4 Collens Road Harpenden Hertfordshire AL5 2AJ Data via plota.co.uk
Proposal
Certificate of Lawfulness (proposed) - Single Storey Rear Extension Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision between 13 Nov 2026 and 8 Dec 2026, from St Albans's recent extensions.
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, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) 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.
Sales history 2
Last sold for £1,322,500 in February 2026. Detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in May 2025, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
Every application in St Albans - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
Decision outlook
Day 50 of the 56-day target. St Albans usually decides extensions by day 77.
Plota live figures for extensions decided by St Albans in the last twelve months, from validation. St Albans decision record →
Public comments
No public comments yet.
Last counted 28 Oct 2026
Consultation & key dates
- Alt. reference
- 323727PLN
- Planning Portal ref
- 15211782
- Comments by
- 9 Oct 2026
- Statutory expiry
- 3 Nov 2026
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
St Albans is one of the slowest councils in England for householder decisions, ranking #285 out of 296. The council extends the time limit on 64% of applications - one of the highest rates in England. Expect your application to take longer than the standard deadline. Householder applications are slightly less likely to be approved here (88%) than the national average (90%).
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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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4 Collens Road Harpenden Hertfordshire AL5 2AJ
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The consultation period closed on 9 Oct 2026.