Planning application
31 Sefton Avenue London NW7 3QB
Works: Extension Loft or dormer Roofing Windows or glazing
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Non material amendment to planning permission 25/3239/HSE dated 01/10/2025 for 'First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the juliette balcony and 3no. front facing rooflights. Changes to roof tiles and fenestration' Amendments includes removal of existing chimney and adjustment to front facing rooflights
As published by the council, reference 25/5113/NMA
Application record
- Reference
- 25/5113/NMA
- Type
- Non Material Amendment
- Status
- Approved
- Decision
- Approve
- Received
- 19 Dec 2025
- Validated
- 19 Dec 2025
- Decided
- 5 Jan 2026
- Ward
- Edgware
- Decision by
- Delegated Decision
- Postcode
- NW7 3QB
Timeline
Dates from the published record
-
19 Dec 2025
Received by Barnet
-
5 Jan 2026
Decision issued: Approve
-
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
5 applications on PlanIndex · across 2 councils
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See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
9 documents on file for this application
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Open the documentsWhat this grant of permission means
Barnet granted permission on 5 January 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
29 Sefton Avenue London NW7 3QB
Roof extension involving removal of the existing side and rear dormer window and new hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window. Demolition of the existing chimney. Single storey front porch extension. Demolition of the existing garage. Alterations to the existing driveway including removal of side boundary wall
Decided Lawful development Extension Loft or dormer +2 15 docsSmall domestic -
29 Sefton Avenue London NW7 3QB
Roof extension involving removal of the existing side and rear dormer window and new hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window. Demolition of the existing chimney. Single storey front porch extension. Demolition of the existing garage. Alterations to the existing driveway including removal of side boundary wall
Decided Lawful development Extension Loft or dormer +2 17 docsSmall domestic -
63 Sefton Avenue London NW7 3QE
58% historically approved · decision due ~14 Aug
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 2.50 metres.
Awaiting decision Prior approval Extension 11 docsSmall domestic -
63 Sefton Avenue London NW7 3QE
58% historically approved · decision due ~1 Jul
Single storey rear extension with a proposed maximum depth of 6.00 metres, maximum height of 4.00 metres and an eaves height of 2.40m
Awaiting decision Prior approval Extension 10 docsSmall domestic -
63 Sefton Avenue London NW7 3QE
Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window
Decided Lawful development Extension Loft or dormer +1 11 docs -
63 Sefton Avenue London NW7 3QE
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.50 metres and eaves height of 3.00 metres
Refused Prior approval Extension 13 docsSmall domestic
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26/3021/NMA Awaiting decision
Granville Road Estate Granville Road London NW2 2LD
Non-material amendments to appeal reference APP/N5090/W/15/3132049 (planning reference F/04474/14 dated 08/08/2016 for 'Demolition of Beech Court, garages and other ancillary buildings and the erection of new buildings (including an extension to Nant Court) between two and six storeys in height (with additional basement levels in places) to provide 132 new dwellings in total (all use class C3), comprising 74 flats and 58 houses, together with associated reconfiguration of the site access arrangements and alterations to parking, landscaping, refuse, recycling and other storage facilities and the provision of new play and communal amenity space' Amendments include approved brick faced concrete retaining wall with coping stones and timber fence be replaced with a steel post and precast concrete panel 'King Post' retaining wall system
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26/3009/NMA Awaiting decision
45 Corringham Road London NW11 7BS
Non material amendment to planning permission 25/5034/HSE dated 07/05/2026 for 'First and second storey side extension with gabled roof end . Alterations to existing ground floor side extension. New 2 nos. front rooflights. New rear dormer window to replace existing dormer. Alterations to rear facade with new double glazed windows and doors and removal of rear bay window. Changes to fenestration. (Amended Description and Plans)'. Amendments includes changes to window openings
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26/2959/NMA Awaiting decision
Donoghue Business Park Claremont Road London NW2 1RR
Application pursuant to Section 96A of the Town and Country Planning Act for non-material amendments to Reserved Matters Approval 22/5238/RMA dated 05/05/2023 (as amended by 23/4874/NMA dated 16/01/2024, 24/0328/NMA dated 15/03/2024, 25/0393/NMA dated 25/09/2025, and 26/2935/NMA dated 28/08/2026) for the development of Plots 31, 36 & 61 within the Phase 3B sub-phase pursuant to Section 73 planning permission F/04687/13 dated 23/07/2014 (as amended) for the comprehensive mixed-use redevelopment of the Brent Cross Cricklewood Regeneration Area. Amendments are sought to the requirements of Condition 12 (Mechanical Ventilation & Heat Recovery).
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26/2935/NMA Awaiting decision
Donoghue Business Park Claremont Road London NW2 1RR
Application pursuant to Section 96A of the Town and Country Planning Act for non-material amendments to Reserved Matters Approval 22/5238/RMA dated 05/05/2023 (as amended by 23/4874/NMA dated 16/01/2024, 24/0328/NMA dated 15/03/2024, and 25/0393/NMA dated 25/09/2025) for the development of Plots 31, 36 & 61 within the Phase 3B sub-phase pursuant to Section 73 planning permission F/04687/13 dated 23/07/2014 (as amended) for the comprehensive mixed-use redevelopment of the Brent Cross Cricklewood Regeneration Area. Amendments are sought to the requirements of Condition 17 (Emergency Diesel Generator).
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26/2893/NMA Awaiting decision
52 Hodford Road London NW11 8NJ
Non material amendment to planning permission 25/2474/HSE dated 17/06/2025 for 'Part single, part two storey side and rear extension. Front extension and conversion of the existing garage into habitable room, including insertion of window and door to replace garage door. Replacement of existing windows. Roof extension involving rear dormer window.'. Amendments includes changing material of proposed extension to traditional brick red and reconciling the window dimensions, to balance the rear elevation to have equal sized windows