14 Cool Oak Lane London NW9 7BJ

1. 4 Nov 2025

   Received by Barnet

2. 25 Nov 2025

   Decision issued: Lawful

3. 10 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 14 Cool Oak Lane London NW9 7BJ

  26/0159/HSE Submitted 15 Jan 2026 0m 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 0m 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 4m 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 33m away

  77% historically approved · decision due ~16 Jun

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

  Awaiting decision Householder Extension Demolition 14 docs
  Small domestic

• 6 Cool Oak Lane London NW9 7BJ

  26/0516/HSE Submitted 10 Feb 2026 33m 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 77m away

  79% historically approved · decision due ~21 Aug

  Installation of 1no. internally illuminated digital display panel

  Awaiting decision Advertising

• 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