Flat 1, 23 Onslow Square, London, SW7 3NJ Data via plota.co.uk

LB/25/04314 - Listed Building Consent Approved

Proposal

Replacement of 3no. sets of French doors at first floor front elevation with replica doors with slimline, double-glazed units. Modification of sidelights and overlights to accommodate slimline double glazing. (Retrospective application) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
10 Jul 2025
✓
Approved
4 Sept 2025

Approved on 4 Sept 2025 · Last checked 24 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 10

16 listed buildings within 150 m of the postcode pin
Nearest: 9-25, Onslow Square, Grade II, the postcode pin is inside its outline · 4 Grade II*, 12 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 ↗
Thurloe/Smith's Charity 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 - No 100. Named permitted development rights are withdrawn here.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.
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 about 972 m away: Thames Tideway Tunnel
The site is about 972 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, about 261 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 ↗
Also on the record
Inside the Kensington and Chelsea built-up area; Public transport access: PTAL 6a (excellent), TfL 2023, for the 100 m square; Designated open space about 25 m away; Town centre about 85 m away: South Kensington.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 1 November 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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 £1,050,000 in February 2004. Flat or maisonette, leasehold.

27 February 2004£1,050,000
29 April 1998£620,000

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

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Other new applications on this street

19 Aug 2026Approved

Flat 8, 5 Onslow Square, London, SW7 3NJ

Internal alterations and replacement of windows on the front and rear elevations...

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27 Oct 2026Pending

Flat 3, 55 Onslow Square, London, SW7 3LR

Details required by Condition 3, Part B, Limb L (Submission of details) of Liste...

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28 Sept 2026Pending

Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

Details required by condition 3 Part B - Limb C (submission of details) of liste...

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17 Sept 2026Pending

Flat 5, 51 Onslow Square, London, SW7 3LR

Renovation of timber windows on front elevation, replacing glass with double gla...

PP/26/04979

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First And Second Floor Flat, 100 Old Brompton Road, London, SW7 3RD

Alterations to existing flat at first and second floor levels involving addition...

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2 Nov 2026Pending

Flat 22, Clareville Court, Clareville Grove, London, SW7 5AT

Alterations to fifth floor terrace of Flat 22, including new terrace doors, rail...

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17-19 Pelham Place, London, SW7 2NQ

Prune 1 x Fig (rear) and 1 x Common Crab Apple (front)

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Important details

Council
Kensington and Chelsea
Application type
Listed Building Consent
Postcode
SW7 3NJ
Received
10 Jul 2025
Validated
10 Jul 2025
Ward
Brompton and Hans Town
Case officer
Show
Target decision
4 Sept 2025
Decision
Granted
Decision date
4 Sept 2025
Applicant
Show
Leaseholder
Show

How this decision compares

Decided in 56 days from validation, 28 days faster than Kensington and Chelsea's median of 84 for listed building consent. Approved, as 95% of listed building consent here are.

28%decided within 8 weeks
95%approved
549decided in the last year

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

Consultation & key dates

Comments by
15 Aug 2025

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Replacement of 3no. sets of French doors at first floor front elevation with replica door…
PP/25/04313
2020 Approved
Details required by Condition 2 (Submission of details) of Listed Building Consent |LB/19…
CON/20/02187
2019 Approved
Internal alterations including refurbishment of master bathroom.
LB/19/08215
2019 Approved
Installation of satellite dish on the roof.
LB/19/08229
2019 Approved
Installation of satellite dish on the roof.
PP/19/08228
Within ~100m

Nearby activity

2025 Approved
27 Pelham Place, London, SW7 2NQ
Prune 1 x Sycamore (front)
ARB/25/04658
2025 Approved
1 Pelham Place, London, SW7 2NQ
Prune 1 x Cherry (front)
ARB/25/03484
2025 Approved
Flat 10, 25 Onslow Square, London, SW7 3NJ
Like for like replacement of three rear-facing windows and one side elevation metal windo…
LB/25/02491
2025 Approved
Flat 10, 25 Onslow Square, London, SW7 3NJ
Internal alterations including replacement of existing floor finishes and refurbishing tw…
LB/25/02361
2025 Withdrawn
On highway outside, 7 Old Brompton Road, London, SW7 3HZ
Removal of an existing InLink Unit, and the deployment of a replacement Street Hub 3 unit…
PP/25/02161
2025 Withdrawn
On highway outside, 7 Old Brompton Road, London, SW7 3HZ
Removal of an existing InLink Unit, and the deployment of a replacement Street Hub 3 unit…
CA/25/02162
2025 Approved
Flat 16, 27 Onslow Square, London, SW7 3NH
Interior refurbishment; reconfiguration of layout; and replacement of single glazed metal…
PP/25/00115
2024 Approved
16 Pelham Street, London, SW7 2NG
Lowering of lower ground floor level and landscaping works to reveal lower ground floor…
PP/24/06807
2024 Withdrawn
2 Onslow Square, London, SW7 3NP
Creation of second shower room at first floor level. Installation of cornice in reception…
LB/24/07664
2024 Approved
17-19 Pelham Place, LONDON, SW7 2NQ
Proposed enhancement of rear garden hard and soft landscaped areas including erection of…
LB/24/06155
2024 Approved
17-19 Pelham Place, LONDON, SW7 2NQ
Proposed enhancement of rear garden hard and soft landscaped areas including erection of…
PP/24/06154
2024 Decided
17-19 Pelham Place, LONDON, SW7 2NQ
Prune 2 x Apple (front)
ARB/24/06435
2024 Approved
19 Onslow Square, LONDON, SW7 3NJ
Installation of two fire rated doors in basement communal hallway.
LB/24/06173
2023 Approved
Park House, Onslow Square, LONDON, SW7 2NG
Variation of condition 1 (compliance with approved drawings) of planning permission 21/01…
PP/23/06707
2024 Withdrawn
Flat 1, 17 Onslow Square, LONDON, SW7 3NJ
Installation of heat pump at rear of building.
PP/24/04819
2024 Withdrawn
Flat 1, 17 Onslow Square, LONDON, SW7 3NJ
Installation of heat pump at rear of building.
LB/24/04820
2024 Refused
17-19 Pelham Place, LONDON, SW7 2NQ
FELL 2 x Crab Apple (front)
ARB/24/04958
2024 Approved
27 Pelham Place, LONDON, SW7 2NQ
Prune 1 x Sycamore (front)
ARB/24/04642
2024 Approved
18 Pelham Crescent, LONDON, SW7 2NR
Replacement of non-original windows to front elevation at lower ground and third floor, w…
LB/24/03516
2024 Approved
17-19 Pelham Place, LONDON, SW7 2NQ
Construction of single level basement (including swimming pool) beneath part of non-origi…
PP/24/02868
2021
Pelham Cottage, Pelham Street, LONDON, SW7 2NG
Fell 3 x Birch (front)
ARB/21/02298
2021 Withdrawn
Park House, Onslow Square, LONDON, SW7 2NG
Variation of Condition 2 (Compliance with approved drawings) of planning permission PP/18…
PP/21/01500
2020 Withdrawn
Park House, Onslow Square, LONDON, SW7 2NG
Fell and prune (as specified)***WITHDRAWN***
ARB/20/02227
2020 Approved
Park Cottage, 7-11 Onslow Square, LONDON, SW7 3NJ
Prune 2 x Sycamore
ARB/20/06212
2020 Approved
Flat 1, 5 Onslow Square, LONDON, SW7 3NJ
Prune 1 x Holly
ARB/20/06213
Kensington and Chelsea
Planning Authority Score
5.1/10
Average
#144 of 296 councils
Relevant to this application:
Other 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.

Leaseholders: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.