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Planning application

14 Cool Oak Lane London NW9 7BJ

Granted Barnet 25/4403/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Roof extension involving hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window

As published by the council, reference 25/4403/192

Application record

Reference
25/4403/192
Type
Proposed Lawful Development Certificate
Status
Lawful
Decision
Granted As published: Lawful
Received
4 Nov 2025
Validated
4 Nov 2025
Decided
25 Nov 2025
Ward
West Hendon
Decision by
Delegated Decision
Postcode
NW9 7BJ

Site history

Applications at this address on the Barnet register

This site has had 4 applications since 2025: 3 approved, 0 refused.

  • 26/0972/HSE Granted

    14 Cool Oak Lane London NW9 7BJ

    Part single, part two storey side and rear extension including conversion of garage into habitable room insertion of window to replace garage door

    Decided 11 May 2026 Householder
  • 26/0159/HSE Awaiting decision

    14 Cool Oak Lane London NW9 7BJ

    Part single, part two storey side and rear extension including conversion of the garage into habitable room and replacement of the existing shutter with window. Hip to gable roof extension

    Submitted 15 Jan 2026 Householder
  • 25/4404/PNH Granted

    14 Cool Oak Lane London NW9 7BJ

    Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.31 metres and eaves height of 3.00 metres.

    Decided 9 Dec 2025 Prior approval

Timeline

Dates from the published record

  1. 4 Nov 2025

    Received by Barnet

  2. 25 Nov 2025

    Decision issued: Lawful

  3. 10 Aug 2026

    Added to PlanIndex

Documents

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

5 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 documents

What this grant of permission means

Barnet granted permission on 25 November 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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 0.3 miles

  • 14 Cool Oak Lane London NW9 7BJ

    26/0159/HSE Submitted 15 Jan 2026 50 yards away

    77% historically approved · decision due ~19 Mar

    Part single, part two storey side and rear extension including conversion of the garage into habitable room and replacement of the existing shutter with window. Hip to gable roof extension

    Awaiting decision Householder Extension Loft or dormer +1 7 docs
    Domestic

  • 14 Cool Oak Lane London NW9 7BJ

    26/0972/HSE Submitted 13 Mar 2026 50 yards away

    Part single, part two storey side and rear extension including conversion of garage into habitable room insertion of window to replace garage door

    Granted Householder Extension Windows or glazing 7 docs
    Domestic

  • 14 Cool Oak Lane London NW9 7BJ

    25/4404/PNH Submitted 4 Nov 2025 50 yards away

    Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.31 metres and eaves height of 3.00 metres.

    Granted Prior approval Extension 6 docs
    Small domestic

  • 6 Cool Oak Lane London NW9 7BJ

    26/1467/HSE Submitted 21 Apr 2026 50 yards away

    Single storey side infill extension and single storey rear extension following demolition of existing outbuilding and greenhouse. Single storey front extension

    Refused Householder Extension Demolition 16 docs
    Small domestic

  • 6 Cool Oak Lane London NW9 7BJ

    26/0516/HSE Submitted 10 Feb 2026 50 yards away

    77% historically approved · decision due ~7 Apr

    Single storey side infill extension and single storey rear extension following demolition of existing outbuilding. Single storey front extension

    Awaiting decision Householder Extension Demolition 12 docs
    Small domestic

  • 129 West Hendon Broadway London NW9 7DY

    26/2369/ADV Submitted 22 Jun 2026 50 yards away

    93% historically approved · decision due ~21 Aug

    Installation of 1no. internally illuminated digital display panel

    Awaiting decision Advertising 7 docs

In Barnet

  • 26/2679/192 Granted

    21 Myddelton Park London N20 0JH

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

    Received 20 Jul, published by the council 7 Aug 2026 Lawful development
  • 26/1362/191 Refused

    145 Cotswold Gardens London NW2 1PL

    Use as a House in Multiple Occupation (HMO) for 6 people

    Received 14 Apr, published by the council 25 Jul 2026 Lawful development
  • 26/1907/191 Granted

    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)

    Received 21 May, published by the council 16 Aug 2026 Lawful development
  • 26/2392/192 Refused

    6 Mostyn Road Edgware HA8 0JD

    New front hardstanding and vehicular access to provide off-street parking

    Received 23 Jun, published by the council 9 Aug 2026 Lawful development
  • 26/2059/192 Refused

    Low Ridge Rowley Lane Barnet EN5 3HS

    Erection of a rear outbuilding

    Received 3 Jun, published by the council 16 Aug 2026 Lawful development