Planning application
17 Grosvenor Street London W1K 4QH
Works: Loft or dormer Windows or glazing
Relates to 25/09112/FULL
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
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. (Application under section 73 of the Act)
As published by the council, reference 26/05516/FULL
Application record
- Reference
- 26/05516/FULL
- Category
- Full applications
- Status
- Pending
- Received
- 13 Aug 2026
- Validated
- 13 Aug 2026
- Ward
- West End
- Postcode
- W1K 4QH
Site history
Applications at this address on the Westminster register
This site has had 2 applications since 2025: 1 approved, 0 refused.
-
25/09112/FULL Granted
17 Grosvenor Street London W1K 4QH
Installation of air source heat pump in modified plant enclosure; green roof and rooflights; modifications to front mansard profile and front elevation.
Timeline
Dates from the published record
-
13 Aug 2026
Received by Westminster
-
28 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 8 October 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 86 days over the applications it decided in the last year.
Related applications
Cases linked to this one on the register
-
25/09112/FULL Granted
17 Grosvenor Street London W1K 4QH
Installation of air source heat pump in modified plant enclosure; green roof and rooflights; modifications to front mansard profile and front elevation.
Who's behind it
Company information only, from the register and Companies House
COWIE MONTGOMERY ARCHITECTS LLP Agent, an architecture practice registered in East Sussex
Active · incorporated 2006 · East Sussex
2 applications on PlanIndex
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
17 documents on file for this application
- RECEIPT OF APPLICATION
- APPLICATIONFORMREDACTED
- ATTACHMENTSUMMARY
- CONSENTED FOURTH FLOOR PLAN
- CONSENTED FIFTH FLOOR / ROOF PLAN
- CONSENTED ACOUSTIC REPORT
- CONSENTED REAR ELEVATIONS
- CONSENTED SOUTH-NORTH SECTION
- CONSENTED WEST ELEVATION
- PROPOSED FOURTH FLOOR PLAN
- PROPOSED FIFTH FLOOR / ROOF PLANS
- PROPOSED ACOUSTIC REPORT
- PROPOSED WEST ELEVATION DETAIL
- PROPOSED REAR ELEVATIONS
- PROPOSED SOUTH-NORTH SECTION
- PROPOSED WEST ELEVATION
- SUPPORTING STATEMENT
Watch members (£5 a month) open the document list from here.
Open the documentsWhat happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
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17 Grosvenor Street London W1K 4QH
Installation of air source heat pump in modified plant enclosure; green roof and rooflights; modifications to front mansard profile and front elevation.
Granted Full applications Loft or dormer 35 docs -
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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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14 Brook's Mews London W1K 4DT
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Granted Advertising 1 doc -
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