23 Sumner Place, London, SW7 3EG Data via plota.co.uk
Proposal
Provision of condenser unit within acoustic enclosure at rear lower ground floor lightwell; replacement of 1x window with 1x timber French doors on the rear elevation at lower ground floor level; replacement of 1x casement window with 1x timber sash window at rear closet wing; provision of two extract vents behind air bricks at rear elevation; and internal alterations to improve layout with restoration of historic detailing Data via plota.co.uk
Application progress
Approved on 12 Mar 2026 · Last checked 23 Oct 2026
Associated applications 2
- Provision of condenser unit within acoustic enclosure at rear lower ground floor lightwell; replacement of 1x window with 1x…
Conditions details submitted for 3
Site constraints 9
Show all 12 with distances
- 0 m13-23, Sumner Place Sw7Grade II
- 12 mEntrance Arch From Sumner PlaceGrade II
- 22 m41-75, Onslow Square Sw7Grade II
- 31 m3-12, SUMNER PLACE SW7 (See details for further address information)Grade II
- 37 m77-109, Onslow Square Sw7Grade II
- 65 m44-54, Onslow Square Sw7Grade II
- 116 mChurch of St PaulGrade II
- 122 m1-10, Cranley Place Sw7Grade II
- 141 m2-42, Onslow Square Sw7Grade II
- 146 mEntrance Arch From Cranley PlaceGrade II
- 147 mSouth Kensington Underground StationGrade II
- 149 m9-25, Onslow SquareGrade II
Checked on 3 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.
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Important details
- Council
- Kensington and Chelsea
- Application type
- Listed Building Consent
- Postcode
- SW7 3EG
- Received
- 6 Oct 2025
- Validated
- 6 Oct 2025
- Ward
- Courtfield
- Case officer
- Show
- Target decision
- 1 Dec 2025
- Decision
- Granted
- Decision date
- 12 Mar 2026
- Applicant
- Show
How this decision compares
Decided in 157 days from validation, 79 days slower than Kensington and Chelsea's median of 78 for extensions. Approved, as 95% of extensions here are.
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
- 14 Nov 2025
Historical activity at this location
27 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
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%).
Track this application
23 Sumner Place, London, SW7 3EG
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