20 Ashurst Road London N12 9AX

1. 14 May 2026

   Received by Barnet

2. 18 May 2026

   Validated

   Checked as complete and ready for consideration.

3. 15 Jun 2026

   Decision issued: Lawful

4. 16 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

• Flat 2 2 Ashurst Road London N12 9AX

  26/1864/FUL Submitted 18 May 2026 57m away

  Roof extension with rear dormer with juliette balcony, outrigger dormer, 2no. side (1 to each side) and 3no. front facing rooflights

  Refused Full applications Extension Loft or dormer 18 docs

• 8 Petworth Road London N12 9HH

  25/3558/PNH Submitted 28 Aug 2025 104m away

  Single storey rear extension with proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 3.00 metres. Following demolition of existing outrigger.

  Withdrawn Prior approval Extension Demolition 9 docs
  Small domestic

• 8 Petworth Road London N12 9HH

  25/3874/HSE Submitted 22 Sep 2025 104m away

  77% historically approved · decision due ~17 Nov

  Single storey rear extension

  Awaiting decision Householder Extension 11 docs
  Small domestic

• 47 Horsham Avenue London N12 9BG

  25/3376/HSE Submitted 12 Aug 2025 107m away

  Single storey rear extension with flat roof and raised rooflight following demolition of existing lean-to extension. Roof extension including 1no. rear dormer window with juliette balcony and 2no. rooflights to front roofslope. Alterations to rear landscaping including new rear patio/paving

  Granted Householder Extension Loft or dormer +2 16 docs
  Small domestic

• 36 Horsham Avenue London N12 9BE

  26/0689/192 Submitted 23 Feb 2026 113m away

  Roof extension involving rear dormer window and 3no. front facing rooflights

  Decided Lawful development Extension Loft or dormer +1 4 docs

• 36 Horsham Avenue London N12 9BE

  26/0690/HSE Submitted 23 Feb 2026 113m away

  Single storey rear extension with new landing area with associated access steps following removal of the existing patio area

  Granted Householder Extension 8 docs
  Small domestic

• 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