10 Chapel Street London SW1X 7BY Data via plota.co.uk
Proposal
Detailed drawings (sections and elevations at a scale of 1:5 and 1:10) showing the window at rear third floor level above the closet wing extension must match the windows in the rear closet wing extension in terms of size and detailed design (see informative 5) and the two roof skylights must be conservation area styled rooflights, reduced in size, centrally positioned and closer to the roof ridge and detailed drawings (sections and elevations at a scale 1:5 and 1:10) of the new windows within the closet wing extension (see informative 5) pursuant to condition 6 and 7 of planning permission dated 10th July 2025 (RN:) Data via plota.co.uk
Application progress
Approved on 3 Jul 2026 · Delegated Decision · Last checked 6 Jul 2026
Documents 14
Decision & officer reports 2
Plans & drawings 4
Application forms 2
Other documents 6
Associated applications 4
Part of
Conditions 3, 6, 7 discharged
- ConditionsDetailed drawings (sections and elevations at a scale of 1:5 and 1:10) showing the window…This application26/04209/ADFULL
Show 2 more · 1 approved, 1 refused
Site constraints 7
Show the other 20 with distances
- 23 m13 and 14, Chapel Street Sw1Grade II
- 27 m17, Grosvenor Place Sw1Grade II
- 31 m18-20, Grosvenor Place Sw1Grade II
- 33 m15-18, Chapel Street Sw1Grade II
- 48 m33-37, Chapel Street Sw1Grade II
- 56 mNumbers 6 to 14 (Consecutive) Grosvenor Place, 41 Chapel Street and Mews Arch to Halkin StreetGrade II
- 61 m19-23, Chapel Street Sw1Grade II
- 62 m2-7 Chester StreetGrade II
- 68 m28-32, Chapel Street Sw1Grade II
- 86 m8-14, Chester Street Sw1Grade II
- 87 m28a, Chapel Street Sw1Grade II
- 97 m26, Chapel Street Sw1Grade II
- 102 m27, Chapel Street Sw1Grade II
- 103 m15-17, Chester Street Sw1Grade II
- 117 m18-32, Chester Street Sw1Grade II
- 124 mSeaford House and Gate PiersGrade II*
- 126 m5 Groom Place and stable yardGrade II
- 137 m1-4, Halkin Street Sw1Grade II
- 147 m3, Wilton Mews Sw1Grade II
- 149 m1 AND 2, UPPER BELGRAVE STREET SW1 (See details for further address information)Grade II
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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Important details
- Council
- Westminster
- Application type
- Approval of Details (Full PP)
- Postcode
- SW1X 7BY
- Received
- 25 Jun 2026
- Validated
- 25 Jun 2026
- Ward
- Knightsbridge & Belgravia
- Case officer
- Show
- Target decision
- 20 Aug 2026
- Decision
- Application Permitted
- Decision date
- 3 Jul 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Easton Design Office Ltd
How this decision compares
Decided in 8 days from validation, 45 days faster than Westminster's median of 53 for extensions. Approved, as 87% of extensions here are.
Plota live figures for extensions decided by Westminster in the last twelve months, from validation. Westminster decision record →
Consultation & key dates
- Alt. reference
- PP-15039599
- Env. assessment
- No
Historical activity at this location
28 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
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10 Chapel Street London SW1X 7BY
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Referenced application
Council archive
10 Chapel Street London SW1X 7BY
Erection of a basement extension, replacement of the existing conservatory at rear lower ground floor level with a new single storey extension; installation of new windows at the rear of the property and installation of sky lights on the roof.
- Received
- 6 Mar 2025
- Outcome
- Pending