25 Myddelton Park London N20 0JH

1. 21 Oct 2025

   Received by Barnet

2. 30 Oct 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

• 25 Myddelton Park London N20 0JH

  25/4533/HSE Submitted 13 Nov 2025 0m away

  Single storey side/rear extension to create link between existing outbuilding and main dwelling along with new front porch

  Granted Householder Extension 10 docs
  Small domestic

• 21 Myddelton Park London N20 0JH

  26/2679/192 Submitted 20 Jul 2026 36m away

  79% historically approved · decision due ~14 Sep

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

  Awaiting decision Extension Roofing
  Small domestic

• 38 Queens Avenue London N20 0JD

  26/1888/192 Submitted 19 May 2026 125m away

  Roof extension involving rear dormer window with juliette balcony and 3no. front facing rooflights. Erection of a rear outbuilding following removal of the shed

  Decided Lawful development Extension Loft or dormer +1 7 docs
  Small domestic

• 38 Queens Avenue London N20 0JD

  26/1889/PNH Submitted 19 May 2026 125m away

  Single storey rear extension with a proposed maximum depth of 6.0m, maximum height of 3.34m and an eaves height of 3.0m

  Refused Prior approval Extension 10 docs
  Small domestic

• 38 Queens Avenue London N20 0JD

  26/3044/HSE Submitted 19 Aug 2026 133m away

  77% historically approved · decision due ~14 Oct

  Single storey rear extension with 3no. rooflights following demolition of the existing shed and outrigger

  Awaiting decision Householder Extension Loft or dormer +1
  Small domestic

• 38 Queens Avenue London N20 0JD

  26/2558/PNH Submitted 7 Jul 2026 133m away

  57% historically approved · decision due ~1 Sep

  Single storey rear extension with a proposed depth of 5m, maximum height of 3.25m and eaves height of 3m

  Awaiting decision Prior approval Extension
  Small domestic

• 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
• 26/2025/192 Decided

  18 Hale Drive London NW7 3DU

  Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

  1 Jun 2026 Lawful development