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Planning application

40 Westbury Road London N12 7PD

Awaiting decision Barnet 25/4847/192 Proposed Lawful Development Certificate

Works: Extension 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

Roof extension involving rear dormer window and 3no. front facing rooflights

As published by the council, reference 25/4847/192

Application record

Reference
25/4847/192
Type
Proposed Lawful Development Certificate
Status
Pending Consideration
Received
3 Dec 2025
Validated
4 Dec 2025
Ward
West Finchley
Postcode
N12 7PD

Site history

Applications at this address on the Barnet register

This site has had 3 applications since 2025.

  • 26/0584/192 Decided

    40 Westbury Road London N12 7PD

    Roof extension involving rear dormer window and 3no. front facing rooflights

    Decided 17 Feb 2026 Lawful development
  • 26/0521/192 Awaiting decision

    40 Westbury Road London N12 7PD

    Roof extension involving rear dormer window and 3no. front facing rooflights

    Submitted 10 Feb 2026 Lawful development

Timeline

Dates from the published record

  1. 3 Dec 2025

    Received by Barnet

  2. 4 Dec 2025

    Validated

    Checked as complete and ready for consideration.

  3. 10 Aug 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 29 January 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Barnet took a median of 43 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Agent on file, a design practice

11 applications on PlanIndex · across 4 councils

Trade members see who it is, their full track record, and every application they have filed.

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Documents

Plans, drawings, consultee responses and the officer's report

7 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.

Trade members open them from here.

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What happens while it is decided

This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 40 Westbury Road London N12 7PD

    26/0521/192 Submitted 10 Feb 2026 0m away

    79% historically approved · decision due ~7 Apr

    Roof extension involving rear dormer window and 3no. front facing rooflights

    Awaiting decision Lawful development Extension Loft or dormer +1 8 docs

  • 40 Westbury Road London N12 7PD

    26/0584/192 Submitted 16 Feb 2026 11m away

    Roof extension involving rear dormer window and 3no. front facing rooflights

    Decided Lawful development Extension Loft or dormer +1 7 docs

  • 1 Argyle Road London N12 7NU

    26/1675/RCU Submitted 5 May 2026 50m away

    71% historically approved · decision due ~1 Jul

    Installation of football goal net with floodlights, boundary netting and supports (Retrospective Application)

    Awaiting decision Amendments 6 docs

  • Brook Lodge 7A Argyle Road London N12 7HS

    21/5354/192 Submitted 8 Oct 2021 100m away

    Single storey side extension

    Decided Lawful development Extension 11 docs
    Small domestic

  • 65 Westbury Road London N12 7PB

    26/2670/HSE Submitted 17 Jul 2026 127m away

    77% historically approved · decision due ~11 Sep

    Erection of a rear outbuilding following demolition of the existing outbuilding

    Awaiting decision Householder Demolition
    Small domestic

  • 57 Westbury Road London N12 7PB

    26/2402/192 Submitted 24 Jun 2026 127m away

    79% historically approved · decision due ~20 Aug

    Changes to fenestration including insertion of 3no. new windows to north elevation, 1no. new window to south elevation. 2no. new windows to rear elevation, alterations to front elevation: front door, rooflights and windows

    Awaiting decision Loft or dormer Windows or glazing

In Barnet

  • 26/2679/192 Decided

    21 Myddelton Park London N20 0JH

    Single storey rear extension and increase in ridge height of existing rear outrigger (Amended description).

    20 Jul 2026 Lawful development
  • 26/1907/191 Decided

    8 Golders Manor Drive London NW11 9HT

    Use of the property as a self-contained residential unit at ground floor level and the first and second floors as a 4-bedroom, 4-person House in Multiple Occupation (Sui Generis) (AMENDED DESCRIPTION)

    21 May 2026 Lawful development
  • 26/2059/192 Decided

    Low Ridge Rowley Lane Barnet EN5 3HS

    Erection of a rear outbuilding

    3 Jun 2026 Lawful development
  • 26/2066/192 Decided

    355 Hendon Way London NW4 3NB

    Roof extension involving rear dormer window and 3no. front facing rooflights. Removal of chimney on rear elevation (AMENDED DESCRIPTION)

    3 Jun 2026 Lawful development
  • 26/1663/192 Decided

    152 Deans Lane Edgware HA8 9NT

    Change of use from single family dwellinghouse (Class C3a) to supported living accommodation Class C3b)

    5 May 2026 Lawful development