391 Long Lane London N2 8JN

1. 21 Oct 2021

   Received by Barnet

2. 22 Oct 2021

   Validated

   Checked as complete and ready for consideration.

3. 19 Nov 2021

   Decision issued: Lawful

4. 7 Sep 2026

   Added to PlanIndex

Barnet granted permission on 19 November 2021, 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.

• 17 New Trinity Road London N2 8EE

  26/1851/192 Submitted 18 May 2026 50 yards away

  Roof extension involving rear dormer with juliette balcony and 1no. rooflight, outrigger dormer, and 3no. front facing rooflights. (amended)

  Granted Lawful development Extension Loft or dormer 7 docs

• 12 Elmfield Road London N2 8EB

  23/3571/192 Submitted 17 Aug 2023 50 yards away

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

  Granted Lawful development Extension Loft or dormer +1 17 docs

• Ground Floor Flat 21 New Trinity Road London N2 8EE

  26/0893/NMA Submitted 9 Mar 2026 50 yards away

  Non material amendment to planning permission 25/3358/FUL dated 06/10/2025 for 'Single storey side/rear extension with 5no. rooflights' Amendments include enclosing the proposed lightwell

  Withdrawn Amendments Extension Loft or dormer 3 docs
  Small domestic

• Ground Floor Flat 21 New Trinity Road London N2 8EE

  25/3358/FUL Submitted 12 Aug 2025 50 yards away

  Single storey rear extension with 5no. rooflights

  Granted Full applications Extension Loft or dormer 7 docs
  Small domestic

• Ground Floor Flat 21 New Trinity Road London N2 8EE

  26/1289/S73 Submitted 7 Apr 2026 50 yards away

  93% historically approved · decision due ~2 Jun

  Variation of condition 1 (Approved plans) pursuant to planning permission 25/3358/FUL dated 06/10/2025 for 'Single storey side/rear extension with 5no. rooflights' Amendments includes removal of the lightwell

  Awaiting decision Conditions Extension Loft or dormer 4 docs
  Small domestic

• 18 Trinity Road London N2 8JJ

  25/4320/NMA Submitted 29 Oct 2025 150 yards away

  Non material amendment to planning permission 23/2747/HSE dated 18/08/2023 for `Part single, part two storey rear extension with 1no. rooflight` Amendments include removal of first floor extension and reduction of ground floor extension footprint

  Granted Amendments Extension Loft or dormer 4 docs

• 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