Flat 6 18 Dorset Square London NW1 6QB Data via plota.co.uk
Proposal
Replacement of windows and door with new at fourth and fifth floor levels. (Linked with 26/00742/LBC) Data via plota.co.uk
Application progress
Approved on 8 May 2026 · Delegated Decision · Last checked 8 Jul 2026
Documents 16
Decision & officer reports 2
Statements & assessments 3
Plans & drawings 4
Application forms 1
Consultation & comments 1
Other documents 5
Associated applications 3
- Replacement of windows and door with new at fourth and fifth floor levels. (Linked with)
- Replacement of windows and door with new at fourth and fifth floor levels. (linked wth)
Conditions 3 discharged
Site constraints 8
Show the other 26 with distances
- 32 m23-45, Balcombe Street Nw1Grade II
- 37 m20, Balcombe Street Nw1Grade II
- 39 m21-28, Dorset Square Nw1Grade II
- 40 m32-54, Balcombe Street Nw1Grade II
- 60 m151-179, Gloucester Place Nw1Grade II
- 76 mMarylebone StationGrade II
- 89 m170A, GLOUCESTER PLACE NW1 (See details for further address information)Grade II
- 90 m1-8, Dorset Square Nw1Grade II
- 91 m56, Balcombe Street Nw1Grade II
- 95 m29-40, Dorset Square Nw1Grade II
- 97 m58, Balcombe Street Nw1Grade II
- 98 m47, Balcombe Street Nw1Grade II
- 98 m29-33, Ivor Place Nw1Grade II
- 102 m60, Balcombe Street Nw1Grade II
- 114 m7-15, Balcombe StreetGrade II
- 118 mChagford HouseGrade II
- 120 m62 and 64, Balcombe Street Nw1Grade II
- 121 m49 and 51, Balcombe Street Nw1Grade II
- 124 m6 and 6a, Ivor Place Nw1Grade II
- 129 m181-207, Gloucester Place Nw1Grade II
- 130 m66-92, Balcombe Street Nw1Grade II
- 131 mDorset HouseGrade II
- 132 m53-67, Balcombe Street Nw1Grade II
- 137 m222, Marylebone Road Nw1Grade II
- 145 mChurch of St Cyprian, Clarence GateGrade II*
- 147 mGloucester Arms Public HouseGrade II
Checked on 3 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 £1,730,000 in September 2021. Flat or maisonette, 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
- NW1 6QB
- Received
- 16 Mar 2026
- Validated
- 16 Mar 2026
- Ward
- Regent's Park
- Case officer
- Show
- Target decision
- 11 May 2026
- Decision
- Application Permitted
- Decision date
- 8 May 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Show
- Freehold owner
- Show
How this decision compares
Decided in 53 days from validation, about the council's usual 55 days. 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 →
Consultation & key dates
- Alt. reference
- PP-14744863
- Planning Portal ref
- PP-14744863
- 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
Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.
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Flat 6 18 Dorset Square London NW1 6QB
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Freehold owner, on paid plans
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