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Planning application

36 Horsham Avenue London N12 9BE

Decided Barnet 26/0689/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

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
Lawful
Received
23 Feb 2026
Validated
23 Feb 2026
Decided
25 Feb 2026
Ward
Woodhouse
Decision by
Delegated Decision
Postcode
N12 9BE

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.

Trade members open them from here.

Open the documents

After the decision

The process from here

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

About lawful development applications

How this application type works

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

Nearby applications

Within 500 metres

  • 36 Horsham Avenue London N12 9BE

    26/0690/HSE Submitted 23 Feb 2026 0m 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
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  • 47 Horsham Avenue London N12 9BG

    25/3376/HSE Submitted 12 Aug 2025 54m 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
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  • 28 Friern Barnet Lane London N11 3LX

    26/0339/RCU Submitted 29 Jan 2026 102m away

    70% historically approved · decision due ~8 Apr

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  • 20 Ashurst Road London N12 9AX

    26/1815/192 Submitted 14 May 2026 113m away

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

    Decided Lawful development Extension Loft or dormer 5 docs

  • Flat 2 2 Ashurst Road London N12 9AX

    26/1864/FUL Submitted 18 May 2026 151m 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 199m away

    95% 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

  • 26/1907/191 Decided

    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)

    21 May 2026 Lawful development
  • 26/2059/192 Decided

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    3 Jun 2026 Lawful development
  • 26/2066/192 Decided

    355 Hendon Way London NW4 3NB

    Roof extension involving rear dormer window and 3no. front facing rooflights. Removal of chimney on rear elevation (AMENDED DESCRIPTION)

    3 Jun 2026 Lawful development
  • 26/1663/192 Decided

    152 Deans Lane Edgware HA8 9NT

    Change of use from single family dwellinghouse (Class C3a) to supported living accommodation Class C3b)

    5 May 2026 Lawful development
  • 26/2025/192 Decided

    18 Hale Drive London NW7 3DU

    Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

    1 Jun 2026 Lawful development