18 Eaton Mews South London SW1W 9HP Data via plota.co.uk

26/04236/FULL - Full Planning Permission Application Approved
Extensions & alterations

Proposal

Creation of roof terrace at main roof level, accessed via a sliding box access rooflight and enclosed by black painted metal railings set back from the rear roof edge; Installation of projecting balcony, with black painted vertical metal railings and a curved lead canopy to first floor front elevation; alterations to entrance door arrangement, bringing the door forward to align with the front elevation; and other associated works. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
26 Jun 2026
✓
Validated
29 Jun 2026
✓
Approved
25 Aug 2026

Approved on 25 Aug 2026 · Delegated Decision · Last checked 26 Aug 2026

Documents 15

Decision & officer reports 2

PDF GRANT OF FULL PP [PE] Decision Notice · 25 Aug 2026 View ↗ PDF DELEGATED REPORT Report · 25 Aug 2026 View ↗

Statements & assessments 1

PDF DA_STATEMENT_REVB Design and Access Statement · 29 Jun 2026 View ↗

Plans & drawings 3

PDF PROPOSED FRONT ELEVATION Drawing · 11 Aug 2026 View ↗ PDF LOCATION PLAN Location Plan · 26 Jun 2026 View ↗ PDF DRAWINGS_COMBINED Drawing · 26 Jun 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 26 Jun 2026 View ↗

Consultation & comments 1

PDF NEIGHBOUR NOTIFICATION LETTER (21D) Background Papers · 4 Jul 2026 View ↗

Other documents 7

PDF ACK-GENERAL LETTER (G/P/C) Background Papers · 4 Jul 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 4 Jul 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 4 Jul 2026 View ↗ PDF CNSLT-LA SOCIETY Background Papers · 4 Jul 2026 View ↗ PDF SITE NOTICE 21 OR 28 DAYS IF T&C APPL. Background Papers · 4 Jul 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 29 Jun 2026 View ↗ PDF SITELOCATION Background Papers · 26 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 7

Grade II listed: 1-13, Chester Square Sw1
List entry 1357284 · 30 m from the pin · 13 more listed buildings within 150 m (1 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 13 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.
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 ↗
Registered park or garden 43 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 ↗
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
Full Planning Permission Application
Postcode
SW1W 9HP
Received
26 Jun 2026
Validated
29 Jun 2026
Ward
Knightsbridge & Belgravia
Case officer
Show
Target decision
24 Aug 2026
Decision
Application Permitted
Decision date
25 Aug 2026
Decision level
Delegated Decision
Applicant
Show
Agent
Jobey Keene

How this decision compares

Decided in 57 days from validation, 4 days slower 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 →

Public comments

No public comments yet.

65 neighbours consulted · Last counted 26 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15036870
Site or press notice
15 Jul 2026
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

2016 Approved
Remove existing roof access hatch and replace with sliding rooflight and installation of…
16/01906/FULL
Within ~100m

Nearby activity

2025 Approved
77 Chester Square London SW1W 9DY
1 x London plane T1: Cut back selected branches to suitable branch junctions to provide u…
25/05160/TCA
2025
20 Eaton Square London SW1W 9DD
G1 13 X Silver Birch Trees: Crown Reduction by 3m to heights and cut back by 2m from the…
25/07175/TCA
2025 Approved
15 Eaton Square London SW1W 9DD
Replacement intercom system.
25/05392/LBC
2025 Approved
22 Eaton Square London SW1W 9DE
Replacement intercom system.
25/05394/LBC
2025 Approved
18 - 19 Eaton Square London SW1W 9DD
Replacement intercom system.
25/05393/LBC
2025 Approved
Trees In Eaton Square London SW1W 9DA
1 x London plane (T228): Remove large Massaria branch approximately 180mm diameter and 4…
25/06069/TPO
2025 Approved
10 Eaton Square London SW1W 9DB
Replacement intercom system.
25/04376/LBC
2025 Approved
9 Eaton Square London SW1W 9DB
Replacement intercom system.
25/04375/LBC
2025 Approved
8 Eaton Square London SW1W 9DB
Replacement intercom system.
25/04374/LBC
2025 Approved
16 Eaton Mews South London SW1W 9HP
Creation of a roof terrace with glazed access hatch, rooflights and railings and installa…
25/03034/FULL
2025
15 Eaton Square London SW1W 9DD
T782 - Prunus sp. (Cherry sp.): RAF - Reshape and rebalance crown - reducing the extensio…
25/01437/TCA
2025
79 Chester Square London SW1W 9DU
Addition of a glazed roof above the new rear light well, relocation of the living wall an…
25/01359/FULL
2025
79 Chester Square London SW1W 9DU
AdditionAddition of a glazed roof above the new rear light well, relocation of the living…
25/01311/LBC
2025
77 Chester Square London SW1W 9DY
Selective pruning of over hanging limbs on boundary with 76 Chester Square to provide max…
25/01225/TCA
2024
3 Chester Square Mews London SW1W 9DS
Remodelling of 3 Chester Square Mews comprising the provision of a basement beneath the b…
24/08101/LBC
2024
3 Chester Square Mews London SW1W 9DS
Remodelling of 3 Chester Square Mews comprising the provision of a basement beneath the b…
24/08100/FULL
2024
76 Chester Square London SW1W 9DU
External repair and maintenance, including replacement of tank house and dormers, introdu…
24/07271/LBC
2024
76 Chester Square London SW1W 9DU
External repair and maintenance, including replacement of tank house and introduction of…
24/07270/FULL
2024
3 Chester Square Mews London SW1W 9DS
Remodelling of building including excavation to create new beasement level; erection of m…
24/05904/LBC
2024
3 Chester Square Mews London SW1W 9DS
Remodelling of building including excavation to create new beasement level; erection of m…
24/05903/FULL
2021 Approved
14-17 Eaton Square London SW1W 9DD
Alterations to entrance door at 17 Eaton Square, including to glazing and decorative meta…
21/02443/LBC
2021 Approved
77 Chester Square London SW1W 9DY
1 x London plane (T1): Reduce crown to previous most previous recent reduction points, re…
21/02268/TCA
2021 Refused
53 Lower Belgrave Street London SW1W 0LP
Extension to closet wing at rear ground, first, second and third floor levels, alteration…
21/01390/LBC
2021 Refused
53 Lower Belgrave Street London SW1W 0LP
Extension to closet wing at rear ground, first, second and third floor levels and alterat…
21/01389/FULL
2021 Approved
2 Chester Square London SW1W 9HH
Variation of condition 1 of listed building consent dated 09 September 2020 (RN 20/02305/…
21/01492/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