40 Oakleigh Avenue London N20 9JJ

1. 19 May 2026

   Received by Barnet

2. 22 May 2026

   Validated

   Checked as complete and ready for consideration.

3. 17 Jul 2026

   Decision issued: Withdrawn

4. 16 Aug 2026

   Added to PlanIndex

The applicant withdrew this application before the council decided it, so it carries no planning weight and no fee refund is automatic. Withdrawal often follows officer feedback that a refusal was likely.

The applicant is free to submit a revised application at any time, and many withdrawn schemes return in amended form, so the site is worth watching if the proposal affected you.

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

• 40 Oakleigh Avenue London N20 9JJ

  26/1297/HSE Submitted 7 Apr 2026 0m away

  77% historically approved · decision due ~3 Jun

  Roof extension involving hip to gable, 3no. rear box dormers with juliette balcony to middle dormer, 3no. front facing rooflights and new side gable window

  Awaiting decision Householder Extension Loft or dormer +1 5 docs
  Domestic

• 36 Oakleigh Avenue London N20 9JJ

  25/4312/HSE Submitted 28 Oct 2025 25m away

  Two storey front extension. Extensions and alterations to existing roof form, new gable ends and 2no. front facing rooflights

  Refused Householder Extension Loft or dormer 9 docs
  Domestic

• 30 Oakleigh Avenue London N20 9JH

  TPP/0714/25 Submitted 28 Oct 2025 64m away

  1 x Large Oak - Remove the two lowest branches and trunk growth. Remove major dead wood. Standing in Group G124 of Tree Preservation Order.

  Granted Trees 4 docs

• 30 Oakleigh Avenue London N20 9JH

  TPP/0760/25 Submitted 14 Nov 2025 66m away

  1 x Large Oak - Remove three large dead branches in the low/mid canopy overhanging the neighbouring garden. Standing in Group G124 of Tree Preservation Order. (Exempt works)

  Decided Trees 4 docs

• 59 Oakleigh Avenue London N20 9JG

  26/0245/HSE Submitted 22 Jan 2026 79m away

  77% historically approved · decision due ~20 Mar

  Single storey rear extension with two lantern rooflights, first floor side extension above the existing garage, and infill extension to the front between the garage and main dwelling at ground level. Extension to the existing second floor with associated roof alterations including 2no. side and 2no. front facing rooflights and new lantern rooflight. Re-location of existing windows and removal of chimney stack on side elevation

  Awaiting decision Householder Extension Loft or dormer +2 4 docs
  Small domestic

• 61 Oakleigh Avenue London N20 9JG

  TPP/0772/25 Submitted 18 Nov 2025 99m away

  86% historically approved · decision due ~13 Jan

  1 x Weeping Willow (applicants ref. T1) - Remove deadwood throughout. Standing in T186 of Tree Preservation Order. 5 x London Plane (applicants ref. T3) - Reduce height by circa 1 metre, remove lower growth that isn't providing screen and is encroaching on lawn. Retain all other centre screening. Standing in Group G118 of Tree Preservation Order.

  Awaiting decision Trees 3 docs

• 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