10 Spring Gardens London SW1A 2BN Data via plota.co.uk

26/05886/NMA - Non-material amendments Approved
Change of useSigns & advertsUtility infrastructure

Proposal

Amendments to planning permission dated 10 July 2025 (RN: ) for the use of part-ground, first, sixth, seventh and eighth floor levels as an Embassy (sui generis). Associated external alterations to the ground floor facade on Carlton House Terrace, and part ground floor to Piazza (Spring Gardens) frontage. External alterations to the doors. Installation of roof plant and security screens to the eighth floor; Namely, the addition of external attached building signage on the west elevation and south elevation, addition of two flagpoles on the west elevation, additional of a parcel pass through, rather than a fixed panel to the door on the north elevation and omission of a smoke vent and replacement paving to match existing paving. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
27 Aug 2026
✓
Validated
3 Sept 2026
✓
Approved
29 Sept 2026

Approved on 29 Sept 2026 · Delegated Decision · Last checked 30 Sept 2026

Documents 18

Decision & officer reports 2

PDF GRANT NON MATERIAL AMENDMENT Decision Notice · 29 Sept 2026 View ↗ PDF DELEGATED REPORT Report · 29 Sept 2026 View ↗

Plans & drawings 9

PDF PROPOSED - GROUND FLOOR PLAN Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - DETAIL TO WEST ELEVATION Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - FIRST FLOOR PLAN Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - WEST ELEVATION Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - NORTH ELEVATION Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - SOUTH ELEVATION Drawing · 27 Aug 2026 View ↗ PDF LOCATION PLAN Drawing · 27 Aug 2026 View ↗ PDF PARCEL PASS THROUGH - LEVEL 00 Drawing · 27 Aug 2026 View ↗ PDF PROPOSED - FIRST FIRST FLOOR ENTRANCE AND RAMP Drawing · 27 Aug 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 27 Aug 2026 View ↗ PDF FEECALCULATION Background Papers · 27 Aug 2026 View ↗

Other documents 5

PDF ACK - NON-MATERIAL AMENDMENT Background Papers · 11 Sept 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 3 Sept 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 3 Sept 2026 View ↗ PDF COVER LETTER Background Papers · 3 Sept 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 27 Aug 2026 View ↗

All documents on the council site ↗

Site constraints 13

St James's 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.
Protected view corridor: 2A.2 Parliament Hill summit to the Palace of Westminster
Inside the landmark viewing corridor of a protected vista. A building that rises above the corridor's threshold height should be refused. How high that is depends on where along the view the site is. Also in the corridor of 2B.1 Parliament Hill oak tree to the Palace of Westminster; 4A.2 Primrose Hill summit to the Palace of Westminster.
The London Plan (policy HC4) designates strategic views, and the Mayor's London View Management Framework (March 2012) gives 13 of them a protected vista toward St Paul's Cathedral, the Palace of Westminster or the Tower of London. A vista has a threshold height that rises or falls with the line of sight. In the landmark viewing corridor, a building above it would harm the view and should be refused. In the wider setting consultation area around the corridor, a building above it is referred for consultation and its effect on the view is judged. The threshold changes along each view and is set out in the framework. A revised framework is out for consultation until 4 December 2026 and is not yet in force.
London View Management Framework ↗
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 ↗
National infrastructure project 64 m away: Thames Tideway Tunnel
The site is 64 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted. Also within 2 km: London Strategic Heat Main Project (at pre-application, 23 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
37 listed buildings within 150 m
Nearest: Numbers 10 to 18 (Including the Institute of Contemporary Arts) and Railings to North and West, Grade I, 11 m away · 7 Grade I, 1 Grade II*, 29 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 37 with distances
Historic England ↗
Registered park or garden 42 m away: St James's Park
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 ↗
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.
Also on the record
Inside the City of Westminster built-up area; Public transport access: PTAL 6b (excellent), TfL 2023, for the 100 m square; Town centre 66 m away: West End.
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.

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Important details

Council
Westminster
Application type
Non-material amendments
Postcode
SW1A 2BN
Received
27 Aug 2026
Validated
3 Sept 2026
Ward
St James's
Case officer
Show
Target decision
1 Oct 2026
Decision
Application Permitted
Decision date
29 Sept 2026
Decision level
Delegated Decision
Applicant
Show
Agent
WSP in the UK & Ireland

How this decision compares

Decided in 26 days from validation, 31 days faster than Westminster's median of 57 for changes of use. Approved, as 83% of changes of use here are.

49%decided within 8 weeks
83%approved
172decided in the last year

Plota live figures for changes of use decided by Westminster in the last twelve months, from validation. Westminster decision record →

Public comments

No public comments yet.

Last counted 30 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15086846
Planning Portal ref
PP-15086846
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Display of advertisements on hoardings including a living wall measuring 13.4m x 3.47m; 1…
25/04055/ADV
2025 Approved
Amendments to planning permission dated 15 May 2023 (RN 22/07991/FULL) for the Variation…
25/01802/NMA
2025 Approved
Details of an Electric Vehicle charging point for LGV delivery use (minimum 50kW three ph…
25/01748/ADFULL
2024 Approved
Details of planting scheme and management plan in relation to the undercroft planting and…
24/04487/ADFULL
2024
Details of locations of the CCTV cameras pursuant to Condition 4 (part c) of planning per…
24/05777/ADFULL
2024 Approved
Display of advertisements on hoardings measuring 2.44m x 46.82m, 2.44m x 13.29m, 2.44m 19…
24/03640/ADV
2022 Approved
Details of a) appropriate measures to secure the works to the highway in association with…
22/07099/ADFULL
2022 Approved
Variation of Condition 1 of planning permission dated 23 July 2021 (RN: 21/02401/FULL) fo…
22/07991/FULL
2021 Withdrawn
Details of a) appropriate measures to secure the works to the highway in association with…
21/05671/ADFULL
2021 Approved
Refurbishment of the existing building including relocation and provision of mechanical p…
21/02401/FULL
2021 Approved
Installation of stone balustrade and bollards.
21/02047/FULL
2021 Approved
Use of 10 Spring Gardens for purposes falling within Class E (Commercial, Business and Se…
21/01666/CLEUD
2018 Approved
Installation of a replica of Nelson Mandela's cell from Robben Island to be exhibited on…
18/03852/FULL
2016 Withdrawn
Installation of a pavilion in conjunction with the City Nomads exhibition at 10 Spring Ga…
16/02745/FULL
Within ~100m

Nearby activity

2025 Approved
22 Boston Parade Boston Road Hanwell W7 2DG
Alteration to shopfront to install a new entrance door to facilitate access to the upper…
252515FUL
2025 Approved
First Floor Flat 15A Boston Parade Boston Road Hanwell W7 2DG
Rear roof extension incorporating a Juliet balcony; installation of two rooflights to fro…
252685FUL
2024
24 Boston Parade Boston Road Hanwell W7 2DG
Change of use of part ground floor rear (Retail Use Class E) into a self contained flat (…
244858FUL
2023 Approved
18 Boston Gardens Boston Road Hanwell W7 2AN
Single storey side extension; single storey rear extension (following demolition of exist…
234658HH
2023 Approved
20 Southdown Avenue Hanwell W7 2AQ
Part single, part two storey side extension; single storey rear extension (following demo…
230736HH
2023 Approved
20 Southdown Avenue Hanwell W7 2AQ
Alteration of roof from hip to gable end, rear roof extension, installation of three roof…
230248CPL
2022 Approved
22 Southdown Avenue Hanwell London W7 2AQ
Single storey side/rear (wrap around) extension following demolition of existing side add…
223692HH
2022 Approved
24 Boston Parade Boston Road Hanwell London W7 2DG
Installation of window to ground floor side elevation
222450FUL
2022 Approved
16A Boston Parade Boston Road Hanwell London W7 2DG
Conversion of two bedroom first floor flat into two flats, incorporating a rear roof exte…
220629FUL
2021 Approved
22 Southdown Avenue Hanwell London W7 2AQ
Single storey rear and side (wraparound) extension; first floor side extension; first flo…
217144HH
2021 Approved
22 Southdown Avenue Hanwell London W7 2AQ
Alteration of roof from hip to gable end and rear roof extension and installation of two…
217143CPL
2021 Refused
16A Boston Parade Boston Road Hanwell London W7 2DG
Conversion of two bedroom first floor flat into two flats, incorporating a rear roof exte…
216841FUL
2021 Refused
Garages Rear Of 10-24 Byron Court Boston Road Hanwell London W7 2AY
Construction of single storey building comprising 7 self-contained apartments (Class C3 U…
212247FUL
2021 Approved
23 Southdown Avenue Hanwell London W7 2AG
Hip to gable end roof extension; rear roof extension,and installation of two roof lights…
212091CPL
2020 Approved
2 Boston Gardens Boston Road Hanwell London W7 2AN
Single storey rear extension; Conversion of a garage into a habitable room including asso…
202835HH
2020 Refused
Ground Floor Flat 15 Boston Gardens Boston Road Hanwell London W7 2AN
Conversion of existing ground floor flat into 2 self-contained residential units; rear do…
203032FUL
2020 Approved
2 Boston Gardens Boston Road Hanwell London W7 2AN
Alteration of roof from hip to gable end; rear roof extension incorporating a Juliet balc…
202623HH
2020 Approved
34 Southdown Avenue Hanwell London W7 2AQ
Single storey side and rear extensions; and front porch extension (following demolition o…
202425HH
2018 Withdrawn
15 Boston Gardens Boston Road Hanwell W7 2AN
Conversion of property into three self-contained flats; and use of existing outbuilding f…
179024FUL
2020 Approved
2 Boston Gardens Boston Road Hanwell London W7 2AN
Single storey rear extension (Max 6m deep and Max 4m high) (following demolition of singl…
201632PALHE
2016 Withdrawn
Public Telephone Outside 23 Boston Parade Boston Road Hanwell London W7 2DG
Installation of one internally illuminated digital panel as integral part of telephone ki…
163412ADV
2016 Approved
33 Southdown Avenue Hanwell London W7 2AG
Single storey rear extension
162532HH
2016 Approved
31 Southdown Avenue Hanwell London W7 2AG
Single storey rear infill extension
161021HH
2016 Approved
32 Southdown Avenue Hanwell London W7 2AQ
Single storey side/rear extension. (following demolition of existing single storey rear e…
160121HH
2016 Approved
32 Southdown Avenue Hanwell London W7 2AQ
Alteration of roof from hip to gable end; rear roof extension incorporating a juliet balc…
160119CPL
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