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Planning application

36 Horsham Avenue London N12 9BE

Granted Barnet 26/0689/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing

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

Proposal

Roof extension involving rear dormer window and 3no. front facing rooflights

As published by the council, reference 26/0689/192

Application record

Reference
26/0689/192
Type
Proposed Lawful Development Certificate
Status
Lawful
Decision
Granted As published: Lawful
Received
23 Feb 2026
Validated
23 Feb 2026
Decided
25 Feb 2026
Ward
Woodhouse
Decision by
Delegated Decision
Postcode
N12 9BE

Site history

Applications at this address on the Barnet register

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

  • 26/0690/HSE Granted

    36 Horsham Avenue London N12 9BE

    Single storey rear extension with new landing area with associated access steps following removal of the existing patio area

    Decided 17 Apr 2026 Householder

Timeline

Dates from the published record

  1. 23 Feb 2026

    Received by Barnet

  2. 25 Feb 2026

    Decision issued: Lawful

  3. 10 Aug 2026

    Added to PlanIndex

Documents

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

4 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

Barnet granted permission on 25 February 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 lawful development applications

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.

Nearby applications

Within 0.3 miles

  • 36 Horsham Avenue London N12 9BE

    26/0690/HSE Submitted 23 Feb 2026 50 yards away

    Single storey rear extension with new landing area with associated access steps following removal of the existing patio area

    Granted Householder Extension 8 docs
    Small domestic

  • 47 Horsham Avenue London N12 9BG

    25/3376/HSE Submitted 12 Aug 2025 50 yards away

    Single storey rear extension with flat roof and raised rooflight following demolition of existing lean-to extension. Roof extension including 1no. rear dormer window with juliette balcony and 2no. rooflights to front roofslope. Alterations to rear landscaping including new rear patio/paving

    Granted Householder Extension Loft or dormer +2 16 docs
    Small domestic

  • 28 Friern Barnet Lane London N11 3LX

    26/0339/RCU Submitted 29 Jan 2026 100 yards away

    65% historically approved · decision due ~8 Apr

    Erection of a rear outbuilding (Retrospective Application)

    Awaiting decision Amendments 3 docs

  • 20 Ashurst Road London N12 9AX

    26/1815/192 Submitted 14 May 2026 100 yards away

    Roof extension involving removal and replacement of the existing rear dormer and insertion of 3no. front facing rooflights

    Granted Lawful development Extension Loft or dormer 5 docs

  • Flat 2 2 Ashurst Road London N12 9AX

    26/1864/FUL Submitted 18 May 2026 150 yards away

    Roof extension with rear dormer with juliette balcony, outrigger dormer, 2no. side (1 to each side) and 3no. front facing rooflights

    Refused Full applications Extension Loft or dormer 18 docs

  • 25 Queens Parade Friern Barnet Road London N11 3DA

    26/0087/S73 Submitted 12 Jan 2026 200 yards away

    93% historically approved · decision due ~9 Mar

    Variation of condition 1 (Approved plans) of planning permission 25/2083/FUL dated 31/10/2025 for Change of use of existing first and second floor flat (Use Class C3) to a 4 bed HMO (House in Multiple Occupation (Use Class C4) for 6 people. Including: First floor rear pitched roof extension with 4no. rooflights; Roof extension including 2no. rear dormer windows and 2no. front facing rooflights. Variation to include redirecting existing ground floor flue

    Awaiting decision Conditions Extension Loft or dormer +1 5 docs

In Barnet

  • 26/2679/192 Granted

    21 Myddelton Park London N20 0JH

    Single storey rear extension and increase in ridge height of existing rear outrigger (Amended description).

    Received 20 Jul, published by the council 7 Aug 2026 Lawful development
  • 26/1362/191 Refused

    145 Cotswold Gardens London NW2 1PL

    Use as a House in Multiple Occupation (HMO) for 6 people

    Received 14 Apr, published by the council 25 Jul 2026 Lawful development
  • 26/1907/191 Granted

    8 Golders Manor Drive London NW11 9HT

    Use of the property as a self-contained residential unit at ground floor level and the first and second floors as a 4-bedroom, 4-person House in Multiple Occupation (Sui Generis) (AMENDED DESCRIPTION)

    Received 21 May, published by the council 16 Aug 2026 Lawful development
  • 26/2392/192 Refused

    6 Mostyn Road Edgware HA8 0JD

    New front hardstanding and vehicular access to provide off-street parking

    Received 23 Jun, published by the council 9 Aug 2026 Lawful development
  • 26/2059/192 Refused

    Low Ridge Rowley Lane Barnet EN5 3HS

    Erection of a rear outbuilding

    Received 3 Jun, published by the council 16 Aug 2026 Lawful development