W1G 9DB Data via plota.co.uk

26/05840/ADFULL - Approval of Details (Full PP) Approved
Admin / procedural

Proposal

Details of photographs and specification of facing materials; external doors, windows, sliding roof lights, and railings; and all sides of roof access pursuant to conditions 21, 25 and 26 of planning permission dated 11 March 2026 (RN: 25/07886/FULL). (Linked with 26/05855/ADLBC) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
25 Aug 2026
✓
Approved
8 Oct 2026

Approved on 8 Oct 2026 · Delegated Decision · Last checked 9 Oct 2026

Documents 43

Decision & officer reports 2

PDF APPR. OF DETAILS-FULL RESMAT [PE] Decision Notice · 8 Oct 2026 View ↗ PDF DELEGATED REPORT Report · 8 Oct 2026 View ↗

Statements & assessments 2

PDF PLANNING STATEMENT FOR DOC3 FULL Superseded document · 25 Aug 2026 View ↗ PDF PLANNING STATEMENT FOR DOC3 FULL Planning Statement · 25 Aug 2026 View ↗

Plans & drawings 25

PDF REAR TERRACE BALUSTRADE DETAIL_P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3110 PR_EXT WINDOW EW-G-06_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3101 PR_EXT WINDOW TYPE 01_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3105 PR_EXT WINDOW TYPE 05_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3102 PR_EXT WINDOW TYPE 02_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3104 PR_EXT WINDOW TYPE 04_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3103 PR_EXT WINDOW TYPE 03_P07 Drawing · 25 Aug 2026 View ↗ PDF 243_3050 PR_EXT DOOR TYPE 01_P07 Drawing · 25 Aug 2026 View ↗ PDF 243_3051 PR_EXT DOOR ED-01-01_P07 Drawing · 25 Aug 2026 View ↗ PDF 243_3100 PR_EXT WINDOW OVERVIEW _P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3040 PR_EXT DOOR ED-03-02_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3041 PR_EXT DOOR ED-03-03_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3002 PR_EXT DOOR ED-LG-05_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3042 PR_EXT DOOR ED-RF-01_P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3010 PR_EXT DOOR ED-G-01_P06 Drawing · 25 Aug 2026 View ↗ PDF ROOF TERRACE BALUSTRADE OVERVIEW_P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3001 PR_EXT DOOR ED-LG-01_P06 Drawing · 25 Aug 2026 View ↗ PDF VAULT 3_P01 Drawing · 25 Aug 2026 View ↗ PDF VAULT 2_P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3000 PR_EXT DOOR OVERVIEW _P01 Drawing · 25 Aug 2026 View ↗ PDF REAR TERRACE BALUSTRADE DETAIL_P01 Drawing · 25 Aug 2026 View ↗ PDF VAULT 1_P01 Drawing · 25 Aug 2026 View ↗ PDF 243_3130 PR_EXT WINDOW EW-03-01_P06 Drawing · 25 Aug 2026 View ↗ PDF 243_3210 PR_ROOFLIGHT RL-04-01_P06 Drawing · 25 Aug 2026 View ↗ PDF REFUSE PLATFORM P01 Drawing · 25 Aug 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 25 Aug 2026 View ↗

Other documents 13

PDF ACK-APPROVAL OF DETAILS APPL. Background Papers · 10 Sept 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 4 Sept 2026 View ↗ PDF APPLICATIONFORMREDACTED Superseded document · 25 Aug 2026 View ↗ PDF SPECIFICATION EXTRACT DOC3 FULL Other · 25 Aug 2026 View ↗ PDF ROOF TERRACE BALUSTRADE OVERVIEW_P01 Superseded document · 25 Aug 2026 View ↗ PDF ISSUE SHEET PLANNING_260825_DOC3 FULL Superseded document · 25 Aug 2026 View ↗ PDF REAR TERRACE BALUSTRADE OVERVIEW_P01 Superseded document · 25 Aug 2026 View ↗ PDF ISSUE SHEET PLANNING_260825_DOC3 FULL Background Papers · 25 Aug 2026 View ↗ PDF MATERIALS CONDITIONS DISCHARGE_P01 Other · 25 Aug 2026 View ↗ PDF REAR TERRACE BALUSTRADE OVERVIEW_P01 Superseded document · 25 Aug 2026 View ↗ PDF SPECIFICATION EXTRACT RAILNGS_P01 Background Papers · 25 Aug 2026 View ↗ PDF EXTERNAL IRONMONGERY SCHEDULE_P01 Background Papers · 25 Aug 2026 View ↗ PDF SPECIFICATION EXTRACT DOC3 FULL_P01 Background Papers · 25 Aug 2026 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 11

Grade II* listed: Bridge
List entry 1066306 · The pin is inside its outline · 39 more listed buildings within 150 m (4 Grade II*, 35 Grade II)
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 the other 39 with distances
Historic England ↗
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 2.5
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 ↗
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 1606 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; Town centre 19 m away: West End; Priority habitat 31 m away: Deciduous woodland.
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.

Sales history 1

Last sold for £21,300,000 in January 2025. Other property, freehold.

24 January 2025£21,300,000Recorded as a transfer outside a standard sale

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
W1G 9DB
Received
25 Aug 2026
Validated
25 Aug 2026
Ward
Marylebone
Case officer
Show
Target decision
20 Oct 2026
Decision
Application Permitted
Decision date
8 Oct 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Sanchez Benton Architects Ltd

Public comments

No public comments yet.

Last counted 9 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15184726
Planning Portal ref
PP-15184726
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025
Refurbishment of 14 Cavendish Square, including modest internal and external alterations…
25/07887/LBC
2025
Refurbishment of 14 Cavendish Square, including modest internal and external alterations…
25/07886/FULL
2025 Approved
Details of an Operational Management Plan pursuant to Condition 3 of planning permission…
25/05407/ADFULL
2025 Refused
Details Operational Management Plan pursuant to Condition 3 (A and B) of planning permiss…
25/04137/ADFULL
2025
Use of lower ground, ground, first, and second floors as a not-for-profit museum (Use Cla…
25/00722/FULL
2024
Extension of the existing residential unit at lower ground floor. (Linked with 24/01820/F…
24/01801/LBC
2024
Variation of condition 1 of planning permission dated 16 October 2019 (RN 19/05920/FULL)…
24/01820/FULL
2022 Approved
Installation of new watermist fire suppression system to ground, first and second floor…
22/02429/LBC
2022
Details pursuant to condition 3 of listed building consent dated 16 October 2019 (19/0600…
22/02395/ADLBC
2022
Details pursuant to Conditions 8 and 10 of planning permission dated 16 October 2019 (19/…
22/02396/ADFULL
2020 Approved
Dual/alternative use of part basement, part ground floor and first to third floors as off…
20/02969/FULL
2019 Approved
Variation of Condition 1 of listed building consent dated 19 February 2016 (RN: 15/10412/…
19/06005/LBC
2019 Approved
Variation of Condition 1 of planning permission dated 19 February 2016 (RN: 15/10411/FULL…
19/05920/FULL
2019 Approved
Amendments to planning permission dated 19 February 2016 (RN: 15/10411/FULL) for: Install…
19/05423/NMA
2019 Approved
Details of waste storage pursuant to Condition 11 of planning permission dated 19 Februar…
19/00330/ADFULL
Within ~100m

Nearby activity

2025 Approved
13 Harley Street London W1G 9QG
Internal alterations throughout the building to include the construction of four demounta…
25/04782/LBC
2025 Approved
13 Harley Street London W1G 9QG
Creation of new terrace areas at ground floor level within a lightwell and at the rear of…
25/04781/FULL
2025 Approved
9 Cavendish Square London W1G 9DF
Installation of a non-mechanical louvre at lower ground floor level on the Chandos Street…
25/05090/FULL
2025 Approved
12 Harley Street London W1G 9PB
Installation of new handrails at no.8, 10 and 12; and repairs to existing front entrance…
25/04974/LBC
2025 Approved
12 Harley Street London W1G 9PB
Installation of new handrails at no.8, 10 and 12; and repairs to existing front entrance…
25/04973/FULL
2025
First Floor 15 Harley Street London W1G 9QQ
Re-orientation of an existing air handling unit (AHU) located on the rooftop of the moder…
25/06470/LBC
2025
First Floor 15 Harley Street London W1G 9QQ
Re-orientation of an existing air handling unit (AHU) located on the rooftop of the moder…
25/06469/FULL
2025
Cavendish House 18 Cavendish Square London W1G 0PJ
Removal of double doorway with surrounding frame and glazing, provision of matwell, refur…
25/06186/LBC
2025 Approved
10A Chandos Street London W1G 9DQ
Display for a temporary period of six months of a non-illuminated estate agent board atta…
25/03455/AD7
2025
4 Dean's Mews London W1G 9EF
Removal of the existing roof features and creation of a single storey extension, the exca…
25/02391/FULL
2025
4 Dean's Mews London W1G 9EF
Removal of the existing roof features and creation of a single storey extension, the exca…
25/02392/LBC
2025
Cavendish Square London
Display of non illuminated egg sculpture and plinth measuring 0.5m X 1.6m for a temporary…
25/00886/ADV
2024
12 Harley Street London W1G 9PB
Installation of new handrails and replacement of existing front entrance steps at 8, 10 a…
24/07385/LBC
2024
12 Harley Street London W1G 9PB
Installation of new handrails and replacement of existing front entrance steps at 8, 10 a…
24/07384/FULL
2024 Withdrawn
1 - 7 Harley Street London W1G 9QD
Minor internal and external alterations in connection with the installation of photovolta…
24/02588/LBC
2024 Withdrawn
1 - 7 Harley Street London W1G 9QD
Minor internal and external alterations in connection with the installation of photovolta…
24/02587/FULL
2024
Open Space In Centre Cavendish Square London W1G 9DB
Temporary display of signages at Cavendish Square in association with the Underbelly Fest…
24/02997/ADV
2024
Open Space In Centre Cavendish Square London W1G 9DB
Installation of a Spiegeltent touring structure (with an internal capacity of up to 400)…
24/02996/FULL
2023 Refused
9 Cavendish Square London W1G 9DF
Replacement of existing windows at 9 Cavendish Square with double glazed slim-line timber…
23/08915/FULL
2023 Approved
12 Harley Street London W1G 9PB
Installation of a replacement boiler within the front pavement vaults and installation of…
23/04505/LBC
2021 Approved
10A Chandos Street London W1G 9DQ
Display for a temporary period of six months of a non-illuminated estate agent board atta…
21/00654/AD7
2021 Approved
Harcourt House 19 Cavendish Square London W1G 0PL
Installation of two building identification signs.
21/00156/LBC
2020 Approved
21 Harley Street London W1G 9QL
Repairs to the brickwork on the front facade and the installation of air bricks on the fr…
20/07673/LBC
2020 Approved
21 Harley Street London W1G 9QL
Repairs to the brickwork on the front facade of the building; and the installation of air…
20/07672/FULL
2020 Approved
7 - 10 Chandos Street London W1G 9EH
Replacement of existing vehicular access door with roller shutter door and new timber ped…
20/07227/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

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