8 Cornwall Mews West, London, SW7 4BH Data via plota.co.uk

Approved PP/25/05733
Extensions & alterations
Council
Kensington and Chelsea 5.1/10
Date received
6 Oct 2025
Date validated
6 Oct 2025
Decision date
10 Mar 2026
Postcode
SW7 4BH

Description

Construction of second floor roof addition Data via plota.co.uk

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Last checked

How this decision compares

Decided in 155 days from validation, 65 days slower than Kensington and Chelsea's median of 90 for extensions. Approved, as 96% of extensions here are.

32%decided within 8 weeks
96%approved
1,220decided 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 →

Associated applications 3

Site constraints 5

Cornwall 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 Named permitted development rights are withdrawn here.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
Inside the Kensington and Chelsea built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 11 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.

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Other new applications on this street

29 Jul 2026Pending

4 Cornwall Mews South, London, SW7 4RZ

Construction of mansard roof extension with 3 dormers to front and rear, set bac...

PP/26/03984

Nearby new applications

7 Sept 2026Pending

22 Victoria Road, London, W8 5RG

Alterations to existing rear extension, including replacement of existing glazed...

PP/26/04646
7 Sept 2026Pending

12 Kensington Square, London, W8 5HE

Variation of Condition 3 (Submission of details) of listed building consent LB/2...

LB/26/04828
7 Sept 2026Pending

12 Kensington Square, London, W8 5HE

Variation of condition 2 (approved drawings) of listed building consent LB/23/03...

LB/26/04820
7 Sept 2026Pending

12 Kensington Square, London, W8 5HE

Variation of Condition 4 (Submission of details) of planning permission PP/23/03...

PP/26/04827
7 Sept 2026Pending

12 Kensington Square, London, W8 5HE

Variation of condition 2 (approved drawings) of planning permission PP/23/03485 ...

PP/26/04819
4 Sept 2026Pending

14 Cottesmore Gardens, London, W8 5PR

Non-material amendment to planning permission 26/00910 (Variation of condition 2...

NMA/26/04758

Historical activity at this location

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

Within ~100m

Nearby activity

2025
10 St Mary's Place, London, W8 5UE
Construction of single-storey side infill extension at rear.
PP/25/06656
2025
Flat 7, 48 Lexham Gardens, London, W8 5JA
Internal reconfiguration; replacement of all windows to front and rear elevations, includ…
PP/25/06328
2025 Approved
Albert House, 27 Kelso Place, London, W8 5QG
Variation of condition 2 (approved drawings) of planning permission PP/24/00172 (Replacem…
PP/25/04817
2025 Approved
Basement And Ground Floor Maisonette, 42 Lexham Gardens, London, W8 5JE
Construction of a lightweight, predominantly glazed rear outside shelter/garden room at l…
PP/25/04594
2025 Approved
10 and 11 St Mary's Place, London, W8 5UE
Erection of a new external metal staircase, new metal railings and new first floor timber…
PP/25/04399
2025 Approved
2 Lexham Walk, London, W8 5JD
Variation of condition 2 (compliance with approved drawings) of planning permission 25/01…
PP/25/04031
2025 Approved
54 Cornwall Gardens, London SW7 4BG
Prune 4x as specified in side garden adjacent to No. 54
ARB/25/01723
2025 Approved
13 Cornwall Gardens Walk, London, SW7 4BJ
Conversion of roof to mansard style roof with dormer windows, alterations to front elevat…
PP/25/00793
2025 Approved
2 Lexham Walk, London, W8 5JD
Rear extension to lower ground floor and partial infill to side lightwell. Internal layou…
PP/25/01244
2025 Approved
10 and 11 St Mary's Place, London, W8 5UE
Partial replacement of existing masonry boundary wall with metal boundary wall
PP/25/00108
2024 Approved
19 Kelso Place, London, W8 5QG
Infill ground floor rear extension; addition of side windows at ground floor level; remov…
PP/24/07616
2024 Approved
19 Kelso Place, London, W8 5QG
Enlargement of first floor rear window to create a floor to ceiling window
PP/24/07620
2024 Withdrawn
10-11 St Mary's Place, LONDON, W8 5UE
Erection of external metal staircase, metal railings and first floor timber French doors…
PP/25/00090
2024 Withdrawn
2 Lexham Walk, London, W8 5JD
Creation of 1 x 1 bed residential unit (Use Class C3), rear extension at lower ground flo…
PP/24/02197
2024 Withdrawn
16 Eldon Road, London, W8 5PU
Variation of Condition 2 (Compliance with approved drawings) of planning permission PP/22…
PP/24/02429
2024 Approved
Flat B, 51 Cornwall Gardens, London, SW7 4BG
Replacement of single glazing windows with slimline double-glazed windows. Installation o…
PP/24/07553
2024 Approved
Ground Floor Flat, 51 Cornwall Gardens, London, SW7 4BG
Internal re-configuration of ground floor flat; refurbishment of windows and replacement…
PP/24/07552
2024 Approved
1 Lexham Walk, LONDON, W8 5JD
Prune 1x Bay and 1x Magnolia
ARB/24/07703
2024 Approved
50A Cornwall Gardens, LONDON, SW7 4BG
Replacement of single glazed timber framed windows and doors with double glazed timber fr…
PP/24/04448
2024 Approved
18 Kelso Place, LONDON, W8 5QD
Proposed rear extension to second floor of existing rear closet wing.
PP/24/03778
2019 Refused
16 Eldon Road, London, W8 5PU
Partial demolition and rebuilding including basement, third floor mansard and two-storey…
PP/19/02096
2019 Withdrawn
16 Eldon Road, London, W8 5PU
***WITHDRAWN*** Demolition, rebuilding including basement, third floor mansard and two st…
PP/19/00289
2019 Withdrawn
10 Cornwall Mews West, London, SW7 4BH
Construction of a single storey rear extension (***WITHDRAWN APPLICATION 28/02/2019***)
PP/19/00616
2018 Approved
Flat L, 54 Cornwall Gardens, LONDON, SW7 4BG
Premises to be used as a private vehicle hire operator (Certificate of Proposed Developme…
CL/18/07446
2018 Approved
32 Stanford Road, LONDON, W8 5PZ
Replacement of railings and gate at front elevation; stone steps, path and copings on bal…
PP/18/05610
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