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Planning application

24 Onslow Gardens, Hornsey, London, N10 3JU

Granted Haringey HGY/2026/1408 Householder planning permission

Works: Loft or dormer Windows or glazing Domestic

Read from the description, not a valuation. How we read the register

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

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

As published by the council, reference HGY/2026/1408

Application record

Reference
HGY/2026/1408
Type
Householder planning permission
Status
Decision Made
Decision
Granted As published: Approve with Conditions
Received
19 May 2026
Validated
19 May 2026
Decided
14 Jul 2026
Ward
Muswell Hill
Decision by
Delegated Decision
Postcode
N10 3JU

Site history

Applications at this address on the Haringey register

This site has had 3 applications since 2026: 3 approved, 0 refused.

  • HGY/2026/1679 Granted

    24 Onslow Gardens, Hornsey, London, N10 3JU

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

    Decided 28 Aug 2026 Householder
  • HGY/2026/0940 Granted

    24 Onslow Gardens, Hornsey, London, N10 3JU

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

    Decided 2 Apr 2026 Lawful development

Timeline

Dates from the published record

  1. 19 May 2026

    Received by Haringey

  2. 14 Jul 2026

    Decision issued: Approve with Conditions

  3. 24 Jul 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

10 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

What this grant of permission means

Haringey granted permission on 14 July 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.

About householder applications

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

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

    HGY/2026/1715 Submitted 16 Jun 2026 50 yards away

    Certificate of Lawfulness for the proposed erection of a dormer extension to the rear and the installation of two rooflights on the front roof slope.

    Granted Lawful development Extension Loft or dormer 18 docs

  • 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

In Haringey

  • HGY/2026/1799 Awaiting decision

    14 Kingsley Place, Hornsey, London, N6 5EA

    The installation of 20 x 460W solar panels on the flat roof of 14 Kingsley Place, together with the routing of external heat-pump pipework over the flat roof.

    Received 8 Oct, published by the council 11 Oct 2026 Householder
  • HGY/2026/1048 Granted

    18 Muswell Avenue, Hornsey, London, N10 2EG

    Erection of a single storey lower ground floor rear extension with roof terrace and associated landscaping works, insertion of rear ground floor door to proposed terrace, alterations and replacement of rear dormer glazing and first floor rear window, and alterations to front garage door and lower ground window.

    Received 15 May, published by the council 24 Jul 2026 Householder
  • HGY/2026/2213 Awaiting decision

    2 Parkwood Mews, Hornsey, London, N6 5UR

    Convert the basement into a basement flat (retrospective application).

    Received 5 Oct, published by the council 11 Oct 2026 Householder
  • HGY/2026/2541 Awaiting decision

    132 Vartry Road, Tottenham, London, N15 6HA

    Erection of a single storey rear/side extension, together with the installation of a Sukkah roof

    Received 5 Oct, published by the council 11 Oct 2026 Householder
  • HGY/2026/2240 Granted

    40 Cholmeley Park, Hornsey, London, N6 5ER

    Installation of a new painted timber sash window to the existing side dormer on the north elevation of the property at second floor level.

    Received 10 Aug, published by the council 31 Aug 2026 Householder