Flat 4, 51 Onslow Square, London, SW7 3LR Data via plota.co.uk

Approved LB/26/02270
Extensions & alterations
Council
Kensington and Chelsea 5.1/10
Date received
16 Jun 2026
Date validated
16 Jun 2026
Decision date
6 Aug 2026
Postcode
SW7 3LR

Description

Internal alterations to existing bathrooms, creation of a laundry room and associated alterations. Data via plota.co.uk

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Last checked

How this decision compares

Decided in 51 days from validation, 32 days faster than Kensington and Chelsea's median of 83 for extensions. Approved, as 96% of extensions here are.

33%decided within 8 weeks
96%approved
1,421decided 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 →

Site constraints 8

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 Named permitted development rights are withdrawn here.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 ↗
Also on the record
9 listed buildings within 150 m; Inside the Kensington and Chelsea built-up area; Designated open space 24 m away; Town centre 31 m away: South Kensington.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 25 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.

Sales history 3

Last sold for £2,425,000 in February 2026. Flat or maisonette, leasehold.

24 February 2026£2,425,000
22 May 2009£2,300,000
16 March 2007£2,200,000

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

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Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

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2025 Approved
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2025 Approved
Flat 3, 23 Sumner Place, London, SW7 3EG
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2025 Approved
Flat 3, 23 Sumner Place, London, SW7 3EG
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PP/25/03229
2025 Approved
Flat 1, 23 Onslow Square, London, SW7 3NJ
Replacement of 3no. sets of French doors at first floor front elevation with replica door…
PP/25/04313
2025 Approved
Flat 1, 23 Onslow Square, London, SW7 3NJ
Replacement of 3no. sets of French doors at first floor front elevation with replica door…
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2025 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
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2025 Approved
Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR
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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…
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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…
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75 Onslow Square, London, SW7 3LS
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2018 Approved
Flat 1, 61 Onslow Square, LONDON, SW7 3LS
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2018 Approved
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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