18 Northcott Avenue, Wood Green, London, N22 7DB

1. 19 Aug 2026

   Received by Haringey

2. 31 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 14 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Haringey took a median of 55 days over the applications it decided in the last year.

This application is with Haringey for determination, against a statutory target of eight weeks. Over the last year Haringey decided lawful development applications in a median of 46 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.

• 24 Northcott Avenue, Wood Green, London, N22 7DB

  HGY/2023/0110 Submitted 12 Jan 2023 50 yards away

  Certificate of lawfulness for formation of dormer in rear roof slope with Juliet balcony and installation of two roof lights in front roof slope.

  Granted Lawful development Loft or dormer 16 docs

• 30, Northcott Avenue, London, N22 7DB

  HGY/2021/2382 Submitted 19 Jul 2021 50 yards away

  Certificate of lawfulness: Construction of full width dormer extension at loft level.

  Granted Lawful development Extension Loft or dormer 13 docs

• 25 Cornwall Avenue, Wood Green, London, N22 7DA

  HGY/2025/2116 Submitted 10 Sep 2025 50 yards away

  Non-Material Amendment to the application HGY/2025/0964 for 'erection of a single-storey ground floor rear extension and replacement of an existing garden room' as approved on 22/05/2025 for the increase of depth of the approved rear extension by 0.5 metres and retention of the pre-existing outrigger.

  Granted Amendments Extension 14 docs
  Small domestic

• 17 Cornwall Avenue, Wood Green, London, N22 7DA

  HGY/2023/0415 Submitted 10 Feb 2023 50 yards away

  Certificate of Lawfulness for proposed single storey rear extension

  Granted Lawful development Extension 8 docs
  Small domestic

• 13 Cornwall Avenue, Wood Green, London, N22 7DA

  HGY/2022/4516 Submitted 22 Dec 2022 50 yards away

  Certificate of lawfulness for the existing use of the property as two separate self-contained flats comprising a 1-bedroom ground-floor flat with access to the rear garden and a 1-bedroom first-floor flat.

  Granted Lawful development New dwelling 6 docs

• 17 Cornwall Avenue, Wood Green, London, N22 7DA

  HGY/2023/0567 Submitted 24 Feb 2023 50 yards away

  Erection of single storey extension which extends beyond the rear wall of the original house by 3.66m, for which the maximum height would be 3.2m and for which the height of the eaves would be 2.99m

  Decided Prior approval Extension 8 docs
  Small domestic

• HGY/2026/2285 Granted

  13 Woollaston Road, Hornsey, London, N4 1SD

  Certificate of Lawfulness (proposed) for loft conversion with rear dormer extension.

  Received 14 Aug, published by the council 22 Aug 2026 Lawful development
• HGY/2026/2357 Granted

  40 Falmer Road, Tottenham, London, N15 5BA

  Lawful development Certification for proposed erection of rear roof extension and insertion of front rooflight

  Received 21 Aug, published by the council 4 Oct 2026 Lawful development
• HGY/2026/2692 Granted

  125 High Cross Road, Tottenham, London, N17 9NR

  Lawful development: Proposed use for change of use within Class E to a Nail shop (Class E(c)(iii))

  Received 29 Sep, published by the council 4 Oct 2026 Lawful development
• HGY/2026/2637 Granted

  30 Gloucester Road, Tottenham, London, N17 6DH

  Lawful development: Proposed use. Loft conversion including 2x roof lights and L-shaped box dormer to the rear roof slopes with materials to match existing materials on main roof

  Received 21 Sep, published by the council 4 Oct 2026 Lawful development
• HGY/2026/2420 Granted

  50 St Loys Road, Tottenham, London, N17 6UD

  Certificate of Lawfulness: Proposed erection of an L-shaped rear dormer including the insertion of 2nos. front rooflights.

  Received 28 Aug, published by the council 7 Sep 2026 Lawful development