20 St Alphege Road London N9 8BX
Refused on 15 October 2026
Delegated (officer decision)4 reasons for refusal
Boundary © HM Land Registry, © Ordnance Survey · details
This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.
Proposal
Change of use from Use Class C3 (dwelling house) to Use Class C4 (HMO-house in multiple occupation) and single storey rear extension, rear dormer with front roof lights, involving associated amenity, cycle and refuse storage.
- Submitted
- 20 August 2026
- Decision level
- Delegated (officer decision)
- Council
- London Borough of Enfield
- ReceivedSubmitted20 Aug
- ValidatedValidated20 Aug
- Consult.Consultation
- TargetTarget Date
- DecidedDecided15 Oct
Decided in 56 days (council typically 49)
About this application
This is a full planning application for a single storey rear extension at 20 St Alphege Road London N9 8BX. Enfield has handled 1,569 applications of this type. This one was decided in 56 days, 7 days longer than Enfield's typical decision time. The site is in a conservation area. There have been 5 other applications at this address. In the past year there have been 168 applications across Jubilee. We hold 1,113 applications in total for the N9 postcode area.
72% of full applications at London Borough of Enfield were approved. Across all application types, the council typically decides in about 7 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Why it was refused
- The proposed House in Multiple Occupation (HMO), by reason of its poor internal layout, the need for reconfiguration of the communal accommodation to achieve an acceptable means of escape, the consequent reduction in the quality of outlook and natural light available to future occupiers, and the introduction of steps and changes in floor level that would impede step-free movement through the property, would fail to provide a satisfactory standard of residential accommodation for future occupiers. The proposal would result in accommodation that is neither inclusive nor readily accessible and would therefore be contrary to the National Planning Policy Framework (2026), Policies D5, D6 and D7 of the London Plan (2021) and Policies DMD 8 and DMD 37 of the Enfield Development Management Document (2014).
- The proposed development, by reason of the siting of ground floor bedrooms within an area at risk of surface water flooding, has failed to demonstrate that the development would be safe from flooding over its lifetime. In particular, the submitted Flood Risk Assessment does not satisfactorily address the required finished floor levels and flood resilience measures. The proposal is therefore contrary to the National Planning Policy Framework (2026), Policies SI12 and SI13 of the London Plan (2021) and Policies DMD59, DMD61 and DMD62 of the Enfield Development Management Document (2014).
- The proposed development fails to provide adequate and policy compliant cycle parking, by reason of the convoluted and impractical route through the dwelling and the absence of satisfactory external access. The proposal would therefore fail to provide a secure and convenient cycle parking facility and would not promote sustainable modes of transport, contrary to the National Planning Policy Framework (2026), Policies T4 and T5 of the London Plan (2021), Core Policy 25 of the Enfield Core Strategy (2010), and Policies DMD45 and DMD47 of the Enfield Development Management Document (2014).
- In the absence of evidence to demonstrate that there is sufficient capacity to accommodate the parking demand, the proposed development would increase car parking pressure within the vicinity of the site, contrary to the National Planning Policy Framework (2026), Policies DMD 5 and DMD 45 of the Development Management Document (2014) and Policies T6 and T6.1 of the London Plan (2021).
From the council's decision notice.
Application details
- Postcode
- N9 8BX
- Application type
- Full
- Scale / size
- Small
Planning application dates
- Date validated
- 20 August 2026
- Consultation expiry
- 17 September 2026
Applicant and agent
- Architect profile
- REDWOODS PROJECTS LTD
Site constraints
Designations that overlap or adjoin the site outline.
- Article 4 direction: Borough wide
- Flood zone 1: Low probability (rivers and sea)
Possibly incomplete for this council: tree preservation orders.
Also checked, none recorded (22)
flood storage areas, conservation areas, listed buildings, 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.
Associated applications
- 202624 Aug
Single-storey rear extension 6m deep x 4m high (3m high to eaves).
RefusedOutlineFiled alongside26/03569/PRH - 202620 Aug
Change of use from Use Class C3 (dwelling house) to Use Class C4 (HMO-house in multiple occupation) and…
This applicationRefusedFull26/03537/FUL
Planning history at this site
4 other applications at this property, newest first.
- 202630 Apr
Change of use from dwelling house (Class C3) to HMO-house in multiple occupation (Class C4) for up to six…
RefusedFull26/01760/FUL - 202616 Feb
Single storey rear extension and rear dormer with front roof lights.
ApprovedCert of Lawful Use/Operation - Proposed26/00570/CEA - 20265 Feb
Change of use from Use Class C3 (dwelling house) to Use Class C4 (HMO-house in multiple occupation) and…
ApprovedFull26/00443/FUL - 20263 Feb
Single-storey rear extension 6m deep x 3m high (3m high to eaves).
ApprovedClass A HH - Prior Approval26/00413/PRH
Source: Enfield
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
Track this application
Get email alerts when there is a planning decision or status change.
Get email alerts near N9
New planning applications delivered to your inbox daily.
Around this site
Nearby applications
- 20 St Alphege Road London N9 8BX26/00570/CEA · OutlineApproved0.0 mi
- 20 St Alphege Road London N9 8BX26/00443/FUL · FullApproved0.0 mi
- 20 St Alphege Road London N9 8BX26/01760/FUL · FullRefused0.0 mi
- 20 St Alphege Road London N9 8BX26/00413/PRH · OutlineApproved0.0 mi
- 22 St Alphege Road London N9 8BX24/00782/PRH · OutlineApproved0.0 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Kabilo LimitedVerifiedLondonExtensionsLoft Conversions4.0 mi
- Orient Construction Consultancy LimitedVerifiedLondon6.2 mi
- Building Services LondonVerifiedLondonExtensionsLoft Conversions7.5 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman8.7 mi
Planning something similar?
See what the council approved and refused for changes of use on your street. Pick your home and get the evidence before you pay for drawings.