41 Lyndhurst Avenue London N12 0LX

1. 18 Aug 2025

   Received by Barnet

2. 9 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

  25/3368/PNH Submitted 12 Aug 2025 173m 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

• 23 Ferncroft Avenue London N12 0LN

  26/0664/HSE Submitted 20 Feb 2026 177m 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

• 28 Hollickwood Avenue London N12 0LT

  26/0509/PNH Submitted 10 Feb 2026 179m 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

• 26 Hollickwood Avenue London N12 0LT

  25/3774/192 Submitted 15 Sep 2025 185m away

  Single storey rear extension with No3 flat rooflights following demolition of existing extension and outbuilding.

  Decided Lawful development Extension Loft or dormer +1 5 docs
  Small domestic

• 9 St Johns Avenue London N11 3BX

  26/3067/192 Submitted 20 Aug 2026 186m away

  79% historically approved · decision due ~15 Oct

  Roof extension with 1no. rear dormer window over main roof and 1no. rear dormer over outrigger roof, 3no. front facing rooflights and new side gable window

  Awaiting decision Extension Loft or dormer +1

• 25 Queens Parade Friern Barnet Road London N11 3DA

  26/1883/CON Submitted 19 May 2026 200m away

  95% historically approved · decision due ~14 Jul

  Submission of details of conditions 4 (Kitchen Extract Equipment) 6 (Kitchen Extraction System plant noise) pursuant to planning permission 26/0252/FUL dated 20/03/2026

  Awaiting decision Conditions 3 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