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Planning application

26/1149/192

11 Grove Avenue London N3 1QS

Decided Barnet Proposed Lawful Development Certificate

Proposal

Roof extension involving 1no. rear dormer window over main roof and 1no. rear dormer over outrigger roof with side window and 2no. front facing rooflights.

As published by the council, reference 26/1149/192

Timeline

Dates from the published record

  1. 26 Mar 2026

    Received by Barnet

  2. 30 Mar 2026

    Decision issued: Lawful

  3. 25 Jul 2026

    Added to PlanIndex

After the decision

The process from here

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.

About lawful development applications

How this application type works

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

Nearby applications

Within 500 metres

  • 26/1446/HSE Awaiting decision

    15 Sellers Hall Close London N3 1JL

    Extension of the existing outbuilding and replacement of flat roof with pitched roof to provide loft storage with internal access

    20 Apr 2026 81m away Householder
  • 26/1447/HSE Awaiting decision

    9 Lovers Walk London N3 1JH

    Remodelling of the existing outbuilding including new access steps to garden level and replacement of flat roof with pitched roof to provide loft storage with internal access following removal of the existing wall

    20 Apr 2026 83m away Householder
  • 26/0945/HSE Granted

    37 Cornwall Avenue London N3 1LG

    Single storey rear extension following demolition of the existing sun room. Roof extension involving rear dormer windows and 4no. front facing rooflights

    12 Mar 2026 137m away Householder
  • 26/1247/FUL Awaiting decision

    31A The Grove London N3 1QT

    Roof extension including rear dormer window with juliette balcony and 2no. rear and 4no. front facing rooflights

    1 Apr 2026 140m away Full applications
  • 26/2653/CON Awaiting decision

    Flat 2 202 Nether Street London N3 1JD

    Submission of details of condition 4 (Foundations) pursuant to planning permission 26/1743/FUL dated 06/07/2026

    15 Jul 2026 212m away Conditions
  • 26/1743/FUL Awaiting decision

    Flat 2 202 Nether Street London N3 1JD

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    11 May 2026 256m away Full applications

In Barnet

  • 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