Planning application
24 Castellain Road London W9 1EZ
Works: Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Use of part of the existing main flat roof as a private residential roof terrace; installation of black painted metal balustrading/railings; provision of safe access to the roof terrace via a sliding rooflight; installation of an Air Source Heat Pump (ASHP) at roof terrace level; construction of enlarged dormer and a terrace the rear of the 3rd floor; and associated works.
As published by the council, reference 26/06154/FULL
Application record
- Reference
- 26/06154/FULL
- Category
- Full applications
- Status
- Pending
- Received
- 9 Sep 2026
- Validated
- 15 Sep 2026
- Postcode
- W9 1EZ
Timeline
Dates from the published record
-
9 Sep 2026
Received by Westminster
-
15 Sep 2026
Validated
Checked as complete and ready for consideration.
-
15 Sep 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 10 November 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 64 days over the applications it decided in the last year.
What 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 89 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 500 metres
-
26 Castellain Road London W9 1EZ
Use of roof as roof terrace, plus installation of associated railings and decking.
Granted Full applications 14 docs -
Second Floor And Third Floor Maisonette 1 Castellain Road London W9 1EY
87% historically approved · decision due ~24 Mar
Alterations to rear roof dormer and windows, to enlarge dormer and install new bifold doors and create balcony space.
Awaiting decision Full applications Loft or dormer Windows or glazing 25 docs -
11 Pindock Mews London W9 2PY
87% historically approved · decision due ~19 Jun
Conversion of garage into a habitable space including alterations to existing pitched roof to create roof extension including installation of two dormer windows to the front elevation and two dormer windows with infill roof slope to the rear elevation. (Retrospective and includes amendments to works approved under application 24/04993/FULL including resolving of discrepancies in the front and rear elevations including modifications to windows, dormer design, and materials).
Awaiting decision Full applications Extension Loft or dormer +1 18 docs -
149 Sutherland Avenue London W9 1ES
87% historically approved · decision due ~27 Apr
Removal of the exterior staircase between upper ground floor level and garden of Flat A and installation of a Juliet balcony railing to doors at upper ground floor level and associated works.
Awaiting decision Full applications 13 docs -
7A Pindock Mews London W9 2PY
Detail elevation drawings, section drawings of the new windows and doors and a sample of the glass (at least 300mm square) and window restrictors to allow maximum opening of 20cm pursuant to condition 4 and 5 of planning permission dated 28th July 2025 (RN:25/03892/FULL)
Refused Full applications Windows or glazing 11 docs -
11 Pindock Mews London W9 2PY
87% historically approved · decision due ~6 May
Details of sample of the glass (at least 300mm square) for all windows and provide a manufacturer's specification or drawing of the restrictors to be fitted to the dormer windows to prevent them being fully openable pursuant to condition 5 of planning permission dated 31st October 2024 (RN: 24/04993/FULL).
Awaiting decision Full applications Loft or dormer Windows or glazing 3 docs
Other full applications
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-
26/03576/FULL Decided
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Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)
-
26/06207/FULL Awaiting decision
8 Moscow Road London W2 4BT
Installation of rooftop plant and a metal plant enclosure, together with associated external alterations including the demolition of 7 (no.) existing chimney stacks, levelling of the parapet between Nos. 8-14 Moscow Road, and the installation of a new riser conduit and restaurant duct to the rear elevation
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26/06205/FULL Awaiting decision
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Temporary ground investigation works and archaeological monitoring including the excavation of trial pits and boreholes within Richmond House.
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26/06175/FULL Awaiting decision
66 Chepstow Road London W2 5BE
Replacement of front and rear windows with vacuum glazing and slightly narrower glazing bars; replacement of front and basement access doors with new front door, fanlight and frame (vacuum-glazed) and new (vacuum-glazed) basement access door. (Linked with 26/05852/LBC)
-
26/06149/FULL Awaiting decision
37 Crawford Street London W1H 1HA
Use of the First, Second and Third Floors as residential units (Class C3) with Office (or other Use Class E) Use retained at Basement and Ground Floor Levels. (Linked with 26/06150/LBC)