Planning application
26/03486/LBC
25 Hill Street London W1J 5LW
Proposal
External repairs to front and rear facades, replacement linked two-storey annex with roof terrace, rebuilding of rear mansard roof and creation of new internal mezzanine with spiral staircase access and roof terrace. Reconfiguration and landscaping of garden to rear of 27 Hill Street and erection of pavilion building with new access point from Chesterfield Hill, replacement roof plant equipment and internal alterations. (Linked with 26/03485/FULL)
As published by the council, reference 26/03486/LBC
Timeline
Dates from the published record
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28 May 2026
Received by Westminster
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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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26/03485/FULL Awaiting decision
25 Hill Street London W1J 5LW
Replacement linked two-storey annex with roof terrace, rebuilding of rear mansard roof and creation of roof terrace. Reconfiguration and landscaping of garden to rear of 27 Hill Street and erection of pavilion building with new access point from Chesterfield Hill; replacement plant equipment on roof all in association with the continued office (Class E) use. (Linked with 26/03486/LBC)
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04/09915/ADFULL Granted
21 - 23 Hill Street London W1J 5LW
Details of porch, portico, entrance doors and fanlights pursuant to Condition 6 (2,3 +4) of planning permission dated 10 July 2002 (RN: 01/06157).
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05/08895/FULL Decided
21 - 23 Hill Street London W1J 5LW
Installation of two satellite dishes on the roof.
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13/01908/AD7 Granted
25 Hill Street London W1J 5LW
Display for a temporary period of six months of a non-illuminated estate agent board attached to the railings in front of the building at street level and measuring 0.6m x 0.45m.
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05/03875/CAC Decided
21 - 23 Hill Street London W1J 5LW
Installation of lower ground floor level gantry for the purposes of housing the plant.
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05/03874/FULL Granted
21 - 23 Hill Street London W1J 5LW
Installation of two air conditioning chillers and one air handling unit on lower ground floor gantry within acoustic louvres at rear of property.
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)