Planning application
Second Floor Flat 109 Bell Street London NW1 6TL
Works: Loft or dormer Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Erection of additional storey to existing second floor flat, conversion of 1 flat into a 3-bed duplex with front elevation dormer windows set back from principal elevation.
As published by the council, reference 25/09282/FULL
Application record
- Reference
- 25/09282/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 22 Dec 2025
- Validated
- 23 Mar 2026
- Ward
- Church Street
- Postcode
- NW1 6TL
Timeline
Dates from the published record
-
22 Dec 2025
Received by Westminster
-
23 Mar 2026
Validated
Checked as complete and ready for consideration.
-
20 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 18 May 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 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
KAS Architects Agent, an architecture practice registered in London
Active · incorporated 2020 · London
14 applications on PlanIndex · across 5 councils · 82% granted
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
14 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
-
Stafford House Cosway Street London NW1 6TJ
Replacement of all single glazed timber windows with double-glazed timber sash and casement windows.
Granted Full applications Windows or glazing 65 docs -
Development Site At 26 To 46 Lisson Grove And 18 Hayes Place London
Confirmation that material operations were undertaken in order to lawfully implement planning permission referenced 22/05145/FULL, dated 06 January 2023, for the purpose of Section 56 of the Town and Country Planning Act (1990) (as amended) prior to the expiry of this permission at the end of 6 January 2026.
Granted Lawful development 22 docs -
18 Lisson Grove London NW1 6TT
87% historically approved · decision due ~8 May
Erection of a extension, conversion and refurbishment of the site to deliver three new residential units; together with the extension and improvement of the existing apartments, external alterations, and the utilisation of the ground floor office space to provide a single commercial unit (Class E).
Awaiting decision Full applications New dwelling Extension 23 docs -
24 Lisson Grove London NW1 6TT
87% historically approved · decision due ~10 Feb
Erection of ground and first floor rear extension to form a two-bedroom self-contained flat, conversion of the existing ground floor office to a one-bedroom self-contained flat, and office to basement.
Awaiting decision Full applications Extension 16 docs -
Adjacent To 2 Bendall Mews London NW1 6SN
Details of Thames yellow brick pursuant to Condition 4a of planning permission granted on appeal dated 14 August 2003 (RN: 02/08190).
Granted Full applications 1 doc -
5 Bendall Mews London NW1 6SN
Details of obscured glazed window pursuant to Condition 7 of planning permission dated 20 March 2007 (RN: 07/01131).
Granted Full applications Windows or glazing 2 docs
Other full applications
In Westminster
-
26/06295/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Installation of a new shopfront with Medication Dispensing Outlet.
-
26/06297/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.
-
26/06294/FULL Awaiting decision
15 Eaton Mews South London SW1W 9HP
Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.
-
26/06317/FULL Awaiting decision
124 Hamilton Terrace London NW8 9UT
Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)
-
26/06273/FULL Awaiting decision
9A Grosvenor Square London W1K 5AE
Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)