57 Eaton Square London SW1W 9BG Data via plota.co.uk

26/03176/NMA - Non-material amendments Approved
Extensions & alterations

Proposal

Amendments to planning permission dated 4th August 2014 (RN:) for Amalgamation of 2 x 2 bed flats on lower ground and ground floor levels to create a 3 bed maisonette; installation of an external metal spiral staircase on the rear elevation to access the garden from ground floor level, and alterations to rear windows (site includes Flats 57 and 58a). Namely, amendments to rear steel staircase, minor internal wall alterations. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
14 May 2026
✓
Validated
18 May 2026
✓
Approved
5 Jun 2026

Approved on 5 Jun 2026 · Delegated Decision · Last checked 7 Jul 2026

Documents 14

Decision & officer reports 2

PDF GRANT NON MATERIAL AMENDMENT Decision Notice · 5 Jun 2026 View ↗ PDF DELEGATED REPORT Report · 5 Jun 2026 View ↗

Plans & drawings 5

PDF EXISTING FLOOR PLANS Drawing · 14 May 2026 View ↗ PDF DEMOLITION _ RENOVATION PLANS Drawing · 14 May 2026 View ↗ PDF PROPOSED LGF RENOVATION PLAN Drawing · 14 May 2026 View ↗ PDF PROPOSED GF RENOVATION PLAN Drawing · 14 May 2026 View ↗ PDF REAR ELEVATION Drawing · 14 May 2026 View ↗

Application forms 2

PDF APPLICATIONFORMREDACTED Application Form · 14 May 2026 View ↗ PDF FEECALCULATION Background Papers · 14 May 2026 View ↗

Other documents 5

PDF 3RD INVALID LETTER Background Papers · 5 Jun 2026 View ↗ PDF ACK - NON-MATERIAL AMENDMENT Background Papers · 4 Jun 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 18 May 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 18 May 2026 View ↗ PDF ATTACHMENTSUMMARY Background Papers · 14 May 2026 View ↗

All documents on the council site ↗

Site constraints 5

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 Named permitted development rights are withdrawn here.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.
Archaeological priority area: City of Westminster APA 3.2
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 ↗
Also on the record
Inside the City of Westminster built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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
SW1W 9BG
Received
14 May 2026
Validated
18 May 2026
Ward
Knightsbridge & Belgravia
Case officer
Show
Target decision
15 Jun 2026
Decision
Application Permitted
Decision date
5 Jun 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Brahma.London

How this decision compares

Decided in 18 days from validation, 35 days faster than Westminster's median of 53 for extensions. Approved, as 87% of extensions here are.

62%decided within 8 weeks
87%approved
930decided in the last year

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

Consultation & key dates

Alt. reference
PP-14900860
Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2024
T1 Magnolia Reduce and re-shape by up to 1m all round.Thin branch ends to create an even…
24/03638/TCA
2024
Replacement Portico Steps. (Linked with 24/03345/FULL)
24/03346/LBC
2024
Replacement Portico Steps. (Linked with 24/03346/LBC)
24/03345/FULL
2018 Approved
Internal works to communal areas over all floors including alterations to existing servic…
18/05180/LBC
Within ~100m

Nearby activity

2025
45 Eaton Terrace London SW1W 8TR
Installation of three discreet CCTV cameras (front door, lightwell and rear mews); instal…
25/07818/FULL
2025
45 Eaton Terrace London SW1W 8TR
Installation of three discreet CCTV cameras (front door, lightwell and rear mews); instal…
25/07819/LBC
2025 Approved
Flat G 54 Eaton Square London SW1W 9BE
Installation of secondary glazing to the front three living/ dining room windows at third…
25/06174/LBC
2025
41 Eaton Terrace London SW1W 8TP
Installation of a retractable canvas awning to the rear elevation at ground floor level.
25/07118/LBC
2025
48 Eaton Square London SW1W 9BD
T862 - Magnolia grandiflora: Prune from adjacent structure - to clear the building wall b…
25/07054/TCA
2025
41 Eaton Terrace London SW1W 8TP
Installation of a retractable canvas awning to the rear elevation at ground floor level.
25/07034/FULL
2025
54 Eaton Square London SW1W 9BE
Replacement doors and Windows
25/06993/LBC
2025
54 Eaton Square London SW1W 9BE
Replacement timber doors and windows to rear first floor level (Flat B). (Linked 25/06993…
25/06992/FULL
2025 Approved
53 Eaton Terrace London SW1W 8TR
Retention of air conditioning unit to roof.
25/05233/FULL
2025 Approved
53 Eaton Terrace London SW1W 8TR
Retention of air conditioning unit on roof.
25/05216/LBC
2025
49 Eaton Square London SW1W 9BD
Refurbishment and upgrading of interiors to enhance its spatial functionality, modernisin…
25/06835/LBC
2025 Approved
58 Eaton Mews West London SW1W 9ET
T1 Palm tree: Fell to ground and treat stump.
25/05654/TCA
2025 Approved
81A Elizabeth Street London SW1W 9PG
Installation of an air conditioning unit at roof level and internal units in the second a…
25/04263/LBC
2025 Approved
81A Elizabeth Street London SW1W 9PG
Installation of an air conditioning unit at roof level.
25/04262/FULL
2025 Approved
41 Eaton Terrace London SW1W 8TP
Internal alterations at second floor level to subdivide existing bedroom into two.
25/04925/LBC
2025 Approved
13 Chester Row London SW1W 9JF
Installation of scaffold fixings, removal of defective stucco render, localised masonry r…
25/01922/LBC
2024
53 Eaton Terrace London SW1W 8TR
Variation of condition 1 and removal of condition 3 of planning permission dated 23 Octob…
24/09077/FULL
2024
1B Chester Row London SW1W 9JF
Erection of a rear extension at upper first floor to add an additional bedroom, alteratio…
24/08272/FULL
2024
16 Chester Row London SW1W 9JH
Bay laurel (T6) - Prune western crown up to 1.5m branch lengths to give clearance of subj…
24/07595/TCA
2024
10 Chester Row London SW1W 9JH
T1 English oak - Crown reduce height and spread 3-3.5m branch lengths pruning to establis…
24/07591/TCA
2021 Approved
67 Eaton Square London SW1W 9AR
Replacement of two existing mirrors in the hallway with a large central mirror, addition…
21/03321/LBC
2021 Approved
50A Eaton Square London SW1W 9BE
Reinstatement of three window openings and installation of new windows; removal of door c…
21/02701/FULL
2021 Approved
43 Eaton Terrace London SW1W 8TR
Variation of Condition 1 and 3 of listed building consent dated 07 May 2019 (RN: 19/00110…
21/00274/LBC
2021 Approved
43 Eaton Terrace London SW1W 8TR
Variation of Condition 1 and 4 and removal of Condition 10 of planning permission dated 1…
21/00245/FULL
2021 Approved
13A South Eaton Place London SW1W 9ER
Replacement of a staircase for a simplified traditional staircase, and installation of se…
21/00213/LBC
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