16 Sefton Avenue London NW7 3QD Data via plota.co.uk
Proposal
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.20 metres and eaves height of 3.00 metres. Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision between 11 Nov 2026 and 22 Nov 2026, from Barnet's recent extensions.
Documents 7
Statements & assessments 2
Plans & drawings 4
Site constraints 5
Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
Building
From the energy performance certificate lodged in February 2026, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
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Important details
Decision outlook
Day 11 of the 56-day target. Barnet usually decides extensions by day 52.
Plota live figures for extensions decided by Barnet in the last twelve months, from validation. Barnet decision record →
Public comments
No public comments yet.
3 neighbours consulted · Last counted 6 Oct 2026
Consultation & key dates
- Alt. reference
- PP-15253141
- Planning Portal ref
- PP-15253141
- Neighbours
- 29 Sept 2026
- Consultation
- 29 Sept 2026
- Comments by
- 22 Oct 2026
- Statutory expiry
- 9 Nov 2026
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Barnet is faster than most councils at deciding householder applications, ranking #42 out of 296. Only 25% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Barnet is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% approved vs 90% nationally.
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
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16 Sefton Avenue London NW7 3QD
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Comments are open until 22 Oct 2026