Planning application
21 Colindale Avenue London NW9 5DS
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Erection of a single storey rear extension and reconfiguration of the internal layout of the commercial unit, including partial alteration of the existing single storey roof to form two internal courtyards with associated flank door openings and 2no rooflights
As published by the council, reference 26/0607/FUL
Application record
- Reference
- 26/0607/FUL
- Type
- Full Application
- Status
- Approved subject to conditions
- Decision
- Approve subject to conditions
- Received
- 17 Feb 2026
- Validated
- 4 Mar 2026
- Decided
- 28 Apr 2026
- Ward
- Colindale South
- Decision by
- Delegated Decision
- Postcode
- NW9 5DS
Timeline
Dates from the published record
-
17 Feb 2026
Received by Barnet
-
4 Mar 2026
Validated
Checked as complete and ready for consideration.
-
28 Apr 2026
Decision issued: Approve subject to conditions
-
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 London
13 applications on PlanIndex · across 2 councils
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 a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
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
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55 Annesley Avenue London NW9 5EG
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55A Colindale Avenue London NW9 5EP
61% historically approved · decision due ~13 Feb
Single storey rear extension. Roof extension involving rear dormer window and 1no. front facing rooflight
Awaiting decision Full applications Extension Loft or dormer +1 11 docsSmall domestic -
5 Ajax Court Colindale Avenue London NW9 5EU
61% historically approved · decision due ~15 Jul
New front hardstanding and vehicular access to provide off-street parking. Associated landscaping work
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5 Cecil Road London NW9 5EL
Single storey rear extension with a proposed depth of 4.00 metres, maximum height of 3.20 metres and eaves height of 2.90 metres. Following demolition of existing conservatory.
Granted Prior approval Extension Demolition 7 docsSmall domestic -
Communicable Disease Surveillance Centre 61 Colindale Avenue London NW9 5EQ
79% historically approved · decision due ~31 Aug
1 x Wild Cherry (applicants ref. T20) - Prune to clear structures by 1m. Prune crown to clear wooden beam structure by entrance to building and lamp. Standing in Area A1 of Tree Preservation Order. 1 x Wild Cherry (applicants ref. T23) - Fell to just above ground level. Standing in Area A1 of Tree Preservation Order. 1 x Japanese Flowering Cherry (applicants ref. T24) - Prune to clear structure by 1m. Standing in Area A1 of Tree Preservation Order. 1 x Japanese Flowering Cherry (applicants ref. T25) - Prune to clear structure 1m. Prune crown to clear wooden beam structure. Standing in Area A1 of Tree Preservation Order. 1 x Japanese Flowering Cherry (applicants ref. T31) - Remove broken/hanging branch. Standing in Area A1 of Tree Preservation Order. 1 x Lombardy Poplar (applicants ref. T58) - Fell to ground level, leave 1m stump and stack cuttings near stump for biodiversity value. Standing in Area A1 of Tree Preservation Order. 1 x Lombardy Poplar (applicants ref. T60) - Fell to ground level. Standing in Area A1 of Tree Preservation Order. 1 x Lombardy Poplar (applicants ref. T61) - Fell to ground level. Standing in Area A1 of Tree Preservation Order. 1 x Lombardy Poplar (applicants ref. T62) - Fell to ground level. Standing in Area A1 of Tree Preservation Order. 1 x Silver Birch (applicants ref. T65) - Fell to ground level. Standing in Area A1 of Tree Preservation Order. 1 x Weeping Willow (applicants ref. T82) - Prune to clear structure by 1m. Standing in Area A1 of Tree Preservation Order. 1 x Lombardy Poplar (applicants ref. T95) - Clear vegetation to allow access to basal areas of trees for inspection purposes. Standing in Area A1 of Tree Preservation Order.
Awaiting decision Trees -
Communicable Disease Surveillance Centre 61 Colindale Avenue London NW9 5EQ
79% historically approved · decision due ~28 Sep
2 x Willow (applicants ref. T1, T2) - Remove snapped branches. Standing in Area A1 of Tree Preservation Order. Exempt Work
Awaiting decision Trees
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26/3199/FUL Awaiting decision
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Demolition of the existing dwelling and erection of a two storey building over basement car park with rooms in the roofspace to provide 6no. self-contained residential dwellings. Associated amenity space, cycle stores and refuse/recycling storage
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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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26/3205/FUL Awaiting decision
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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
128 - 130 Woodfield Drive Barnet EN4 8PB
Creation of new vehicle hardstanding and vehicular access to provide off-street parking, with associated retaining walls, steps, railings, landscaping and electric vehicle charging points to both properties. (Part Retrospective Application)