12 Thornhill Crescent, London, N1 1BL

This site has had 2 applications since 2021: 2 approved, 0 refused.

• P2021/2108/LBC Granted

  12 Thornhill Crescent, London, N1 1BL

  Removal of an existing modern infill extension to the rear and replacement with a new glazed extension; replacement of rear window at lower ground floor; relocation of boiler and hotwater storage tank to rear lower ground floor level; installation of York stone paving; replacement of the existing non-original front garden walls with railings to match adjacent; adjustment of grating enclosing lightwell; installation of new cast iron steps and new enclosed storage area; removal of lower ground floor sliding patio doors and replacement with timber French doors; replacement of lower ground floor window with new panelled entrance door; and bin store at lower ground floor level; damp-proofing to front vaults; installation of timber flooring over original floorboards throughout; new panelled doors, architraves; refurbished bathrooms; re-location of kitchen to front upper ground floor and enlargement of opening between front and rear rooms; adjustment of attic space. Also linked to full application P2021/2085.

  Decided 24 Sep 2021 Heritage and listed buildings

1. 16 Jul 2021

   Received by Islington

2. 24 Sep 2021

   Decision issued: Approve with conditions

3. 29 Sep 2026

   Added to PlanIndex

• P2021/2108/LBC Granted

  12 Thornhill Crescent, London, N1 1BL

  Removal of an existing modern infill extension to the rear and replacement with a new glazed extension; replacement of rear window at lower ground floor; relocation of boiler and hotwater storage tank to rear lower ground floor level; installation of York stone paving; replacement of the existing non-original front garden walls with railings to match adjacent; adjustment of grating enclosing lightwell; installation of new cast iron steps and new enclosed storage area; removal of lower ground floor sliding patio doors and replacement with timber French doors; replacement of lower ground floor window with new panelled entrance door; and bin store at lower ground floor level; damp-proofing to front vaults; installation of timber flooring over original floorboards throughout; new panelled doors, architraves; refurbished bathrooms; re-location of kitchen to front upper ground floor and enlargement of opening between front and rear rooms; adjustment of attic space. Also linked to full application P2021/2085.

  Decided 24 Sep 2021 Heritage and listed buildings

Islington granted permission on 24 September 2021, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 12 Thornhill Crescent, London, N1 1BL

  P2021/2108/LBC Submitted 16 Jul 2021 50 yards away

  Removal of an existing modern infill extension to the rear and replacement with a new glazed extension; replacement of rear window at lower ground floor; relocation of boiler and hotwater storage tank to rear lower ground floor level; installation of York stone paving; replacement of the existing non-original front garden walls with railings to match adjacent; adjustment of grating enclosing lightwell; installation of new cast iron steps and new enclosed storage area; removal of lower ground floor sliding patio doors and replacement with timber French doors; replacement of lower ground floor window with new panelled entrance door; and bin store at lower ground floor level; damp-proofing to front vaults; installation of timber flooring over original floorboards throughout; new panelled doors, architraves; refurbished bathrooms; re-location of kitchen to front upper ground floor and enlargement of opening between front and rear rooms; adjustment of attic space. Also linked to full application P2021/2085.

  Granted Heritage and listed buildings Extension Windows or glazing 2 docs

• Flat C, 6 Thornhill Crescent, London, N1 1BL

  P2025/2882/FUL Submitted 21 Oct 2025 50 yards away

  Retention of replacement of a window within the existing dormer.

  Granted Full applications Loft or dormer Windows or glazing

• Flat C, 6 Thornhill Crescent, London, N1 1BL

  P2025/2883/LBC Submitted 21 Oct 2025 50 yards away

  Retrospective application for retention replacement of a window within the exist

  Granted Heritage and listed buildings Windows or glazing

• 8 Thornhill Crescent, London, N1 1BL

  P2024/3492/TRE Submitted 22 Nov 2024 50 yards away

  99% historically approved · decision due ~24 Jan

  Fig (T1) - Pollard at 3m. The tree has grown far too big for the space and needs to be brought down so it can be managed as a much smaller tree.

  Decided Trees 3 docs

• 8 Thornhill Crescent, London, N1 1BL

  P2021/2319/TRE Submitted 6 Aug 2021 50 yards away

  Rear garden Eucalyptus (T1) - Reduce height down to 2.5m (the 1st growth point).

  Granted Trees 3 docs

• 25 Huntingdon Street, London, N1 1BS

  P2025/0467/TRE Submitted 17 Feb 2025 50 yards away

  99% historically approved · decision due ~22 Apr

  T1 Ash Tree Height reduction -1.75m Spread reduction - 1.5m Removal of dead growth Repeat of maintenance work of 3-4 years ago (on a cycle that Gibbs & Haynes has carried out on a regular basis) Increasing light to garden of 25 and surrounding gardens

  Decided Trees 4 docs

• P2026/2615/FUL Awaiting decision

  23 Framfield Road, London, N5 1UU

  Erection of outrigger dormer extension and all associated works.

  Received 2 Oct, published by the council 11 Oct 2026 Householder
• P2026/2593/FUL Awaiting decision

  1 Wyatt Road, London, N5 2JU

  Erection of mansard roof extension.

  Received 1 Oct, published by the council 2 Oct 2026 Householder
• P2026/2124/FUL Granted

  13 Willow Bridge Road, London, N1 2LB

  Installation of mechanical plant comprising air source heat pumps and an air han

  Received 7 Aug, published by the council 19 Aug 2026 Householder
• P2026/0821/FUL Granted

  32 Harberton Road, London, N19 3JR

  Retention of 1x bike store and 1x bin store within front garden

  Received 26 Mar, published by the council 25 Jul 2026 Householder
• P2026/2571/FUL Awaiting decision

  3 Sotheby Road, London, N5 2UP

  Proposed replacement front boundary wall with railings, front garden alterations to enlarge lightwell, cycle and refuse storage and refurbished stone front steps.

  Received 29 Sep, published by the council 11 Oct 2026 Householder