42 Allison Road, Hornsey, London, N8 0AT

1. 5 Aug 2026

   Received by Haringey

2. 22 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 30 September 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

• 78 Allison Road, Hornsey, London, N8 0AT

  HGY/2024/2545 Submitted 16 Sep 2024 0m away

  The proposal replaces the existing timber sash windows with modern Casement UPVC units.

  Granted Full applications Windows or glazing 10 docs

• 70 Allison Road, Hornsey, London, N8 0AT

  HGY/2026/0735 Submitted 16 Mar 2026 0m away

  Rear dormer and outrigger roof extension, rear terrace to outrigger extension and two front rooflights.

  Granted Householder Extension Loft or dormer 14 docs
  Domestic

• 42 Allison Road, Hornsey, London, N8 0AT

  HGY/2026/2219 Submitted 1 Sep 2026 0m away

  91% historically approved · decision due ~27 Oct

  Single-storey side-return infill extension and installation of AC condenser units.

  Awaiting decision Householder Extension 6 docs
  Small domestic

• 28 Allison Road, Hornsey, London, N8 0AT

  HGY/2026/1974 Submitted 14 Jul 2026 0m away

  Formation of rear dormer with rooflights on front slope.

  Granted Householder Loft or dormer 10 docs
  Domestic

• 28 Allison Road, Hornsey, London, N8 0AT

  HGY/2026/1964 Submitted 13 Jul 2026 0m away

  Certificate of Lawfulness Proposed: Proposed outrigger extension.

  Granted Lawful development Extension 11 docs

• 2 Hewitt Road, Hornsey, London, N8 0BL

  HGY/2025/2412 Submitted 8 Sep 2025 74m away

  Erection of rear dormer, raise ridge height and installation of rooflights on front slope

  Granted Householder Loft or dormer Roofing 11 docs
  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