Planning application
Second Floor And Third Floor Maisonette 1 Castellain Road London W9 1EY
Works: Loft or dormer Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Alterations to rear roof dormer and windows, to enlarge dormer and install new bifold doors and create balcony space.
As published by the council, reference 26/00463/FULL
Application record
- Reference
- 26/00463/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 27 Jan 2026
- Validated
- 27 Jan 2026
- Ward
- Little Venice
- Postcode
- W9 1EY
Timeline
Dates from the published record
-
27 Jan 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 24 March 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 65 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Rozeman Architects Agent, an architecture practice
7 applications on PlanIndex · across 3 councils
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
25 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
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 91 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
-
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 -
28 Formosa Street London W9 2QA
100% historically approved · decision due ~6 May
1 x bay: fell
Awaiting decision Trees 10 docs -
24 Castellain Road London W9 1EZ
87% historically approved · decision due ~10 Nov
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.
Awaiting decision Full applications Loft or dormer -
9 Warrington Gardens London W9 2QB
1x London plane (T1, Front); Reduce crown back to most recent reduction points leaving suitable shortened soft furnishing growth with a natural balanced canopy
Granted Trees 8 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
In Westminster
-
26/06295/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Installation of a new shopfront.
-
26/06297/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.
-
26/06287/FULL Awaiting decision
Barness Court 6 - 8 Westbourne Terrace London W2 3UW
Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06288/LBC)
-
26/06278/FULL Awaiting decision
40 Wellington Road London NW8 9TJ
Installation of a new external access ramp/slope to provide accessibility to the Barclays bank ATM.
-
26/06269/FULL Awaiting decision
Maisonette Basement And Ground Floor 101 Hereford Road London W2 5BB
Amalgamation of existing lower ground and ground floor maisonette with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06270/LBC)