26/1152/192

1. 26 Mar 2026

   Received by Barnet

2. 23 Apr 2026

   Decision issued: Unlawful

3. 25 Jul 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

• 26/2784/HSE Awaiting decision

  106 Longland Drive London N20 8HL

  Alterations to existing garage including single storey front extension, increase in height of roof and conversion into habitable room. First floor side extension. New front Porch. Changes to fenestration

  28 Jul 2026 151m away Householder
• 26/2782/PNH Awaiting decision

  106 Longland Drive London N20 8HL

  Single storey rear extension with a proposed maximum depth of 8.00 metres, maximum height of 3.30 metres and eaves height of 3.00 metres, following demolition of the existing conservatory.

  28 Jul 2026 151m away Prior approval
• 26/2783/192 Awaiting decision

  106 Longland Drive London N20 8HL

  Roof extension involving hip to gable, rear dormer window with juliette balcony and new side gable windows. Erection of a rear outbuilding

  28 Jul 2026 151m away Lawful development
• 26/1576/HSE Awaiting decision

  51 Ventnor Drive London N20 8BU

  Single storey side/rear extension. Conversion of the existing garage into habitable room, insertion of window to replace garage door.

  27 Apr 2026 231m away Householder
• 26/1432/192 Decided

  69 Southway London N20 8DE

  Roof extension involving hip to gable, rear dormer window, 3no. front facing rooflights, 1no. rooflight sited on flat roof and 2no. side gable windows. Demolition of chimney. (amended)

  17 Apr 2026 236m away Lawful development
• 26/2100/HSE Awaiting decision

  69 Southway London N20 8DE

  Part single, part two storey rear extension with new raised patio/terrace to the rear with access steps/privacy screen and 4no. rooflights. Extension and conversion of garage into habitable room, insertion of door to replace garage door with 2 no. rooflights. Roof extension involving hip to gable, rear dormer window, 3no. front facing rooflights, 1no. top facing rooflight and 2no. side gable windows following the demolition of existing chimney

  5 Jun 2026 241m away Householder

• 26/2836/192 Awaiting decision

  20 Derwent Avenue Barnet EN4 8LX

  Roof extension involving rear dormer window with juliette balcony

  31 Jul 2026 Lawful development
• 26/2815/192 Awaiting decision

  18 Boyne Avenue London NW4 2JN

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

  30 Jul 2026 Lawful development
• 26/2824/192 Awaiting decision

  41 Greenway Close London N20 8ES

  Erection of a rear outbuilding

  30 Jul 2026 Lawful development
• 26/2809/192 Awaiting decision

  43A Clifford Road Barnet EN5 5PD

  Single storey rear extension following the demolition of existing canopy

  29 Jul 2026 Lawful development
• 26/2806/192 Awaiting decision

  14 Lincoln Road London N2 9DL

  Roof extension involving 1no. rear dormer window over main roof with juliette balcony and 1no. rear dormer over outrigger roof and 3no. front facing rooflights. Alterations to existing lean-to to form rear extension with flat roof with parapet walls and 1no. skylight. Alterations to fenestration and doors

  29 Jul 2026 Lawful development