Planning application
Flat 41 2 Mansfield Street London W1G 9NF
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Installation of external AC condenser at main roof level, associated connection to Flat 41 and associated internal modifications. (Linked with 26/05036/LBC)
As published by the council, reference 26/05035/FULL
Application record
- Reference
- 26/05035/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 27 Jul 2026
- Validated
- 27 Jul 2026
- Ward
- Marylebone
- Postcode
- W1G 9NF
Timeline
Dates from the published record
-
27 Jul 2026
Received by Westminster
-
4 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 21 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 61 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in London
30 applications on PlanIndex · across 8 councils · 83% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
10 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
-
Flat 45 2 Mansfield Street London W1G 9NF
90% historically approved · decision due ~22 May
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02044/FULL)
Awaiting decision Heritage and listed buildings Extension Loft or dormer +1 1 doc -
Flat 45 2 Mansfield Street London W1G 9NF
87% historically approved · decision due ~22 May
Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)
Awaiting decision Full applications Extension Loft or dormer +1 12 docs -
Flat 43 2 Mansfield Street London W1G 9NF
87% historically approved · decision due ~12 May
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00590/LBC)
Awaiting decision Full applications 22 docs -
Flat 43 2 Mansfield Street London W1G 9NF
90% historically approved · decision due ~12 May
Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00589/FULL)
Awaiting decision Heritage and listed buildings 2 docs -
Flat 16 2 Mansfield Street London W1G 9NF
Replacement windows and door to the rear elevation.
Granted Heritage and listed buildings Windows or glazing 12 docs -
Flat 49 2 Mansfield Street London W1G 9NF
90% historically approved · decision due ~29 Jul
Replacement of seven windows.
Awaiting decision Heritage and listed buildings Windows or glazing 15 docs
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Installation of one number new external condenser unit to the southerly elevation service alley.
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