21 Carlyle Square, London, SW3 6EY Data via plota.co.uk

PP/25/06108 - Planning Permission Approved
Extensions & alterationsListed buildings

Proposal

Replacement of rear ground floor windows to doors; rear door replacement; raised rear balcony balustrade; insertion of front lightwell railing and gate; replacement side access gate; basement window grilles; and new Crittall-style replacement windows. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
13 Oct 2025
✓
Approved
12 Mar 2026

Approved on 12 Mar 2026 · Last checked 23 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 10

Chelsea Park/Carlyle 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 - No 100 · Article 4 - No 58. Named permitted development rights are withdrawn here.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.
Tree preservation order
Consent is needed before work on protected trees.
Not every council has published its orders as open data, so no order shown is not proof there is none.
Protected view corridor: 9A.1 King Henry's Mound to St Paul's Cathedral
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.
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 ↗
Air quality management area: Kensington and Chelsea 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 390 m away: Thames Tideway Tunnel
The site is 390 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, 853 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 ↗
16 listed buildings within 150 m
Nearest: 40, Chelsea Square Sw3, Grade II*, 18 m away · 3 Grade II*, 13 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 16 with distances
Historic England ↗
Also on the record
Inside the Kensington and Chelsea built-up area; Public transport access: PTAL 4 (good), TfL 2023, for the 100 m square; Designated open space 26 m away.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 3 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.

Sales history 2

Last sold for £20,000,000 in August 2025. Terraced house, freehold.

15 August 2025£20,000,000
30 November 2010£13,600,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area543 m² (5,845 sq ft)
Energy ratingD (57 out of 100), could reach C
PropertySemi-detached house, 12 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in February 2023, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Kensington and Chelsea
Application type
Planning Permission
Postcode
SW3 6EY
Received
13 Oct 2025
Validated
13 Oct 2025
Ward
Stanley
Case officer
Show
Target decision
8 Dec 2025
Decision
Granted
Decision date
12 Mar 2026
Applicant
Show

How this decision compares

Decided in 150 days from validation, 72 days slower than Kensington and Chelsea's median of 78 for extensions. Approved, as 95% of extensions here are.

35%decided within 8 weeks
95%approved
1,595decided in the last year

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

Consultation & key dates

Comments by
14 Nov 2025

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

2025 Approved
Replacement of existing timber windows for double glazed timber windows, without any chan…
CL/25/06114
2023 Approved
Excavation of new basement storey below footprint of existing dwelling, extending partial…
PP/23/02668
2019 Approved
Prune 1 x Oak
ARB/19/02100
2019 Approved
Prune 1 x Ash (rear)
ARB/19/02019
Within ~100m

Nearby activity

2025 Approved
38 Chelsea Square, London, SW3 6LH
Variation of condition 2 (approved drawings) of planning permission 23/08025 to allow rem…
PP/25/05633
2025 Approved
64 Old Church Street, London, SW3 6EP
Strip out of kitchen joinery (set aside), non-original plasterboard wall and ground and f…
LB/25/05747
2025 Approved
20 Carlyle Square, London, SW3 6EY
Prune 1x Magnolia (Magnolia spp) at front
ARB/25/05967
2025 Approved
80 Old Church Street, London, SW3 6EP
Basement extension with front and rear lightwells with railing surrounds; conversion of g…
PP/25/04327
2025
21A Carlyle Square, London, SW3 6EY
Removal of condition 2 (use of roof as terrace precluded) and variation of condition 1 (a…
PP/25/05635
2025 Approved
18 Carlyle Square, London, SW3 6EX
Proposed conservatory to rear elevation at ground floor level, in conjunction with previo…
PP/25/03204
2025 Approved
22 Carlyle Square, London, SW3 6EY
Prune 1 x Magnolia (front)
ARB/25/02868
2024 Approved
26 Carlyle Square, LONDON, SW3 6EY
Prune 1 x Silver Birch (front)
ARB/24/07519
2023 Approved
117 Old Church Street, LONDON, SW3 6EA
FELL (as specified)
ARB/23/07518
2023 Withdrawn
80 Old Church Street, London, SW3 6EP
Extension at ground floor, extension at basement level, conversion of one of two garages…
PP/23/05631
2023 Approved
22 Carlyle Square, London, SW3 6EY
Prune 1 x Magnolia (front)
ARB/23/06467
2023 Approved
117 Old Church Street, London, SW3 6EA
Replacement of non-original rear extension; construction of basement below replacement ex…
PP/23/03303
2023 Approved
117 Old Church Street, London, SW3 6EA
Replacement of non-original rear extension; construction of basement below replacement ex…
LB/23/03304
2023 Approved
131 Old Church Street, London, SW3 6EB
Prune 1x Lime at front
ARB/23/04091
2023 Approved
133 Old Church Street, London, SW3 6EB
Prune 1x Liquidambar at front
ARB/23/04092
2023 Approved
64 Old Church Street, London, SW3 6EP
Removal of existing right garage door and installation of replacement garage door.
LB/23/03494
2023 Approved
23 Carlyle Square, London, SW3 6EY
Construction of single storey basement below the building footprint, with lightwells to t…
PP/23/03096
2023 Refused
38 Chelsea Square, London, SW3 6LH
Erection of a 3 storey rear extension, alterations to fenestration, lowering of lower gro…
PP/23/02489
2022 Approved
22 Carlyle Square, LONDON, SW3 6EY
Prune 1x Magnolia x soulangeana and 1x Ficus Brown Turkey at front
ARB/22/05639
2022 Approved
25 Carlyle Square, LONDON, SW3 6EY
Erection of porch canopy over front door.
PP/22/03423
2017 Approved
22 Carlyle Square, LONDON, SW3 6EY
Prune 1 x Magnolia tree (front)
ARB/17/07728
2017 Refused
26 Carlyle Square, LONDON, SW3 6EY
Variation of condition 8(e) (Detailed drawings of garage door) of planning permission 12/…
PP/17/05927
2017 Approved
26 Carlyle Square, LONDON, SW3 6EY
Variation of condition 2 (compliance with approved drawings) of planning permission 12/04…
PP/17/05933
2017 Approved
19 Carlyle Square, LONDON, SW3 6EY
Prune 1 x Magnolia (rear)
ARB/17/05341
2017 Approved
29 Chelsea Square, LONDON, SW3 6LQ
Re-positioning of 3 windows and addition of 1 window on street elevation.
PP/17/03245
Kensington and Chelsea
Planning Authority Score
5.1/10
Average
#144 of 296 councils
Relevant to this application:
Householder decisions

Kensington and Chelsea ranks #174 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Kensington and Chelsea decision statistics
Based on MHCLG data, the nine months to December 2025
93%
Overall approval rate
Above avg (87%) #58 of 296
94%
Householder approved
Above avg (90%) #110 of 296
61%
Decided in 8 weeks
Below avg (63%) #174 of 296
40%
Extended time limit
Below avg (41%) #152 of 296
94%
Minor dwellings approved
455 decided (1-9 homes)
87%
Change of use approved
53 decided
1,839
Total decisions
135 refused in the nine months to December 2025
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

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.