Basement To First Floor Flat, 75 Onslow Square, London, SW7 3LS Data via plota.co.uk

PP/25/05426 - Planning Permission Approved

Proposal

Replacement of windows and doors with slimline glazing to front, side and rear elevations to match existing. New traditional sash windows and doors to rear terrace. Internal alterations at lower ground, ground and first floor levels. Replacement of non-original internal doors. Removal of non-original finish to floors and stairs. New paving to rear garden and terrace. Data via plota.co.uk

Track application Save this application and get an email when its status or decision changes. Alerts nearby Get email alerts for new planning applications near this address.
View original council record ↗Last checked

Application progress

✓
Received
22 Sept 2025
✓
Approved
17 Nov 2025

Approved on 17 Nov 2025 · Last checked 23 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 10

14 listed buildings within 150 m of the postcode pin
Nearest: 41-75, Onslow Square Sw7, Grade II, the postcode pin is inside its outline · 1 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 14 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 Named permitted development rights are withdrawn here.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 892 m away: Thames Tideway Tunnel
The site is about 892 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 297 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 6b (excellent), TfL 2023, for the 100 m square; Designated open space about 30 m away; Town centre about 73 m away: South Kensington.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 2 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.

Work with planning data?

Every application in Kensington and Chelsea - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Other new applications on this street

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...

CON/26/05795
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...

CON/26/05176
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
19 Aug 2026Approved

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

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

PP/26/04397

Nearby new applications

3 Nov 2026Pending

South Kensington Underground Station, Pelham Street, London, SW7 2ND

Installation of enclosure supported on new concrete plinth, and extension of con...

LB/26/05590
3 Nov 2026Pending

24 Queen's Gate Gardens, London, SW7 5RP

External repair and conservation works, comprising: retention and completion of ...

LB/26/05755
3 Nov 2026Pending

24 Queen's Gate Gardens, London, SW7 5RP

External repair and conservation works, comprising: retention and completion of ...

PP/26/05753
2 Nov 2026Pending

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

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

PP/26/05882
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...

PP/26/05811
2 Nov 2026Pending

17-19 Pelham Place, London, SW7 2NQ

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

ARB/26/05883

Important details

Council
Kensington and Chelsea
Application type
Planning Permission
Postcode
SW7 3LS
Received
22 Sept 2025
Validated
22 Sept 2025
Ward
Courtfield
Case officer
Show
Target decision
17 Nov 2025
Decision
Granted
Decision date
17 Nov 2025
Applicant
Show

How this decision compares

Decided in 56 days from validation, 22 days faster than Kensington and Chelsea's median of 78 for full applications. Approved, as 94% of full applications here are.

36%decided within 8 weeks
94%approved
1,540decided in the last year

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

Consultation & key dates

Comments by
17 Oct 2025

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

2025 Approved
Replacement of windows and doors with slimline glazing to front, side and rear elevations…
LB/25/05427
Within ~100m

Nearby activity

2025 Approved
4 Sumner Place, London, SW7 3EE
Replacement of consented kitchen with upgraded units - no change to layout - in keeping w…
LB/25/05977
2025 Approved
23 Sumner Place, London, SW7 3EG
Provision of condenser unit within acoustic enclosure at rear lower ground floor lightwel…
PP/25/06076
2025 Approved
23 Sumner Place, London, SW7 3EG
Provision of condenser unit within acoustic enclosure at rear lower ground floor lightwel…
LB/25/06077
2025
4 Sumner Place, London, SW7 3EE
Internal alterations comprising the replacement of modern bathroom fittings and sanitary…
LB/25/06350
2025 Approved
Flat 3, 23 Sumner Place, London, SW7 3EG
Internal alterations and replacement of single glazed casement window on rear elevation w…
LB/25/03230
2025 Approved
Flat 3, 23 Sumner Place, London, SW7 3EG
Internal alterations and replacement of single glazed casement window on rear elevation w…
PP/25/03229
2025 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
Part demolition to allow erection of orangery, lower ground rear extension, introduction…
PP/25/02621
2025 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
Part demolition to allow erection of orangery, lower ground rear extension, introduction…
LB/25/02622
2025 Approved
10 Sumner Place, London, SW7 3EE
Installation of 8no. microgeneration solar photovoltaic panels at roof level.
LB/25/03313
2024 Approved
Flat 8, 89 Onslow Square, London, SW7 3LT
Strip out entire property for a full refurbishment to include blocking up one entrance in…
LB/24/07376
2024 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
Part demolition to allow erection of orangery, lower ground rear extension and internal w…
LB/24/06636
2024 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
Part demolition to allow erection of orangery, lower ground rear extension and internal w…
PP/24/06635
2024 Approved
75 Onslow Square, London, SW7 3LS
Relocation of basement substation to a series of adjacent vaults
LB/24/06473
2024 Approved
75 Onslow Square, London, SW7 3LS
Relocation of basement substation to a series of adjacent vaults
PP/24/06472
2025 Approved
7 Sumner Place, London, SW7 3EE
Prune 1 x London Plane (Rear Garden)
ARB/25/01181
2024 Approved
59-75 Onslow Square, London, SW7 3LR
Roof replacement for like for like along north western terrace of 59-75 Onslow Square
PP/24/05288
2024 Approved
59-75 Onslow Square, London, SW7 3LR
Roof replacement for like for like along north western terrace of 59-75 Onslow Square
LB/24/05289
2024 Approved
93 Onslow Square, London, SW7 3LU
Enlarged opening between sitting room and kitchen. Blocking separate entrance from hall t…
LB/24/07419
2024 Approved
Flat 8, 61 Onslow Square, LONDON, SW7 3LS
Replacement of 2 external doors
PP/24/05850
2024 Approved
Flat 2, 69 Onslow Square, LONDON, SW7 3LS
Internal cosmetic alterations, replace flooring finishes internally and to terrace, along…
LB/24/04916
2017 Approved
Flat 2, 89 Onslow Square, LONDON, SW7 3LT
Internal alteration to ground floor flat involving part removal of timber stud partition…
LB/17/03374
2017 Approved
63 Onslow Square, LONDON, SW7 3LS
Internal alterations to ground floor flat.
LB/17/02719
2017 Approved
63 Onslow Square, LONDON, SW7 3LS
Works to rear of ground floor dwelling involving provision of replacement and additional…
LB/17/02764
2017 Approved
63 Onslow Square, LONDON, SW7 3LS
Works to rear of ground floor dwelling involving provision of replacement and additional…
PP/17/02763
2017 Approved
52 Onslow Square, LONDON, SW7 3NX
Interior common parts refurbishment including replacement of lift car and retention of gl…
LB/17/02667
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