12 Dartmouth Road London NW4 3HU

1. 9 Sep 2025

   Received by Barnet

2. 12 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

• 12 Dartmouth Road London NW4 3HU

  25/3427/HSE Submitted 15 Aug 2025 0m away

  Single storey rear extension with 1no. rooflight

  Granted Householder Extension Loft or dormer 10 docs
  Small domestic

• 20 Dartmouth Road London NW4 3HU

  26/3083/192 Submitted 21 Aug 2026 27m away

  79% historically approved · decision due ~16 Oct

  Roof extension involving rear dormer windows and 3no. front facing rooflights, with internal alterations. (AMENDED)

  Awaiting decision Extension Loft or dormer +1

• 20 Dartmouth Road London NW4 3HU

  26/3084/192 Submitted 21 Aug 2026 27m away

  79% historically approved · decision due ~16 Oct

  Single storey rear extension infill with 2no. rooflights

  Awaiting decision Extension Loft or dormer
  Small domestic

• Flat 1 18 Mount Road London NW4 3PU

  25/4406/FUL Submitted 4 Nov 2025 59m away

  60% historically approved · decision due ~30 Dec

  Change of use of existing ground floor flat from Class C3 single family dwelling to Class C4 house in multiple occupation (HMO) for 3 persons

  Awaiting decision Full applications 7 docs
  Domestic

• 47 Audley Road London NW4 3EX

  26/2511/192 Submitted 3 Jul 2026 90m away

  79% historically approved · decision due ~31 Aug

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

  Awaiting decision Extension Loft or dormer +1

• 30 Audley Road London NW4 3EY

  26/0888/FUL Submitted 9 Mar 2026 129m away

  60% historically approved · decision due ~4 May

  Conversion of an existing dwelling into 2no. self-contained flats. Associated refuse/recycling storage and cycle parking.

  Awaiting decision Full applications New dwelling 15 docs
  Domestic

• 26/2679/192 Decided

  21 Myddelton Park London N20 0JH

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

  20 Jul 2026 Lawful development
• 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