Flat 8, 20 Onslow Square, London, SW7 3NP Data via plota.co.uk

PP/26/03137 - Planning Permission Approved
Extensions & alterationsUtility infrastructure

Proposal

General refurbishment of flat, minimal layout and non-original fabric changes, replacement of windows and installation of an AC condenser on existing terrace. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
12 Jun 2026
✓
Approved
11 Aug 2026

Approved on 11 Aug 2026 · Last checked 20 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 10

20 listed buildings within 150 m of the postcode pin
Nearest: 2-42, Onslow Square Sw7, Grade II, the postcode pin is inside its outline · 2 Grade II*, 18 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 20 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 Named permitted development rights are withdrawn here.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 845 m away: Thames Tideway Tunnel
The site is about 845 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 379 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 31 m away; Town centre about 48 m away: Brompton Cross.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 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 1

Last sold for £2,280,000 in December 2025. Flat or maisonette, leasehold.

23 December 2025£2,280,000

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

Building

Floor area110 m² (1,184 sq ft)
Energy ratingE (48 out of 100), could reach C
PropertyMid-terrace flat, 3 habitable rooms
BuiltBefore 1900
HeatingCommunity scheme
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in December 2022, 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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Other new applications on this street

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Important details

Council
Kensington and Chelsea
Application type
Planning Permission
Postcode
SW7 3NP
Received
12 Jun 2026
Validated
12 Jun 2026
Ward
Courtfield
Case officer
Show
Target decision
7 Aug 2026
Decision
Granted
Decision date
11 Aug 2026
Applicant
Show

How this decision compares

Decided in 60 days from validation, 23 days faster than Kensington and Chelsea's median of 83 for extensions. Approved, as 95% of extensions here are.

33%decided within 8 weeks
95%approved
1,441decided 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
10 Jul 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Withdrawn
2 Sydney Place, London, SW7 3NN
***Withdrawn***Replacement of vehicular gate to rear of property and erection of car port
LB/25/05508
2025 Withdrawn
2 Sydney Place, London, SW7 3NN
***Withdrawn***Replacement of hardstanding with natural stone and erection of single stor…
LB/25/05512
2025 Withdrawn
2 Sydney Place, London, SW7 3NN
***Withdrawn***Replacement of vehicular gate to rear of property and erection of car port
PP/25/05507
2025 Withdrawn
2 Sydney Place, London, SW7 3NN
***Withdrawn***Replacement of hardstanding with natural stone and erection of single stor…
PP/25/05511
2025 Approved
Flat 12, Avenue Studios, Sydney Close, London, SW3 6HW
Prune 1x Mimosa overhanging 12 Sydney Close
ARB/25/03942
2025 Approved
2 Sydney Place, London, SW7 3NN
Prune 1 x Tree of heaven (front)
ARB/25/02857
2025 Approved
33 Sumner Place, London, SW7 3NT
Refurbishment of windows and casement doors at front and rear elevations
LB/25/00739
2025 Approved
33 Sumner Place, London, SW7 3NT
Refurbishment of windows and casement doors at front and rear elevations
PP/25/00738
2025 Approved
Flat 7, 32 Onslow Square, London, SW7 3NS
Variation of condition 2 (compliance with approved drawings) of listed building consent 2…
LB/25/00319
2025 Approved
Flat 7, 32 Onslow Square, London, SW7 3NS
Variation of condition 2 (compliance with approved drawings) of planning permission 24/01…
PP/25/00301
2025 Approved
Flat 2B, Avenue Studios, Sydney Close, London, SW3 6HW
Replacement of four mezzanine level windows and one skylight
LB/25/01247
2025 Approved
Flat 2B, Avenue Studios, Sydney Close, London, SW3 6HW
Replacement of four mezzanine level windows and one skylight
PP/25/01246
2025 Approved
33 Sumner Place, London, SW7 3NT
Replacement rear steps; alterations to rear extension including new windows and roof ligh…
LB/25/00670
2024 Approved
Flat 2B, Avenue Studios, Sydney Close, London, SW3 6HW
Internal alterations including alterations to existing mezzanine floor and associated int…
LB/24/08572
2025 Approved
2 Onslow Square, LONDON, SW7 3NP
Replacing the large bathroom with a smaller bathroom and shower; removal of a non-origina…
LB/25/00282
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
Flat 7, 32 Onslow Square, London, SW7 3NS
Installation of new kitchen, bathrooms, flooring, acoustic floor and M&E, openings to eit…
LB/24/07746
2024 Approved
2-42 Onslow Square, LONDON, SW7 3NP
Prune 1 x Catalpa bignonioides (Indian Bean Tree) rear of 18 Onslow Square
ARB/24/05608
2024 Approved
33 Sumner Place, LONDON, SW7 3NT
Replacement rear steps; alterations to rear extension including new windows and roof ligh…
PP/24/05426
2024 Approved
33 Sumner Place, LONDON, SW7 3NT
Internal alterations including reconfiguration of lower ground floor and upper ground flo…
LB/24/03994
2018 Approved
Flat 3, 32 Onslow Square, London, SW7 3NS
Refurbishment and internal alterations to first floor flat, including insertion of air co…
PP/18/07623
2018 Withdrawn
Flat 1, 38 Onslow Square, LONDON, SW7 3NS
***WITHDRAWN*** Internal alterations including removal of non-historical walls and insert…
LB/18/06786
2018 Approved
52 Fulham Road, LONDON, SW3 6HH
Placement of 3 tables and 6 chairs on highway outside premises on an on-going basis. Plac…
PP/18/06954
2018 Approved
191-195 Fulham Road, LONDON, SW3 6JL
Installation of three awnings over shopfront windows and main entrance, including non-ill…
CA/18/05222
2018 Approved
191-195 Fulham Road, LONDON, SW3 6JL
Installation of three awnings over shopfront windows and main entrance, including non-ill…
PP/18/05221
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.

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.