16 - 18 Rheidol Mews, London, N1 8NU

1. 18 Aug 2025

   Received by Islington

2. 25 Jul 2026

   Added to PlanIndex

3. 7 Sep 2026

   Status changed to VALIDATED

4. Decision

   Awaiting decision

   Decision expected by 13 October 2025, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Islington took a median of 53 days over the applications it decided in the last year.

This application is with Islington for determination, against a statutory target of eight weeks. Over the last year Islington decided lawful development applications in a median of 60 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 40-41 Rheidol Mews, London, N1 8NU

  P2026/0467/COL Submitted 18 Feb 2026 50 yards away

  Certificate of Lawfulness (existing) to confirm use of the property as a single

  Refused Lawful development

• 42 - 43, Rheidol Mews, London, N1 8NU

  P2026/0468/COL Submitted 18 Feb 2026 50 yards away

  Certificate of Lawfulness (existing) to confirm use of the property as a single

  Refused Lawful development

• 17 Allingham Street, London, N1 8NX

  P2026/1611/FUL Submitted 19 Jun 2026 50 yards away

  Erection of a single-storey rear infill extension at lower ground level, a part-width rear extension at upper ground level, and a mansard roof extension. Works include raising cill of upper ground rear window

  Granted Householder Extension Loft or dormer +1 20 docs
  Small domestic

• 31, Allingham Street, London, N1 8NX

  P2026/1116/TRE Submitted 1 May 2026 50 yards away

  Removal of one low hanging branch approx 1 inch in diameter. Tree species: sil

  Granted Trees

• 11 Allingham Street London N1 8NX

  P2026/0207/FUL Submitted 24 Mar 2026 50 yards away

  Replacement of single glazed timber windows with double glazed timber windows, t

  Granted Householder Windows or glazing
  Domestic

• 23 Allingham Street, London, N1 8NX

  P2023/0680/FUL Submitted 9 Mar 2023 50 yards away

  Proposed alterations to existing rear extension including lowering of existing extension walls, amending roof to monopitch traditional lead roof, infilling of existing bathroom window and addition of new rooflight, new tall side window, new door and window to rear of extension and new lead coping to walls of extension.

  Granted Householder Extension Loft or dormer +1 15 docs
  Domestic

• P2026/2548/COL Status unknown

  Flat 5, St Peter's Street Mews, London, N1 8JF

  Certificate of Lawful (Existing) Use for the use of the ground floor property kn

  Received 28 Sep, published by the council 29 Sep 2026 Lawful development
• P2026/2522/COL Status unknown

  Flat 6, 1-2 St Peter's Street Mews, London, N1 8JF

  Certificate of Lawful (Existing) Use for the use of Flat 6 as a self-contained r

  Received 28 Sep, published by the council 29 Sep 2026 Lawful development
• P2026/2549/COL Status unknown

  Flat A, 42 Dartmouth Park Hill, London, NW5 1HN

  Certificate of Lawfulness (Existing) for the conversion of Flat A from a 1-bedro

  Received 25 Sep, published by the council 28 Sep 2026 Lawful development
• P2026/2266/COL Granted

  32 Gillespie Road, London, N5 1LN

  Erection of rear dormer roof extensions to main and outrigger roofs, installatio

  Received 27 Aug, published by the council 2 Sep 2026 Lawful development
• P2026/2525/COL Status unknown

  10A Rock Street, London, N4 2DN

  Certificate of Lawfulness (Proposed) for use of the site as a 5-person small-sca

  Received 24 Sep, published by the council 25 Sep 2026 Lawful development