26 Hollickwood Avenue London N12 0LT

1. 15 Sep 2025

   Received by Barnet

2. 18 Sep 2025

   Decision issued: Lawful

3. 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

• 28 Hollickwood Avenue London N12 0LT

  26/0509/PNH Submitted 10 Feb 2026 8m away

  57% historically approved · decision due ~7 Apr

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.20 metres and eaves height of 3.00 metres

  Awaiting decision Prior approval Extension 3 docs
  Small domestic

• 28 Hollickwood Avenue London N12 0LT

  25/3368/PNH Submitted 12 Aug 2025 14m away

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.90 metres with eaves height of 3.00 metres.

  Granted Prior approval Extension 3 docs
  Small domestic

• 2 Hollickwood Avenue London N12 0LT

  26/0377/192 Submitted 2 Feb 2026 100m away

  79% historically approved · decision due ~30 Mar

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

  Awaiting decision Lawful development Extension Loft or dormer +1 4 docs

• 9 Woodleigh Avenue London N12 0LJ

  25/3327/HSE Submitted 11 Aug 2025 172m away

  Single storey ground floor rear infill extensions with new raised decking area and associated access steps. Removal of the first floor bay window. Conversion of the garage in habitable room, insertion of window to replace garage door [Amended Description]

  Granted Householder Extension Windows or glazing 7 docs
  Small domestic

• 41 Lyndhurst Avenue London N12 0LX

  25/3440/192 Submitted 18 Aug 2025 185m away

  Single storey rear extension

  Decided Lawful development Extension 4 docs
  Small domestic

• 23 Ferncroft Avenue London N12 0LN

  26/0664/HSE Submitted 20 Feb 2026 208m away

  Erection of a granny annexe to rear garden with solar panels and rooflights following demolition of the existing garage. Enclosure of the existing front porch. Alterations to the existing front garden levels and boundary treatment. Installation of safety balustrades to existing external stairs

  Refused Householder Extension Loft or dormer +1 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