P2026/0311/COL

1. 5 Feb 2026

   Received by Islington

2. 31 Mar 2026

   Decision issued: Approve with no conditions

3. 25 Jul 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• P2026/0890/FUL Granted

  131 St Thomas's Road, London, N4 2QJ

  Amalgamation of 2 flats to form a single dwellinghouse. Construction of ground floor rear infill extension and replacement rear window. Construction of rear dormer loft extension and front rooflights.

  1 Apr 2026 66m away Full applications
• P2024/2470/FUL Granted

  4, Avenell Road, London, N5 1DP

  Erection of single storey rear extension

  15 Aug 2024 72m away Householder
• P2026/1672/FUL Awaiting decision

  26 Plimsoll Road, London, N4 2EL

  Erection of single storey rear infill extension

  25 Jun 2026 81m away Householder
• P2026/0316/FUL Granted

  54 Ambler Road, London, N4 2QR

  Erection of rear dormer roof extension, installation of front rooflights and increase in ridge height.

  6 Feb 2026 82m away Householder
• P2026/0114/S73 Granted

  Flat B, 58 Plimsoll Road, London, N4 2EE

  Section 73 (minor material amendment) application for removal/variation of Condition 2 (Approved Drawings) of planning consent ref: P2025/3279/FUL dated 08-Jan-2026. 'Erection of a mansard roof extension.' The variation seeks the following: Introduction of two new window openings on the side elevation at loft level.

  16 Jan 2026 99m away Amendments
• P2024/2769/FUL Granted

  47 Plimsoll Road, London, N4 2EN

  Rear wraparound extension to replace the existing conservatory.

  13 Sep 2024 109m away Householder

• P2026/1005/COL Granted

  505A Hornsey Road, London

  Certificate of Lawfulness (Existing) for the use of the first, second and third floors as a 6-room large HMO (Use Class Sui Generis)

  15 Apr 2026 Lawful development
• P2026/1434/COL Granted

  9 Alwyne Square, London, N1 2JX

  Installation of 3 rooflights in the rear roof slope.

  3 Jun 2026 Lawful development
• P2026/0980/COL Granted

  4A Cowcross Street, London, EC1M 6DR

  Certificate of Lawful (Existing) development for the use of the first, second and third floors as three self-contained studio flats (Class C3)

  14 Apr 2026 Lawful development
• P2026/1324/COL Granted

  Gough House, 1 Windsor Street, London, N1 8QA

  Certificate of Lawfulness (proposed) for the installation of low-level play equipment, seating, planter with trellis, grass matting and a self-closing child-safety gate fixed to existing metal hoop-top fencing.

  21 May 2026 Lawful development
• P2026/1943/COL Awaiting decision

  49, Linton Street, London, N1 7AN

  Certificate of Lawfulness (Proposed) for the construction of a garden studio/outbuilding in rear garden.

  21 Jul 2026 Lawful development