Flat D 86 Eaton Square London SW1W 9AG Data via plota.co.uk

25/08586/FULL - Full Planning Permission Application Approved

Proposal

Subdivision of single flat into three flats and installation of rooftop AC condenser. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
24 Nov 2025
✓
Approved
22 May 2026

Approved on 22 May 2026 · Delegated Decision · Last checked 11 Oct 2026

Documents 40

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 22 May 2026 View ↗ PDF DELEGATED REPORT Report · 22 May 2026 View ↗

Statements & assessments 5

PDF BIODIVERSITY NET GAIN STATEMENT (EXEMPT) Background Papers · 24 Nov 2025 View ↗ PDF FIRE STATEMENT (EXEMPT) Background Papers · 24 Nov 2025 View ↗ PDF HERITAGE STATEMENT Heritage Statement · 24 Nov 2025 View ↗ PDF SUSTAINABLE DESIGN STATEMENT (EXEMPT) Background Papers · 24 Nov 2025 View ↗ PDF DESIGN AND ACCESS STATEMENT Design and Access Statement · 24 Nov 2025 View ↗

Plans & drawings 17

PDF SITE LOCATION PLAN Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-01 EXISTING GROUND FLOOR PLAN Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-02 EXISTING FRONT ELEVATION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-03 EXISTING REAR ELEVATION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-04 EXISTING SECTION A Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-05 EXISTING SECTION B Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-DEM01 GROUND FLOOR DEMOLITION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-DEM02 SECTION A DEMOLITION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-01-DEM03 SECTION B DEMOLITION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-02-01 PROPOSED GROUND FLOOR PLAN Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-02-02 PROPOSED FRONT ELEVATION (NO CHANGE) Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-02-03 PROPOSED REAR ELEVATION Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-02-04 PROPOSED SECTION A Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-02-05 PROPOSED SECTION B Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-10-01 ARCHITECTURAL DETAILING Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-22-01 PROPOSED GROUND FLOOR SKIRTING SCHEDULE Drawing · 24 Nov 2025 View ↗ PDF 2508-DR-35-01 PROPOSED GROUND FLOOR CORNICE SCHEDULE Drawing · 24 Nov 2025 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 24 Nov 2025 View ↗ PDF FEECALCULATION Background Papers · 24 Nov 2025 View ↗

Consultation & comments 3

PDF FIRE HEALTH AND SAFETY RESPONSE Consultee Comment · 17 Feb 2026 View ↗ PDF ECNSLT-STD EXT CONSULTEES Background Papers · 16 Feb 2026 View ↗ PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 16 Feb 2026 View ↗

Other documents 11

PDF ECNSLT-INTERNAL CONSULTS Background Papers · 16 Mar 2026 View ↗ PDF ECNSLT-INTERNAL CONSULTS Background Papers · 16 Mar 2026 View ↗ PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 16 Feb 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 16 Feb 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 16 Feb 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 16 Feb 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 16 Feb 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 14 Feb 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 24 Nov 2025 View ↗ PDF AC AND ACOUSTIC REPORT Background Papers · 24 Nov 2025 View ↗ PDF DAYLIGHT AND SUNLIGHT REPORT Background Papers · 24 Nov 2025 View ↗

All documents on the council site ↗

Associated applications 2

Site constraints 10

Grade II* listed: 83-102, Eaton Square Sw1
List entry 1356981 · The pin is inside its outline · 15 more listed buildings within 150 m (3 Grade II*, 12 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 15 with distances
Historic England ↗
Belgravia 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.
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 ↗
Registered park or garden 30 m away: The Grosvenor Estate: Eaton 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 ↗
National infrastructure project 575 m away: Thames Tideway Tunnel
The site is 575 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, the site is inside its boundary).
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 ↗
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; Priority habitat 29 m away: Deciduous woodland; Tree preservation order 29 m away: W10_A2.
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.

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
SW1W 9AG
Received
24 Nov 2025
Validated
24 Nov 2025
Ward
Knightsbridge & Belgravia
Case officer
Show
Target decision
22 May 2026
Decision
Application Permitted
Decision date
22 May 2026
Decision level
Delegated Decision
Applicant
Show
Agent
ROSS ALEXANDER LAMBIE ARCHITECTS LTD

How this decision compares

Decided in 179 days from validation, 103 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

No public comments yet.

26 neighbours consulted · Last counted 11 Oct 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-14367036
Planning Portal ref
PP-14367036
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 B 80 Eaton Square London SW1W 9AP
Replacement of steel and timber fenestration and steel-framed doors with painted timber…
25/05520/FULL
2025
90 Eaton Square London SW1W 9AG
T931 - ash - crown reduce by up to 1.5 meters in hight and 1 meter on the lateral branche…
25/07652/TCA
2025 Approved
52 Eaton Place London SW1X 8AL
Alterations to rear extension at first floor level including creation of rear roof terrac…
25/05109/LBC
2025 Approved
52 Eaton Place London SW1X 8AL
Alterations to rear extension at first floor level including creation of rear roof terrac…
25/05108/FULL
2025
Penthouse 95 Eaton Square London SW1W 9AQ
Revision of fenestration for each former Flat T bay to include three pairs of double slid…
25/03378/LBC
2025
Penthouse 95 Eaton Square London SW1W 9AQ
Variation of condition 1 of planning permission dated 16 April 2025 (RN: 24/06846/FULL) f…
25/03380/FULL
2025
Penthouse 95 Eaton Square London SW1W 9AQ
Replacement of two approved slimline double glazed sash windows with steel framed casemen…
25/03379/LBC
2025
Penthouse 95 Eaton Square London SW1W 9AQ
Variation of condition 1 of planning permission dated 16 April 2025 (RN: 24/06846/FULL) f…
25/03377/FULL
2025
33 Eaton Mews North London SW1X 8AS
Conversion of Garage into Habitable Space with associated change to fenestration to garag…
25/01876/FULL
2024
Top Flat Floor 59 Eaton Place London SW1X 8DF
Internal alterations to the third and fourth floors of Flat 3.
24/06546/LBC
2024
74C Eaton Place London SW1X 8AU
Internal and external alterations in connection with the adaptation of the roof to facili…
24/05176/LBC
2024
74C Eaton Place London SW1X 8AU
Internal and external alterations in connection with the adaptation of the roof to facili…
24/05175/FULL
2024
90 Eaton Square London SW1W 9AG
Structural repairs to the front pavement vaults.
24/05093/LBC
2024
Flat G 90 Eaton Square London SW1W 9AG
Alterations including removal of modern partitions, installation of new fabric and additi…
24/04245/LBC
2024
Flat G 90 Eaton Square London SW1W 9AG
Installation of one air conditioning unit at main roof level. (Linked with 24/04245/LBC)
24/04244/FULL
2024 Approved
Third Floor To Fourth Floor 76 Eaton Place London SW1X 8AU
Creation of terrace at main roof level with glazed access hatch.
24/01175/FULL
2024
93 Eaton Square London SW1W 9AQ
Installation of replacement lower ground floor timber sash windows with new like-for-like…
24/03986/FULL
2024
93 Eaton Square London SW1W 9AQ
Installation of replacement lower ground floor timber sash windows with new timber sash w…
24/03987/LBC
2024 Approved
8 Lyall Street London SW1X 8LH
Internal investigative works
24/02502/LBC
2024 Approved
95 Eaton Square London SW1W 9AQ
1 x Cherry (T1): Reduce crown by a maximum of 1m and remove any dead stubs and branches…
24/00913/TCA
2020 Approved
58 Eaton Place London SW1X 8AT
Roof repairs and partial replacement of structural timbers (retrospective application).
20/00632/LBC
2020 Approved
Flat F 80 Eaton Square London SW1W 9AP
Replacement of existing non original front terrace floor finish with a new tiles finish.
20/02060/FULL
2020 Approved
Flat F 80 Eaton Square London SW1W 9AP
Replacement of existing non original front terrace floor finish with a new tiles finish.
20/02061/LBC
2020 Approved
Third Floor And Fourth Floor Flat 84 Eaton Square London SW1W 9AG
External alterations, including replacement of roof terrace covering, application of liqu…
20/01644/LBC
2020 Approved
Third Floor And Fourth Floor Flat 84 Eaton Square London SW1W 9AG
External alterations, including replacement of roof terrace covering, application of liqu…
20/01643/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