3a Alexander Road London Colney Hertfordshire AL2 1HR
Refused on 8 July 2026
Council decision: Certificate of Lawfulness Refused1 reason for refusal
Proposal
Certificate of Lawfulness (proposed) - Proposed single storey side extension and loft conversion at 3a Alexander Road London Colney Hertfordshire AL2 1HR
- Ward
- London Colney
- ReceivedSubmitted
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided8 Jul
About this application
This is a planning application for a single storey side extension at 3a Alexander Road London Colney Hertfordshire AL2 1HR. St Albans has handled 12,340 applications of this type. There has been 1 other application at this address. In the past year there have been 56 applications across London Colney. We hold 1,041 applications in total for the AL2 postcode area.
Why it was refused
- A Certificate of Lawfulness (proposed) cannot be issued on the basis that the proposal would fail to comply with permitted development by virtue of the provision of Class B, B.2, b(i), (bb) Part 1, Schedule 2 of the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended. The plans indicate that a distance of less than 0.2m would be achieved from between the edge of the dormer roof enlargement and the eaves. The applicant has not demonstrated that it would not be practicable to achieve a distance of 0.2m. Formal planning permission is therefore required. Christine Traill Strategic Director – Community and Place Delivery Dated 08/07/2026 First Schedule (Development/Use) - Certificate of Lawfulness (proposed) - Proposed single storey side extension and loft conversion Second Schedule (Location) - 3a Alexander Road London Colney Hertfordshire
From the council's decision notice.
Application details
- Postcode
- AL2 1HR
Applicant and agent
- Applicant
- Private applicant
- Agent
- C.Eng MICE MCABE
Site constraints
Designations at the address point. Ones next to the site may also apply.
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (24)
flood storage areas, conservation areas, listed buildings, Article 4 directions, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Planning history at this site
2 other applications at this property, newest first.
- 202631 Jul
Certificate of Lawfulness (proposed) - Proposed single storey side extension and loft conversion
ApprovedCertificate of Lawfulness - (proposed)5/2026/1446 - 202614 Apr
Prior Approval - Single storey rear extension 3m in height x 6m in depth and 2.75m in height to the eaves at…
ApprovedOutline5/2026/0758
Source: St Albans
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Around this site
Nearby applications
- 3A Alexander Road London Colney Hertfordshire Al2 1Hr5/2026/1446 · OutlineApproved0.0 mi
- 90 Cotlandswick London Colney Hertfordshire Al2 1Ef5/2016/2831 · FullApproved0.1 mi
- 11 Cherry Tree Avenue London Colney Hertfordshire Al2 1Rx5/2023/0868 · FullAwaiting decision0.2 mi
- 90 Caledon Road London Colney Hertfordshire Al2 1Pr5/2026/0344 · OutlineApproved0.2 mi
- 3 Cherry Tree Avenue London Colney Hertfordshire Al2 1Ru5/2023/0701 · OutlineAwaiting decision0.2 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- ISS Electrical Contractor & Property Services LtdElectrician0.1 mi
- M & M Gas Services Ltd0.1 mi
- Connect Electrical (St Albans) LTDElectrician0.1 mi
- Brothers ElectricalElectrician0.2 mi
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