Planning application
25/09112/FULL
17 Grosvenor Street London W1K 4QH
Proposal
Installation of air source heat pump in modified plant enclosure; green roof and rooflights; modifications to front mansard profile and front elevation.
As published by the council, reference 25/09112/FULL
Timeline
Dates from the published record
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17 Dec 2025
Received by Westminster
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2 Apr 2026
Decision issued: Application Permitted
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20 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
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
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07/10026/AD7 Granted
14 Brook's Mews London W1K 4DT
Display for a temporary period of six months of a non-illuminated 'to let' Estate Agent Board located on the face of the building at a height of between 3m and 4.6m above pavement level and measuring 1.2m x 0.9m.
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06/09001/AD7 Granted
14 Brook's Mews London W1K 4DT
Display for a temporary period of six months of a non-illuminated 'to let'/ 'for sale' board located on the face of the building at a height of between 3m and 4.6m above pavement level and measuring 1.2m x 0.9m.
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13/02400/ADFULL Granted
14-16 Brook's Mews London W1K 4DT
Detailed drawings and a bio-diversity management plan in relation to the green roof; to include construction method, layout, species and maintenance regime pursuant to Condition 4 of planning permission dated 21 December 2011 (RN: 11/07641).
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08/03194/AD7 Granted
14 Brook's Mews London W1K 4DT
Display for a temporary period of six months of a non-illuminated 'to let' Estate Agent Board located on the face of the building at a height of between 3m and 4.6m above pavement level and measuring 1.2m x 0.9m.
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08/00952/FULL Refused
17 Brook's Mews London W1K 4DT
Use of the ground floor as a management office in association with the residential accommodation. Installation of a new glazed shopfront and entrance door.
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08/00950/FULL Granted
17 Brook's Mews London W1K 4DT
Replacement of existing entrance doors and new paving to entrance recess.
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26/04824/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site. pursuant to condition 32 (i) of planning permission dated 8th April 2024 (23/00571/FULL).
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26/04829/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Details of external and internal signage strategy pursuant to Condition 33(E) of planning permission dated 8th April 2024 (RN: 23/00571/FULL)
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26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.