26 Onslow Gardens, Hornsey, London, N10 3JU

This site has had 2 applications since 2026: 1 approved, 0 refused.

• HGY/2026/1669 Awaiting decision

  26 Onslow Gardens, Hornsey, London, N10 3JU

  Erection of a wrap around ground floor rear extension and extension of first floor rear outrigger; erection of two front roof lights.

  Submitted 24 Jun 2026 Householder

1. 16 Jun 2026

   Received by Haringey

2. 24 Jul 2026

   Added to PlanIndex

3. 11 Aug 2026

   Decision issued: Approve

Haringey granted permission on 11 August 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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 Onslow Gardens, Hornsey, London, N10 3JU

  HGY/2026/1408 Submitted 19 May 2026 50 yards away

  Enlargement of existing rear dormer and installation of a front dormer window.

  Granted Householder Loft or dormer Windows or glazing 10 docs
  Domestic

• 24 Onslow Gardens, Hornsey, London, N10 3JU

  HGY/2026/1679 Submitted 15 Jun 2026 50 yards away

  Erection of a single storey rear and side extension and installation of rear rooflights to infill extension. (AMENDED DESCRIPTION)

  Granted Householder Extension Loft or dormer 7 docs
  Small domestic

• 8 Onslow Gardens, Hornsey, London, N10 3JU

  HGY/2026/2710 Submitted 30 Sep 2026 50 yards away

  90% historically approved · decision due ~25 Nov

  Installation of zinc cladding, Juliet balcony and French doors to the existing rear outrigger.

  Awaiting decision Householder Extension Windows or glazing 11 docs
  Domestic

• 26 Onslow Gardens, Hornsey, London, N10 3JU

  HGY/2026/1669 Submitted 24 Jun 2026 50 yards away

  90% historically approved · decision due ~19 Aug

  Erection of a wrap around ground floor rear extension and extension of first floor rear outrigger; erection of two front roof lights.

  Awaiting decision Householder Extension Loft or dormer 14 docs
  Domestic

• 24 Onslow Gardens, Hornsey, London, N10 3JU

  HGY/2026/0940 Submitted 1 Apr 2026 50 yards away

  Certificate of lawfulness for the proposed erection of a rear dormer.

  Granted Lawful development Loft or dormer 5 docs

• 20, Onslow Gardens, London, N10 3JU

  HGY/2021/2396 Submitted 16 Aug 2021 50 yards away

  Non-material amendment following a grant of planning permission HGY/2021/1113 involving the retention of existing wall to allow for a bin store area

  Granted Amendments 4 docs

• 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