4, Chantry Street, London, N1 8NL
Refused on 12 May 2026
Council decision: Refusal of permission
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
Erection of a mansard roof extension.
- Received
- 11 March 2026
- Council
- London Borough of Islington
- Ward
- St Mary's & St James'
- ReceivedReceived11 Mar
- ValidatedValidated11 Mar
- Consult.Consultation11 Apr
- TargetTarget Date5 May
- DecidedDecided12 May
Decided in 62 days (council typically 56)
About this application
This is a full planning application for an extension at 4, Chantry Street, London, N1 8NL. Islington has handled 1,802 applications of this type. This one was decided in 62 days, 6 days longer than Islington's typical decision time. The site is in a conservation area, with 2 listed buildings nearby. There have been 2 other applications at this address. In the past year there have been 93 applications across St Mary's & St James'. We hold 4,098 applications in total for the N1 postcode area.
90% of full applications at London Borough of Islington were approved. Across all application types, the council typically decides in about 8 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- N1 8NL
- Application type
- Full Planning (Householder)
- Scale / size
- Small
Planning application dates
- Date validated
- 11 March 2026
- Consultation expiry
- 11 April 2026
- Consultation end
- 11 April 2026
- Target decision date
- 5 May 2026
- Application expires
- 10 April 2026
Planning decision
- Statutory period
- 55 days
Publicity
- First advertised
- 19 March 2026
- Site notice start
- 19 March 2026
Additional information
- Planning Portal ID
- PP-14766810
- UPRN
- 5300018175
- Documents
- 14
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Duncan Terrace/Colebrooke Row
- Flood zone 1: Low probability (rivers and sea)
Not published by this council, so not checked: Article 4 directions and tree preservation orders. Ask the council if these matter.
Also checked, none recorded (21)
flood storage 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.
Planning history at this site
5 other applications at this property, newest first.
- 20268 Sep
Installation of solar panels on the valley roof and replacement of single-glazed
ApprovedApplicationP2026/2371/FUL - 202531 Oct
Identification: the lime tree at the back of the back garden. Specification of the works proposed: Repeat…
ApprovedApplicationP2025/2981/TRE - 202521 Oct
Erection of a single-storey rear extension.
ApprovedHouseholderP2025/2851/FUL - 202515 Oct
Widening and deepening of existing front lightwell and new front window at existing basement level
ApprovedHouseholderP2025/2906/FUL - 20252 Jun
Certicate of lawfulness (proposed) for the erection of a single storey rear extension
WithdrawnLawful development: Proposed useP2025/1512/COL
Source: Islington
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- 4 Chantry Street, London, N1 8NLP2025/2906/FUL · FullApproved0.0 mi
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For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Orient Construction Consultancy LimitedVerifiedLondon1.4 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman2.0 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing2.6 mi
- Building Services LondonVerifiedLondonExtensionsLoft Conversions3.6 mi
Planning something similar?
See what the council approved and refused for loft conversions and dormers on your street. Pick your home and get the evidence before you pay for drawings.