14 Devonshire Mews West London W1G 6QE Data via plota.co.uk
Proposal
The replacement of an existing full-width, half-depth rear kitchen/diner extension and the replacement of metal roller shutter garage door to the front with a timber garage door. Data via plota.co.uk
Application progress
Approved on 8 Jun 2026 · Delegated Decision · Last checked 24 Sept 2026
Documents 27
Decision & officer reports 2
Statements & assessments 2
Plans & drawings 16
Application forms 1
Consultation & comments 1
Other documents 5
Associated applications 2
- The replacement of an existing full-width, half-depth rear kitchen/diner extension and the replacement of metal roller shutter…
Conditions 3 awaiting decision
Site constraints 12
Show all 24 with distances
- 4 m13, Devonshire Mews West W1Grade II
- 17 m14-17, Devonshire Place W1Grade II
- 21 m13, Devonshire Place W1Grade II
- 23 m135-145, Harley Street W1Grade II
- 24 m6-12, DEVONSHIRE PLACE W1 (See details for further address information)Grade II
- 57 m127-131, Harley Street W1Grade II
- 61 m27-31, Devonshire Place W1Grade II
- 64 m23-25, Devonshire Place W1Grade II
- 69 m126-150, Harley Street W1Grade II
- 72 mNos. 33 to 41, Devonshire PlaceGrade II
- 92 m121, Harley Street W1Grade II*
- 102 m120 and 122, Harley Street W1Grade II
- 119 mUlster PlaceGrade I
- 119 mNumbers 18 to 26 (Including the Former Number 27)Grade I
- 130 m115a, Harley Street W1Grade II
- 131 m8-13, Upper Wimpole Street W1Grade II
- 135 m115, Harley Street W1Grade II*
- 141 m1-4, UPPER HARLEY STREET NW1 (See details for further address information)Grade II
- 143 m3 Lamp Standards in St Mary's Marylebone ChurchyardGrade II
- 143 m14-23, Upper Wimpole Street W1Grade II
- 145 m111 and 113, Harley Street W1Grade II
- 146 mRoyal Academy of MusicGrade II
- 148 mMarylebone Adult Education CentreGrade II
- 148 m110 and 112, Harley Street W1Grade II
Checked on 2 November 2026. 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 3
Last sold for £1,240,000 in April 2003. Terraced house, leasehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Every application in Westminster - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- Westminster
- Application type
- Full Planning Permission Application
- Postcode
- W1G 6QE
- Received
- 18 Feb 2026
- Validated
- 18 Feb 2026
- Ward
- Marylebone
- Case officer
- Show
- Target decision
- 15 Jun 2026
- Decision
- Application Permitted
- Decision date
- 8 Jun 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Coull Architecture Ltd
How this decision compares
Decided in 110 days from validation, 55 days slower than Westminster's median of 55 for extensions. Approved, as 88% of extensions here are.
Plota live figures for extensions decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
13 neighbours consulted · Last counted 24 Sept 2026
Consultation & key dates
- Alt. reference
- PP-14707892
- Planning Portal ref
- PP-14707892
- Comments by
- 22 Apr 2026
- Site or press notice
- 24 Mar 2026
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
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.
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
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14 Devonshire Mews West London W1G 6QE
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