Planning application
8 Allandale Avenue London N3 3PJ
Works: Extension Small domestic
Read from the description, not a valuation. How we read the register
Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.
Proposal
Single storey rear extension with a proposed depth of 8.00m from original rear wall, maximum height of 3.00m and an eaves height of between 2.77m and 2.83m
As published by the council, reference 26/0629/PNH
Application record
- Reference
- 26/0629/PNH
- Type
- Prior Notification (Householder)
- Status
- Prior Approval Required and Refused
- Decision
- Refused As published: Prior Approval Required and Refused
- Received
- 18 Feb 2026
- Validated
- 19 Feb 2026
- Decided
- 26 Mar 2026
- Ward
- Finchley Church End
- Decision by
- Delegated Decision
- Postcode
- N3 3PJ
Site history
Applications at this address on the Barnet register
This site has had 2 applications since 2026: 0 approved, 2 refused.
-
26/2165/HSE Refused
8 Allandale Avenue London N3 3PJ
Single storey rear extension and pergola. Alterations to the existing terrace area. Changes to rear fenestration
Timeline
Dates from the published record
-
18 Feb 2026
Received by Barnet
-
19 Feb 2026
Validated
Checked as complete and ready for consideration.
-
26 Mar 2026
Decision issued: Prior Approval Required and Refused
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Trevor Brown Architect Agent, an architecture practice registered in London
Active · incorporated 2012 · London
15 applications on PlanIndex · across 5 councils · 69% granted
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
10 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.
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Open the documentsWhat this refusal means
Barnet refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.
About prior approval applications
Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
8 Allandale Avenue London N3 3PJ
Single storey rear extension and pergola. Alterations to the existing terrace area. Changes to rear fenestration
Refused Householder Extension Windows or glazing 8 docsSmall domestic -
Highview Chessington Avenue London N3 3DP
77% historically approved · decision due ~29 Sep
Lower ground floor rear extension to create a terrace to link main house accommodation to garden with rear external access steps and associated rear lightwells. Roof extension involving hip to gable with new mansard roof, with 4no. front facing, 3no rear facing rooflights
Withdrawn Householder Extension Loft or dormerDomestic -
28 Chessington Avenue London N3 3DP
77% historically approved · decision due ~16 Mar
Part single part two-storey rear extension, following removal of the existing shed. Raising of existing lower flat roof to create large crown roof. Roof extension involving side and rear dormer window and 2no. front and 3no. side facing rooflights (AMENDED DESCRIPTION)
Awaiting decision Householder Extension Loft or dormer +1 4 docsSmall domestic -
30 Fairholme Gardens London N3 3EB
77% historically approved · decision due ~23 Feb
Single storey rear extension with 2no. rooflights. Conversion of the existing garage into habitable room, insertion of window to replace the existing garage door
Awaiting decision Householder Extension Loft or dormer +1 8 docsSmall domestic -
30 Fairholme Gardens London N3 3EB
77% historically approved · decision due ~28 May
First floor rear extension. Changes to fenestration
Awaiting decision Householder Extension Windows or glazing 6 docsDomestic -
72-74 Regents Park Road London N3 3JH
93% historically approved · decision due ~14 Nov
Variation of condition 1 (Approved Plans) of planning permission reference 23/4042/FUL dated 30/01/24 for 'Demolition of the existing property and erection of a part three, part four storey building plus basement comprising of nine self-contained flats with car and cycle parking at basement level, refuse/recycling storage, plant room, associated amenity space and landscaping.' Variation to include: Use of ground floor flat roof as terrace for first floor flat; Provision of 1500mm deep cantilevered balcony at second floor level with 1800mm high privacy screen; Use of second floor flat roof as a terrace at third floor level with 1700mm high privacy screen
Awaiting decision Conditions New dwelling Demolition 16 docs
Other prior approval applications
In Barnet
-
26/3835/PNH Awaiting decision
3 Devonshire Crescent London NW7 1DN
Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.48 metres and eaves height of 3.00 metres. Following demolition of existing rear outrigger.
-
26/3832/PNH Awaiting decision
48 Alverstone Avenue Barnet EN4 8EB
Single storey rear extension with a proposed depth of 4.5 metres, maximum height of 3.15 metres and eaves height of 3 metres following demolition of existing rear extension.
-
26/3823/PNH Awaiting decision
7 Southbourne Crescent London NW4 2LB
Single storey rear extension added to an existing extension with the total extension measuring 6.00 metres deep, with a maximum height of 3.00 metres and an eaves height of 3.00 metres.
-
26/3809/PND Awaiting decision
10 Clifford Road Barnet EN5 5PG
Demolition of existing garage
-
26/3819/PNH Awaiting decision
78 Russell Lane London N20 0AP
2no. Single storey rear extensions with a proposed depth of 7.00 metres, maximum height of 3.60 metres and eaves height of 3.00 metres. Following demolition of the existing side/rear outrigger.