30, Northcott Avenue, London, N22 7DB

1. 19 Jul 2021

   Received by Haringey

2. 23 Aug 2021

   Decision issued: Permitted Development

3. 31 Aug 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

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

  HGY/2026/2337 Submitted 19 Aug 2026 47m away

  91% historically approved · decision due ~14 Oct

  Certificate of Lawfulness (proposed) for amalgamation of two flats back into a single family dwelling.

  Awaiting decision Lawful development New dwelling 4 docs
  Several homes

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

  HGY/2019/3298 Submitted 18 Dec 2019 59m 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

• Flat A, 7 Eastern Road, Wood Green, London, N22 7DD

  HGY/2024/0709 Submitted 14 Mar 2024 70m away

  Erection of ground floor rear extension to ground floor flat.

  Granted Full applications Extension 11 docs

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

  HGY/2025/2116 Submitted 10 Sep 2025 101m 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 101m 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 101m 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/2026/1951 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