31 Allandale Avenue London N3 3PY

1. 17 Oct 2025

   Received by Barnet

2. 22 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 19 Nov 2025

   Decision issued: Unlawful

4. 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

• 31 Allandale Avenue London N3 3PY

  26/0944/HSE Submitted 12 Mar 2026 4m away

  Two storey side and rear extension with rear balcony with associated privacy screen and balustrade. Insertion of 3no. front facing rooflights.

  Granted Householder Extension Loft or dormer 18 docs
  Domestic

• 31 Allandale Avenue London N3 3PY

  26/1982/CON Submitted 28 May 2026 4m away

  95% historically approved · decision due ~23 Jul

  Submission of details of condition 7 (Levels) 8 (Excavation for Services) 9 (Tree Protection & Method Statement) 10 (Details of Foundations) pursuant to planning permission 26/0944/HSE dated 05/05/2026

  Awaiting decision Conditions Trees 7 docs

• 31 Allandale Avenue London N3 3PY

  25/4892/192 Submitted 5 Dec 2025 4m away

  Erection of a rear outbuilding

  Decided Lawful development 6 docs

• 31 Allandale Avenue London N3 3PY

  26/1837/HSE Submitted 15 May 2026 4m away

  77% historically approved · decision due ~10 Jul

  Two storey side and rear extension with rear balcony with associated privacy screen and balustrade. Insertion of 3no. front facing rooflights

  Awaiting decision Householder Extension Loft or dormer 18 docs
  Domestic

• 31 Allandale Avenue London N3 3PY

  26/2799/CON Submitted 29 Jul 2026 41m away

  79% historically approved · decision due ~23 Sep

  Submission of details of condition 7 (Levels) 8 (Excavation for services) 9 (Tree Protection & Method Statement) 10 (Details of Foundations) pursuant to planning permission 26/1837/HSE dated 07/07/2026

  Awaiting decision Trees

• 1-12 Voysey Close London N3 3TR

  TPP/0004/26 Submitted 4 Jan 2026 157m away

  2 x Dead Birch (applicants ref. Group 1) - Remove. Standing in Group G10 of Tree Preservation Order. 1 x Dead Robinia (applicants ref. T2) -Remove. Standing in Group G10 of Tree Preservation Order.

  Decided Trees 4 docs

• 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
• 26/2025/192 Decided

  18 Hale Drive London NW7 3DU

  Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

  1 Jun 2026 Lawful development