cs:westminster:26/05516/FULLPlanning Application cs:westminster:26/05516/FULL
Planning application at 17 Grosvenor Street London W1K 4QH, Westminster. View planning documents, track the decision and get email alerts on updates.
Variation of condition 1 of planning permission dated 2nd April 2026 (RN:25/09112/FULL) for the Installation of air source heat pump in modified plant enclosure; green roof and rooflights; modifications to front mansard profile and front elevation. Namely, omission of 3 rooflights over the 4th floor and addition of a dormer window at the 4th floor rear and addition of a mechanical vent and heat recovery unit at the rear of the central flat roof.
26/05516/FULL
17 Grosvenor Street London W1K 4QH
This is a planning application for a dormer extension at 17 Grosvenor Street London W1K 4QH. Westminster has handled 18,781 applications of this type and approves 88% of them, typically deciding them in 56 days. It was submitted on 13 August 2026 and is still awaiting a decision. The site is in the Mayfair conservation area, with 19 listed buildings nearby. There has been 1 other application at this address. We hold 454 applications in total for the W1K postcode area.
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Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster