67 Muswell Hill Place, Hornsey, London, N10 3RP

1. 27 Jan 2023

   Received by Haringey

2. 3 Apr 2023

   Decision issued: Permitted Development

3. 15 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

• 47 Muswell Hill Place, Hornsey, London, N10 3RP

  HGY/2026/1830 Submitted 30 Jun 2026 0m away

  91% historically approved · decision due ~25 Aug

  Erection of a single storey rear extension and alterations to the rear garden.

  Awaiting decision Householder Extension 4 docs
  Small domestic

• 65 Muswell Hill Place, Hornsey, London, N10 3RP

  HGY/2025/3472 Submitted 15 Dec 2025 0m away

  Certificate Of Lawfulness (Proposed) for the erection of a front porch.

  Granted Lawful development Extension 10 docs
  Small domestic

• 71 Hillfield Park, Hornsey, London, N10 3QU

  HGY/2022/4515 Submitted 22 Dec 2022 84m away

  Replacement of existing single glazed windows and doors to the ground floor flat with new timber double glazed windows and doors to match the existing.

  Granted Full applications Windows or glazing 12 docs

• 65, St James's Lane, London, N10 3QY

  HGY/2021/1793 Submitted 22 Jun 2021 87m away

  Creation of mono-pitch roof above existing single storey side garage, single storey upper ground floor rear extension, re-paving of front garden with new steps and balustrades to front entrance, re-cladding of rear dormer with natural blue slate.

  Granted Full applications Extension Loft or dormer 12 docs
  Small domestic

• Risborough Close, Muswell Hill, Hornsey, London, N10 3PL

  HGY/2025/2818 Submitted 14 Oct 2025 127m away

  Construction of a two storey side addition to create 1 x 1 bedroom unit.

  Refused Full applications 18 docs

• 62, St James's Lane, London, N10 3RD

  HGY/2021/1929 Submitted 24 Jun 2021 132m away

  Construction of a dormer with roof lights on front slope.

  Granted Full applications Loft or dormer 8 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