Planning application
37 Cornwall Avenue London N3 1LG
Works: New dwelling Extension Loft or dormer Windows or glazing 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
Conversion of the existing dwelling into 2no. self-contained flats including single storey rear extension with green roof and parapet, front porch infill, first floor rear terrace area with obscure glazing, roof extension involving rear dormer window and 4no. front facing rooflights
As published by the council, reference 25/4558/FUL
Application record
- Reference
- 25/4558/FUL
- Type
- Full Application
- Status
- Refused
- Decision
- Refuse
- Received
- 14 Nov 2025
- Validated
- 17 Nov 2025
- Decided
- 12 Jan 2026
- Ward
- West Finchley
- Decision by
- Delegated Decision
- Postcode
- N3 1LG
Timeline
Dates from the published record
-
14 Nov 2025
Received by Barnet
-
17 Nov 2025
Validated
Checked as complete and ready for consideration.
-
12 Jan 2026
Decision issued: Refuse
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in Ware
38 applications on PlanIndex · across 9 councils · 45% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
12 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 refusal means
The process from here
The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.
Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
-
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
Granted Householder Extension Loft or dormer +2 13 docsSmall domestic -
39 Cornwall Avenue London N3 1LG
79% historically approved · decision due ~16 Feb
Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights
Awaiting decision Lawful development Extension Loft or dormer +1 7 docs -
39 Cornwall Avenue London N3 1LG
77% historically approved · decision due ~12 Nov
Single storey rear extension. Conversion of the existing garage into habitable room, insertion of window to replace the garage door
Awaiting decision Householder Extension Windows or glazing 9 docsSmall domestic -
39 Cornwall Avenue London N3 1LG
77% historically approved · decision due ~27 Oct
New front porch
Awaiting decision Householder ExtensionSmall domestic -
32 Cornwall Avenue London N3 1LG
79% historically approved · decision due ~1 Oct
Conversion of part of the 1st floor and 2nd floor to create 1no. self-contained residential dwelling (Use Class C3)
Awaiting decisionDomestic -
First Floor Flat 33 Grove Avenue London N3 1QS
Change of use of the upper floor flat (Class C3) to a 3 bed House in Multiple Occupation (HMO) (Class C4). Associated refuse/recycling and cycle storage (AMENDED DESCRIPTION)
Refused Full applications 15 docs
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26/3199/FUL Awaiting decision
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26/3200/FUL Awaiting decision
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Removal of front extension. Single storey side extension including new walls to replace existing boundary fences. (Part Retrospective)
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26/3204/FUL Awaiting decision
136 Station Road London N3 2SG
Conversion of existing property into 3no. self-contained flats including: Part single, part two storey rear extension; Roof extension including hip to gable with 1no. rear dormer window, 3no. front facing rooflights and 1no. gable window
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26/3195/FUL Awaiting decision
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