Skip to content

49, Thornhill Road, N1 1JS

P2025/0210/FULHouseholder planning permissionRefused
Householder

Refused on 17 March 2025

Approximate site (title boundary)
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

Restoration work to the outside of the building, including remedial works to the brickwork and stucco and replacement of gutters and windows. Revised front and rear garden design and levels. Alterations to existing outrigger extension, through the removal of modern alterations and the installation of a large heritage sash window. Reconfiguration to the lower ground floor. A new full width extension to the rear on the Lower Ground Floor. Refurbishment to the interior of the house, including layout changes on the first floor and attic. Rebuilding the roof - including a minor readjustment of the roof pitch and the installation of dormer windows. Installation of a new staircase from the 1st floor to the attic and replacement of staircase from lower ground floor to ground floor. (Resubmission of P2024/2187/FUL).

Submitted
23 January 2025
  1. Received23 Jan
  2. Validated
  3. Consult.
  4. Target
  5. Decided17 Mar

Decided in 53 days (council typically 56)

About this application

This is a planning application for a dormer extension at 49, Thornhill Road, N1 1JS. Islington has handled 356 applications of this type. This one was decided in 53 days, 3 days quicker than Islington's typical decision time. The site is in a conservation area, with 9 listed buildings nearby. There have been 2 other applications at this address. We hold 4,099 applications in total for the N1 postcode area.

94% of householder planning permission 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 1JS
Application type
Householder planning permission

Appeal history

3363231
Dismissed
Type: Planning AppealProcedure: Written RepresentationsDecision: 19 August 2025Dev Type: Householder developmentsReason: Refusal

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Barnsbury
  • Listed building: Grade II: 49, Thornhill RoadOn this site · +1 more
  • 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 (20)

flood storage areas, 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.

Source: Islington

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 N1

New planning applications delivered to your inbox daily.

Around this site

Discuss this application on r/PlanningPermissionUK

For applicants and trades

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.

See what gets approved on your streetBuying this property? Report on this address