Planning application
26/01152/LBC
Flat 10 2 Mansfield Street London W1G 9NF
Proposal
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01151/FULL
As published by the council, reference 26/01152/LBC
Timeline
Dates from the published record
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24 Feb 2026
Received by Westminster
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13 Apr 2026
Validated
Checked as complete and ready for consideration.
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What 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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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26/01151/FULL Awaiting decision
Flat 10 2 Mansfield Street London W1G 9NF
Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC
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26/01207/LBC Awaiting decision
Flat 49 2 Mansfield Street London W1G 9NF
Replacement of seven windows.
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22/02222/FULL Granted
Flat 16 2 Mansfield Street London W1G 9NF
Replacement windows and door to the rear elevation.
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26/02045/LBC Awaiting decision
Flat 45 2 Mansfield Street London W1G 9NF
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)
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26/02044/FULL Awaiting decision
Flat 45 2 Mansfield Street London W1G 9NF
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)
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25/07282/FULL Awaiting decision
4 Queen Anne Street London W1G 9LQ
Variaiton of Conditon 1 of planning permission dated 18 November 2024 (RN: 24/05063/FULL) for, 'Installation of two air conditioning units at main roof level with associated pipework on the rear elevation, installation of two grilles on the rear wall in the lightwell at lower ground floor level and internal alterations at lower ground and ground floor levels'; Namely, to amend the approved plans to allow for repositioning of the 2no. plant units on the roof in addition to providing new higher performance anti-vibration mounts. (Linked with 25/07252/LBC) (Application under Section 73 of the Act).
Other heritage and listed buildings applications
In Westminster
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26/04984/LBC Awaiting decision
47G Randolph Avenue London W9 1BQ
Installation of replacement fire surround.
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26/04997/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of a morning room side extension. (Linked to 26/04996/FULL)
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26/04979/LBC Awaiting decision
12 Brewer Street London W1F 0SF
Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.
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26/04987/LBC Awaiting decision
Basement And Ground Floor 8 Ganton Street London W1F 7QL
Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.
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26/04995/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)