Trehaven St Andrews Close London N12 8BA

1. 25 Nov 2025

   Received by Barnet

2. 26 Nov 2025

   Validated

   Checked as complete and ready for consideration.

3. 9 Dec 2025

   Decision issued: Lawful

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

• Trehaven St Andrews Close London N12 8BA

  TPP/0568/25 Submitted 9 Sep 2025 6m away

  1 x Diseased Deodar Cedar - Remove. Standing in T159 of Tree Preservation Order. (Exempt Work)

  Decided Trees 9 docs

• 10 Squirrels Close London N12 8AY

  25/4379/192 Submitted 3 Nov 2025 35m away

  Single storey rear extension. Roof extension involving hip to gable, rear dormer window and replacement and insertion of 3no. front facing rooflights and new side gable window. Conversion of the existing garage into habitable room, insertion of window to replace garage door. New outbuilding

  Decided Lawful development Extension Loft or dormer +1 14 docs
  Small domestic

• 10 Squirrels Close London N12 8AY

  26/0520/HSE Submitted 10 Feb 2026 35m away

  Single storey rear extension. Roof extension involving hip to gable, rear dormer window reduction, 3no. front facing rooflights and new side gable window. Conversion of the existing garage into habitable room, insertion of window and door to replace garage door. Removal of rear decking and levelling of rear garden (AMENDED DESCRIPTION)

  Granted Householder Extension Loft or dormer +1 15 docs
  Small domestic

• Aldwick Court Sonia Gardens London N12 8BB

  TPP/0740/25 Submitted 5 Nov 2025 91m away

  1 x Sycamore - Reduce overall crown volume by approximately 5 metres (30%) to alleviate mechanical stress and improve balance. Undertake major thinning to reduce wind loading and improve light penetration by 15%. Remove all major dead wood throughout the crown to reduce risk of branch failure. Standing in Group G126 of Tree Preservation Order (amended description)

  Granted Trees 7 docs

• Aldwick Court Sonia Gardens London N12 8BB

  TPP/0789/25 Submitted 21 Nov 2025 92m away

  1 x Sycamore (applicants ref. T4) - Reduce lateral growth by 3 metres to clear building. Standing in Group G126 of Tree Preservation Order.

  Granted Trees 13 docs

• Aldwick Court Sonia Gardens London N12 8BB

  TPP/0619/25 Submitted 25 Sep 2025 92m away

  86% historically approved · decision due ~20 Nov

  1 x Sycamore (applicants ref. T4) - Reduce lateral growth by 3 metres to clear building. Standing in Group G126 of Tree Preservation Order.

  Awaiting decision Trees 4 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