456 Long Lane London N2 8JL

This site has had 2 applications since 2026: 1 approved, 1 refused.

• 26/2154/HSE Refused

  456 Long Lane London N2 8JL

  Single storey rear/side extension

  Decided 12 Aug 2026 Householder

1. 18 Mar 2026

   Received by Barnet

2. 11 May 2026

   Decision issued: Lawful

3. 25 Jul 2026

   Added to PlanIndex

Barnet granted permission on 11 May 2026, 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.

• 456 Long Lane London N2 8JL

  26/2154/HSE Submitted 10 Jun 2026 50 yards away

  Single storey rear/side extension

  Refused Householder Extension 8 docs
  Small domestic

• 18 Trinity Road London N2 8JJ

  25/4320/NMA Submitted 29 Oct 2025 100 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

• 12 Elmfield Road London N2 8EB

  23/3571/192 Submitted 17 Aug 2023 150 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

• 4 - 5 King Street London N2 8DY

  26/3944/NMA Submitted 30 Oct 2026 150 yards away

  65% historically approved · decision due ~25 Dec

  Non-material amendments to planning permission reference 21/0953/FUL dated 19/04/21 for 'Construction of a new roof including increase in ridge height with gable roof feature to front and rear elevations together with 2no dormer windows to rear elevation and one velux window to front elevation to facilitate creation of 1no. self-contained flat with associated parking space, bin store and cycle storage. Alteration to existing front fenestration with provision of Juliette balconies and front porch.' Amendments include changes to the wording of the development description to read, "Construction of a new roof including increase in ridge height with gable roof feature to front and rear elevations together with 2no dormer windows to rear elevation and one velux window to front elevation to facilitate creation of 1no. self-contained flat with bin store and cycle storage. Alteration to existing front fenestration with provision of Juliette balconies and front porch."

  Awaiting decision Amendments Extension Loft or dormer +2
  Small domestic

• 391 Long Lane London N2 8JN

  21/5608/192 Submitted 21 Oct 2021 150 yards away

  Roof extension involving L shaped rear dormer window and 2no front facing rooflights

  Granted Lawful development Extension Loft or dormer +1 20 docs

• Kingsbury King Street London N2 8DY

  21/5282/HSE Submitted 5 Oct 2021 150 yards away

  Part single part two storey rear extension. Single storey side extension

  Granted Householder Extension 29 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