8 Cornwallis Square, London, N19 4LY

This site has had 3 applications since 2025: 2 approved, 0 refused.

• P2026/0215/FUL Granted

  8 Cornwallis Square, London, N19 4LY

  Erection of ground floor single storey rear extension, loft conversion and dorme

  Decided 24 Mar 2026 Householder
• P2025/3436/COL Withdrawn

  8 Cornwallis Square, London, N19 4LY

  Front roof slope insertion of rooflight not to exceed 150mm high; rear roof slope creation of flat dormer roof not to exceed 40m3, set back from eaves by minimum 200mm, and not to exceed existing ridge height; ground floor rear extension not to exceed 3m length, flat roof/eaves not to exceed 3m high.

  Submitted 8 Dec 2025 Lawful development

1. 27 May 2026

   Received by Islington

2. 10 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Decision issued: Approve with conditions

4. 25 Jul 2026

   Added to PlanIndex

Islington granted permission on 21 July 2026, 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.

• 8 Cornwallis Square, London, N19 4LY

  P2026/0215/FUL Submitted 28 Jan 2026 0m away

  Erection of ground floor single storey rear extension, loft conversion and dorme

  Granted Householder Extension Loft or dormer
  Small domestic

• 8 Cornwallis Square, London, N19 4LY

  P2025/3436/COL Submitted 8 Dec 2025 47m away

  Front roof slope insertion of rooflight not to exceed 150mm high; rear roof slope creation of flat dormer roof not to exceed 40m3, set back from eaves by minimum 200mm, and not to exceed existing ridge height; ground floor rear extension not to exceed 3m length, flat roof/eaves not to exceed 3m high.

  Withdrawn Lawful development Extension Loft or dormer +1 7 docs

• 68, Kiver Road, London, N19 4PD

  P2026/1747/FUL Submitted 1 Jul 2026 62m away

  Erection of a mansard roof extension with raised party wall

  Granted Householder Extension Loft or dormer
  Domestic

• 89 Marlborough Road, London, N19 4PA

  P2026/0288/COL Submitted 4 Feb 2026 73m away

  Certificate of lawfulness (proposed) for addition of a second storey to existing

  Withdrawn Lawful development

• 89 Marlborough Road, London, N19 4PA

  P2025/3173/FUL Submitted 18 Nov 2025 73m away

  Erection of single storey rear extension

  Granted Householder Extension
  Small domestic

• Ground Floor Flat, 101 Marlborough Road, London, N19 4PA

  P2026/1214/FUL Submitted 22 May 2026 73m away

  Single storey side extension to ground floor flat and replacement front bay sash

  Granted Full applications Extension Windows or glazing
  Small domestic

• P2026/2364/FUL Awaiting decision

  14C, Highbury Terrace Mews, London, N5 1UT

  Installation of replacement front balcony, front and rear facade/ door alteratio

  16 Sep 2026 Householder
• P2026/2403/FUL Status unknown

  15, Canning Road, London, N5 2JR

  Erection of mansard roof extension.

  11 Sep 2026 Householder
• P2026/2390/FUL Awaiting decision

  67, Leconfield Road, London, N5 2RZ

  Alterations to rear elevation openings and replacment of roof of existing LGF ex

  10 Sep 2026 Householder
• P2026/2307/FUL Awaiting decision

  20, Canonbury Park South, London, N1 2JJ

  Single-storey full-width rear lower ground floor extension, new rear window at g

  10 Sep 2026 Householder
• P2026/2384/FUL Status unknown

  58 Hornsey Lane, London, N6 5LU

  Internal configuration of the existing dwelling, replacement of side and rear el

  9 Sep 2026 Householder