4 Mansfield Mews London W1G 9NL Data via plota.co.uk
Proposal
Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation of roof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked with 25/05100/LBC) Data via plota.co.uk
Application progress
Withdrawn on 1 Oct 2025 · Last checked 30 Oct 2026
Documents 20
Statements & assessments 3
Plans & drawings 9
Application forms 1
Consultation & comments 2
Other documents 5
Associated applications 2
- Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new…
Site constraints 9
Show all 65 with distances
- 2 m5 and 6, Mansfield Mews W1Grade II
- 3 m5-13, Mansfield Street W1Grade II*
- 13 m48, Harley Street W1Grade II
- 13 m46, Harley Street W1Grade II
- 13 m44, Harley Street W1Grade II
- 16 m50, Harley Street W1Grade II
- 21 m7 and 9, Mansfield Mews W1Grade II
- 25 mNumber 3 and Garden Screen ColonnadeGrade II
- 27 m54, Harley Street W1Grade II
- 40 m76A, NEW CAVENDISH STREET (See details for further address information)Grade II
- 41 m51, Harley Street W1Grade II
- 42 m15, Mansfield Street W1Grade II
- 44 m82, NEW CAVENDISH STREET W1 (See details for further address information)Grade II*
- 44 m49, Harley Street W1Grade II
- 46 mQueen's CollegeGrade II
- 47 m59, Harley Street W1Grade II
- 47 mNo 2 and Attached Railings No 4 and Attached RailingsGrade II
- 49 m8, Queen Anne Street W1Grade II
- 55 m63, Harley StreetGrade II
- 60 m65, Harley Street W1Grade II
- 69 m62, Harley Street W1Grade II
- 71 m39, Harley Street W1Grade II
- 73 m61 and 63, New Cavendish Street W1Grade II*
- 73 m10, Duchess Street W1Grade II
- 77 m37, Harley Street W1Grade II*
- 80 m64 and 66, Harley Street W1Grade II
- 80 mChandos HouseGrade I
- 81 m67, Harley Street W1Grade II
- 85 m19, Duchess Mews W1Grade II
- 85 m17, Duchess Mews W1Grade II
- 87 m21, Duchess Mews W1Grade II
- 89 m69 and 71, Harley Street W1Grade II*
- 90 m9-13, Queen Anne Street W1Grade II
- 91 m24, Queen Anne Street W1Grade II
- 93 m17-21, Portland Place W1Grade II*
- 97 m26, Queen Anne Street W1Grade II
- 100 m28, Queen Anne Street W1Grade II
- 103 m27-35 Portland PlaceGrade II*
- 103 m24, Wimpole Street W1Grade II
- 103 mThird Floor And Fourth Floor Flat 82 Harley Street London W1G 7HB
- 105 m23, Wimpole Street W1Grade II
- 105 m18-20, Wimpole Street W1Grade II
- 106 m73 Harley StreetGrade II
- 114 m75, Harley Street W1Grade II*
- 115 m2-6, Chandos Street W1Grade II
- 117 m34, Queen Anne Street W1Grade II
- 118 m29, Harley StreetGrade II
- 119 m28, 29 and 29a, Wimpole Street W1Grade II
- 121 m77, Harley Street W1Grade II*
- 123 mThe JackalopeGrade II
- 123 m29, Queen Anne Street W1Grade II
- 128 m30, 30a, 30b and 31, Wimpole Street W1Grade II
- 129 m17, Wimpole Street W1Grade II
- 131 m79 and 81, Harley Street W1Grade II
- 131 m31, Queen Anne Street W1Grade II
- 132 m25, Harley Street W1Grade II
- 134 m38, Queen Anne Street W1Grade II
- 135 m78, Harley StreetGrade II*
- 138 m33, Queen Anne Street W1Grade II
- 139 mStatue of Quintin Hogg (in Centre of Road Opposite North End of Broadcasting House)Grade II
- 140 m40, Queen Anne Street W1Grade II
- 142 m33-36, Wimpole Street W1Grade II
- 145 m35, Queen Anne Street W1Grade II
- 148 m21, Harley Street W1Grade II
- 149 m6-14, Harley Street W1Grade II
Checked on 1 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 2
Last sold for £3,625,000 in June 2024. Flat or maisonette, leasehold.
More than one property is recorded at this address: HM Land Registry does not always give the flat or unit.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in September 2021, the latest held for this property. The building may have changed since. View the certificate
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 9NL
- Received
- 22 Jul 2025
- Validated
- 31 Jul 2025
- Ward
- Marylebone
- Case officer
- Show
- Target decision
- 25 Sept 2025
- Decision
- Application Withdrawn
- Decision date
- 1 Oct 2025
- Applicant
- Show
- Agent
- Giles Quarme Architects
Public comments
No public comments yet.
17 neighbours consulted · Last counted 30 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14178898
- Planning Portal ref
- PP-14178898
- Comments by
- 27 Aug 2025
- Site or press notice
- 6 Aug 2025
- Env. assessment
- No
Historical activity at this location
26 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.
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.
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4 Mansfield Mews London W1G 9NL
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