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

Barnet granted permission on 9 September 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 22 - 24 Thurlestone Avenue London N12 0LP

  26/3453/FUL Submitted 22 Sep 2026 150 yards away

  63% historically approved · decision due ~17 Nov

  Single storey extension to the existing rear (Class E) office outbuilding following demolition of existing annexe outbuilding

  Awaiting decision Full applications Extension Demolition
  Small domestic

• 28 Hollickwood Avenue London N12 0LT

  25/3368/PNH Submitted 12 Aug 2025 200 yards 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 200 yards 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 200 yards away

  56% 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 200 yards away

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

  Granted 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 200 yards 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

• 26/2679/192 Granted

  21 Myddelton Park London N20 0JH

  Single storey rear extension and increase in ridge height of existing rear outrigger (Amended description).

  Received 20 Jul, published by the council 7 Aug 2026 Lawful development
• 26/1362/191 Refused

  145 Cotswold Gardens London NW2 1PL

  Use as a House in Multiple Occupation (HMO) for 6 people

  Received 14 Apr, published by the council 25 Jul 2026 Lawful development
• 26/1907/191 Granted

  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)

  Received 21 May, published by the council 16 Aug 2026 Lawful development
• 26/2392/192 Refused

  6 Mostyn Road Edgware HA8 0JD

  New front hardstanding and vehicular access to provide off-street parking

  Received 23 Jun, published by the council 9 Aug 2026 Lawful development
• 26/2059/192 Refused

  Low Ridge Rowley Lane Barnet EN5 3HS

  Erection of a rear outbuilding

  Received 3 Jun, published by the council 16 Aug 2026 Lawful development