Stafford House Cosway Street London NW1 6TJ
Approved on 19 March 2026
Council decision: Application PermittedDelegated (officer decision)
Proposal
Replacement of all single glazed timber windows with double-glazed timber sash and casement windows.
- Received
- 1 December 2025
- Decision level
- Delegated (officer decision)
- Council
- City of Westminster
- Ward
- Church Street
- ReceivedReceived1 Dec
- ValidatedValidated1 Dec
- Consult.Consultation
- TargetTarget Date26 Jan
- DecidedDecided19 Mar
Decided in 108 days (council typically 49)
About this application
This is a full planning application for window replacement at Stafford House Cosway Street London NW1 6TJ. Westminster has handled 4,484 applications of this type. This one was decided in 108 days, 8 weeks longer than Westminster's typical decision time. The site is in the Lisson Grove conservation area, with 3 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 33 applications across Church Street. We hold 3,181 applications in total for the NW1 postcode area.
86% of full applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- NW1 6TJ
- Application type
- Full Planning Permission Application
- Scale / size
- Small
Planning application dates
- Date validated
- 1 December 2025
- Consultation expiry
- 18 March 2026
- Target decision date
- 26 January 2026
Applicant and agent
- Agent
- Bluelime
- Agent address
- The Engine House 2 Veridion Way Erith DA18 4AL United Kingdom
Planning decision
- Statutory period
- 56 days
Publicity
- Last advertised
- 25 February 2026
- Advertisement expiry
- 18 March 2026
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Lisson Grove
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
- Brownfield land register: Marylebone Institute School House 29 Cosway Street London NW1 6THRegister site at or near this address · +1 more
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (20)
flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves and heritage coasts.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- Flat 6 97 Bell Street London NW1 6TL18/05555/FULL · FullRefused0.0 mi
- Bell Street London NW110/02274/NMA · AmendmentApproved0.0 mi
- Bell Street London NW110/02008/ADFULL · ConditionsApproved0.0 mi
- Marylebone Institute School House 29 Cosway Street London NW1 6TH17/11404/COFUL · FullApproved0.0 mi
- Marylebone Institute School House 29 Cosway Street London NW1 6TH21/01842/COGADF · ConditionsApproved0.0 mi
For applicants and trades
Contractors near this project
Find contractors for windows & doors near this site- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman1.1 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing1.4 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.4 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering6.0 mi
Planning something similar?
See what the council approved and refused for window and door replacements on your street. Pick your home and get the evidence before you pay for drawings.