Planning application
40 Oakleigh Avenue London N20 9JJ
Works: Extension Loft or dormer Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Roof extension involving hip to gable, 3no. rear box dormers with juliette balcony to middle dormer, 3no. front facing rooflights and new side gable window
As published by the council, reference 26/1297/HSE
Application record
- Reference
- 26/1297/HSE
- Type
- Householder Application
- Status
- Pending Consideration
- Received
- 7 Apr 2026
- Validated
- 8 Apr 2026
- Ward
- Whetstone
- Postcode
- N20 9JJ
Site history
Applications at this address on the Barnet register
This site has had 2 applications since 2026.
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26/1878/192 Withdrawn
40 Oakleigh Avenue London N20 9JJ
Erection of a garden room
Timeline
Dates from the published record
-
7 Apr 2026
Received by Barnet
-
8 Apr 2026
Validated
Checked as complete and ready for consideration.
-
25 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 3 June 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.
Who's behind it
Company information only, from the register and Companies House
Method Studio Architecture Ltd Agent, an architecture practice registered in Chelmsford
Active · incorporated 2015 · Chelmsford
11 applications on PlanIndex · across 6 councils
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
5 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 householder applications in a median of 56 days. More in our guide to how long planning decisions take.
About householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 500 metres
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36 Oakleigh Avenue London N20 9JJ
Two storey front extension. Extensions and alterations to existing roof form, new gable ends and 2no. front facing rooflights
Refused Householder Extension Loft or dormer 9 docsDomestic -
30 Oakleigh Avenue London N20 9JH
1 x Large Oak - Remove the two lowest branches and trunk growth. Remove major dead wood. Standing in Group G124 of Tree Preservation Order.
Granted Trees 4 docs -
30 Oakleigh Avenue London N20 9JH
1 x Large Oak - Remove three large dead branches in the low/mid canopy overhanging the neighbouring garden. Standing in Group G124 of Tree Preservation Order. (Exempt works)
Decided Trees 4 docs -
59 Oakleigh Avenue London N20 9JG
77% historically approved · decision due ~20 Mar
Single storey rear extension with two lantern rooflights, first floor side extension above the existing garage, and infill extension to the front between the garage and main dwelling at ground level. Extension to the existing second floor with associated roof alterations including 2no. side and 2no. front facing rooflights and new lantern rooflight. Re-location of existing windows and removal of chimney stack on side elevation
Awaiting decision Householder Extension Loft or dormer +2 4 docsSmall domestic -
61 Oakleigh Avenue London N20 9JG
87% historically approved · decision due ~13 Jan
1 x Weeping Willow (applicants ref. T1) - Remove deadwood throughout. Standing in T186 of Tree Preservation Order. 5 x London Plane (applicants ref. T3) - Reduce height by circa 1 metre, remove lower growth that isn't providing screen and is encroaching on lawn. Retain all other centre screening. Standing in Group G118 of Tree Preservation Order.
Awaiting decision Trees 3 docs
Other householder applications
In Barnet
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26/3422/HSE Awaiting decision
Revelstroke 28 Totteridge Village London N20 8JN
Construction of a swimming pool and associated hard and soft landscaping following demolition of the existing shed including new access steps. Alterations to the ground level. Replacement of an existing timber decking terrace with a paved terrace.
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26/3396/HSE Awaiting decision
43 Dukes Avenue London N3 2DE
Single storey rear, part two storey side extension with 1no. rooflight following the demolition of existing shed. Roof extension with rear dormer window, 1no. front, 3no. side facing rooflights and roof windows to the front and side roof slopes. Installation of solar panels to side elevation of roof
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26/3410/HSE Awaiting decision
54 Ferney Road Barnet EN4 8LE
Single storey rear extension with alteration to the raised terrace area including new access steps to garden
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26/3415/HSE Awaiting decision
11 Downage London NW4 1AS
Alterations and extensions to the roof including rear dormer window and the partial removal of the roof of the first floor rear extension, creation of a new crown roof over main roof and rear extension, 1no. front, 1no. side, 1no. rear facing rooflight and 1no. on crown roof
-
26/3382/HSE Awaiting decision
11 Layfield Crescent London NW4 3UJ
Part single, part two storey rear extension with flat roof and 1no. skylight