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 53 days over the applications it decided in the last year.

This application is with Haringey for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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

• 30, Northcott Avenue, London, N22 7DB

  HGY/2021/2382 Submitted 19 Jul 2021 47m 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 66m 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

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

  HGY/2022/4516 Submitted 22 Dec 2022 66m 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 66m 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

• 15, Cornwall Avenue, London, N22 7DA

  HGY/2021/1763 Submitted 21 Jun 2021 67m away

  Erection of a single storey extension which extends beyond the rear wall of the original house by 5.15m, for which the maximum height would be 3m and for which the height of the eaves would be 2.9m

  Decided Prior approval Extension 7 docs
  Small domestic

• Ground Floor Flat, 15, Eastern Road, London, N22 7DD

  HGY/2019/3298 Submitted 18 Dec 2019 71m away

  Non-material amendment following a grant of planning permission HGY/2016/1455 seeking the following ammendments to the contsented scheme: 1. Reduced slope of both side and rear extension roofs. 2. Internal gutter to replace external gutter along new sidewall. 3. Relocation of side window from the existing wall to the new sidewall. 4. Removal of hip in the rear roof extension. 5. Second Velux window on the side extension roof. 6. Panoramic door across the rear extension to replace the French doors.

  Granted Amendments Extension Loft or dormer +1 9 docs

• HGY/2026/1951 Granted

  105 Alexandra Road, Wood Green, London, N8 0LG

  Certificate of Lawfulness (existing) for continued use of property as two flats (C3)

  10 Jul 2026 Lawful development
• HGY/2026/2416 Awaiting decision

  Vincent House, 1A Vincent Road, Tottenham, London, N15 3QA

  Certificate of Lawfulness: Existing use of the property as six self-contained flats.

  4 Sep 2026 Lawful development
• HGY/2026/2154 Awaiting decision

  86 Palmerston Road, Wood Green, London, N22 8RF

  Certificate of Lawfulness Existing: Property was converted from a single dwelling house into 3no. self-contained flats in May 2010.

  2 Sep 2026 Lawful development
• HGY/2026/2107 Awaiting decision

  83 Lancaster Road, Hornsey, London, N4 4PL

  Certificate of lawfulness (proposed): rear roof terrace.

  2 Sep 2026 Lawful development
• HGY/2026/2354 Awaiting decision

  118 Philip Lane, Tottenham, London, N15 4JL

  Lawful development: Existing use of first and loft floor levels of No. 118 Philip Lane as two self-contained C3 residential units.

  1 Sep 2026 Lawful development