Planning application
26/2009/192
12 Marlborough Avenue Edgware HA8 8UH
Proposal
Removal and alteration of existing roof above existing two storey side (Phase 1). Roof extension involving wraparound side and rear dormer windows (Phase 2). (Phase 2 to commence when phase 1 completed)
As published by the council, reference 26/2009/192
Timeline
Dates from the published record
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29 May 2026
Received by Barnet
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25 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Barnet for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
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.
Nearby applications
Within 500 metres
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26/1972/192 Awaiting decision
29 Lynford Gardens Edgware HA8 8TX
Rear pergola
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26/1010/HSE Awaiting decision
5 Lynford Gardens Edgware HA8 8TX
Single storey rear extension with succah roof joining the existing garage and associated alterations to the existing garage
-
26/2665/PNH Awaiting decision
52 Harcourt Avenue Edgware HA8 8YN
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves height of 2.82 metres, following demolition of the existing garage.
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26/1242/HSE Awaiting decision
57 Priory Field Drive Edgware HA8 9PT
Single storey side and rear extension with 3no. rooflights. Changes to front fenestration including replacement of garage doors with windows
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26/2818/PNH Awaiting decision
33 Glengall Road Edgware HA8 8SZ
2no. single storey rear extensions with a proposed depth of 6.00 metres, maximum height of 2.80 metres and eaves height of 2.80 metres, and depth of 2.55 metres, maximum height of 2.80 metres and eaves height of 2.80 metres respectively, following partial demolition of existing outrigger.
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26/0990/192 Decided
71 Highview Avenue Edgware HA8 9TY
Roof extension involving rear dormer window and 2no. front facing rooflights
Other lawful development applications
In Barnet
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26/2836/192 Awaiting decision
20 Derwent Avenue Barnet EN4 8LX
Roof extension involving rear dormer window with juliette balcony
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26/2815/192 Awaiting decision
18 Boyne Avenue London NW4 2JN
Roof extension involving rear dormer window and 2no. front facing rooflights
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26/2824/192 Awaiting decision
41 Greenway Close London N20 8ES
Erection of a rear outbuilding
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26/2809/192 Awaiting decision
43A Clifford Road Barnet EN5 5PD
Single storey rear extension following the demolition of existing canopy
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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