124 Firs Avenue London N11 3NQ

1. 26 Aug 2025

   Received by Barnet

2. 29 Aug 2025

   Decision issued: Lawful

3. 10 Aug 2026

   Added to PlanIndex

Barnet granted permission on 29 August 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.

• 76 Firs Avenue London N11 3NQ

  26/2548/HSE Submitted 7 Jul 2026 50 yards away

  Installation of air source heat pump to front elevation

  Refused Householder
  Domestic

• 6 Winterburn Close London N11 3DJ

  25/3834/HSE Submitted 18 Sep 2025 150 yards away

  77% historically approved · decision due ~13 Nov

  Two storey rear extension following demolition of the existing conservatory. Single storey front infill extension

  Awaiting decision Householder Extension Demolition 5 docs
  Small domestic

• 6 Winterburn Close London N11 3DJ

  25/4806/HSE Submitted 1 Dec 2025 150 yards away

  77% historically approved · decision due ~26 Jan

  Single storey front infill extension. Single storey rear extension with 2no. rooflights following demolition of the existing conservatory

  Awaiting decision Householder Extension Loft or dormer +1 5 docs
  Small domestic

• 8A Firs Avenue London N11 3NG

  26/3559/191 Submitted 1 Oct 2026 150 yards away

  79% historically approved · decision due ~26 Nov

  New side porch and canopy with window

  Awaiting decision Extension Windows or glazing
  Small domestic

• 8A Firs Avenue London N11 3NG

  26/2447/191 Submitted 26 Jun 2026 150 yards away

  79% historically approved · decision due ~4 Sep

  New side porch and canopy with window

  Awaiting decision Extension Windows or glazing
  Small domestic

• 50 Ribblesdale Avenue London N11 3BQ

  24/1919/PNH Submitted 16 May 2024 200 yards away

  Single storey rear extension with a proposed depth of 4.12m, maximum height of 2.90m and eaves height of 2.63m, following demolition of existing conservatory

  Granted Prior approval Extension Demolition 8 docs
  Small domestic

• 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