Planning application
21 Marne Avenue London N11 1JU
Works: Extension Loft or dormer Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Roof extension involving rear dormer window and 2no. front facing rooflights
As published by the council, reference 26/1800/192
Application record
- Reference
- 26/1800/192
- Type
- Proposed Lawful Development Certificate
- Status
- Pending Consideration
- Received
- 13 May 2026
- Validated
- 13 May 2026
- Ward
- Brunswick Park
- Postcode
- N11 1JU
Timeline
Dates from the published record
-
13 May 2026
Received by Barnet
-
25 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 8 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Barnet took a median of 44 days over the applications it decided in the last year.
Documents
Plans, drawings, consultee responses and the officer's report
8 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat happens while it is decided
This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.
About lawful development applications
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.
Nearby applications
Within 500 metres
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88 Oakleigh Road South London N11 1LB
Change of use of rear garden home office from (Class C3) to Estate Agent Office (Class E)
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118 Oakleigh Road South London N11 1LB
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Submission of details of condtion 9 (Hard and soft landscaping) pursuant to planning permission 24/3707/FUL dated 28/03/2025
Awaiting decision Conditions 3 docs -
46 Falkland Avenue London N11 1JS
Roof extension involving rear dormer window and 2no. front facing rooflights
Granted Lawful development Extension Loft or dormer +1 13 docs -
Small domestic
-
103 Brunswick Park Road London N11 1JT
58% historically approved · decision due ~10 Nov
Single storey rear extension with a proposed depth of 6 metres, maximum height of 4 metres and eaves height of 3 metres. Following demolition of the existing garage.
Awaiting decision Prior approval Extension DemolitionSmall domestic -
Benjamin House 92 Brunswick Park Road London N11 1JJ
61% historically approved · decision due ~18 Aug
Conversion and side extension of the existing garage to provide 1no. self-contained flat, replacement of the existing garage door with windows. Associated cycle parking and amenity space. New front hardstanding and vehicular access to provide additional off-street parking
Awaiting decision Full applications Extension Windows or glazing 12 docs
Other lawful development applications
In Barnet
-
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).
-
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)
-
26/2059/192 Refused
Low Ridge Rowley Lane Barnet EN5 3HS
Erection of a rear outbuilding
-
26/2066/192 Granted
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)
-
26/2525/192 Granted
39 Ridgeway Avenue Barnet EN4 8TN
Single storey rear extension