Planning application
St Bees Day House Mill Hill School The Ridgeway London NW7 1QS
Works: Extension Demolition
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Two storey side extension with associated internal alterations for use as a Junior Boarding House for up to 30 boarders incorporating the existing staff flat at second floor level following demolition of existing side extension and outbuilding (Amended plans and description)
As published by the council, reference 25/3456/FUL
Application record
- Reference
- 25/3456/FUL
- Type
- Full Application
- Status
- Approved subject to conditions
- Decision
- Approve subject to conditions
- Received
- 19 Aug 2025
- Validated
- 19 Aug 2025
- Decided
- 19 Dec 2025
- Ward
- Mill Hill
- Decision by
- Delegated Decision
- Postcode
- NW7 1QS
Timeline
Dates from the published record
-
19 Aug 2025
Received by Barnet
-
19 Dec 2025
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, registered in Mobberley
13 applications on PlanIndex · across 4 councils · 100% 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
32 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
-
St Bees Day House Mill Hill School The Ridgeway London NW7 1QS
95% historically approved · decision due ~2 Apr
Submission of details of conditions 3 (Materials), 4 (Biodiversity Net Gain Plan), 5 (Precautionary Working Method Statement), 6 (Demolition), 9 (Hedgehog Highways) and 10 (Ecological Enhancements) pursuant to planning permission 25/3456/FUL dated 19/12/25
Awaiting decision Conditions Demolition 5 docs -
-
Winterstoke House And Grimsdell Pre-Preparatory School Wills Grove London NW7 1QR
1 x Silver Birch (applicants ref. T054) - Fell. 1 x Lawson Cypress (applicants ref. T058) - Fell. 1 x Mulberry (applicants ref. T060) - Crown reduce by 2 metres.
Decided Trees 10 docs -
Rosebank Barn The Ridgeway London NW7 1QX
79% historically approved · decision due ~25 Aug
1 x Horse Chestnut (applicants ref. T1) -Crown thin by 20%. 1 x Conifer (applicants ref. T2) - Reduce by 3 metres. 1 x Conifer (applicants ref. T3) - Reduce by 3 metres. 1 x Thin by 20% and reduce by 3 metres. 1 x Conifer (applicants ref. T6) - Reduce by 3 metres. 1 x Alder (applicants ref. T7) - Thin by 20% and reduce by 3 metres in height. 1 x Ash (applicants ref. T8) - Thin by20% and reduce by 3 metres in height. 1 x Twin Stem Sycamore (applicants ref. T9) - Thin crown by 20% and reduce by 3 metres in height. 1 x Dead Tree (applicants ref. T10) - Fell to ground level. Ash Group (applicants ref. T11) - Thin crown by 20% and reduce by 2 metres. 1 x Dead Tree (applicants ref. T12) - Remove.
Awaiting decision Trees -
Kingshead The Ridgeway London NW7 1QX
79% historically approved · decision due ~13 Aug
1 x Hornbeam (applicants ref. T4 on Plan and Schedule) - Reduce to 7 metres in height and 5 metres spread.
Awaiting decision -
Kingshead The Ridgeway London NW7 1QX
79% historically approved · decision due ~9 Sep
1 x Twin Stemmed Lime (applicants ref. T1) - Reduce by 3m and thin by 20%. 1 x Ash (applicants ref. T2) - Reduce by 3m and thin by 20%. 1 x Field Maple (applicants ref. T3) - Reduce by 30% and thin by 20%. 2 x Ash (applicants ref. T4, T5) - Reduce to previous pollard points and thin crown density by 30%.
Awaiting decision Trees
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