40 Oakleigh Avenue London N20 9JJ

This site has had 2 applications since 2026.

• 26/1297/HSE Awaiting decision

  40 Oakleigh Avenue London N20 9JJ

  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

  Submitted 7 Apr 2026 Householder

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   Decision issued: Withdrawn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 Barnet decided it, and is free to submit a revised scheme at any time. More in our guide to what happens after a planning decision.

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.

• 40 Oakleigh Avenue London N20 9JJ

  26/1297/HSE Submitted 7 Apr 2026 50 yards 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 50 yards 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 50 yards 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 50 yards 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 100 yards 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 100 yards away

  88% 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 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