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Planning application

40 Northiam London N12 7HJ

Refused Barnet 26/0613/HSE Householder Application

Works: Extension Demolition Small domestic

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

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

Single storey side and rear extension including alteration to the existing access steps following demolition of the side garage and rear outbuilding

As published by the council, reference 26/0613/HSE

Application record

Reference
26/0613/HSE
Type
Householder Application
Status
Refused
Decision
Refused As published: Refuse
Received
17 Feb 2026
Validated
19 Feb 2026
Decided
16 Apr 2026
Ward
Totteridge & Woodside
Decision by
Delegated Decision
Postcode
N12 7HJ

Site history

Applications at this address on the Barnet register

This site has had 4 applications since 2025: 1 approved, 2 refused.

  • 26/2250/HSE Decided

    40 Northiam London N12 7HJ

    Single storey side and rear extension including 3no. flat rooflights and alteration to the existing access steps following demolition of the side garage and rear outbuilding

    Submitted 16 Jun 2026 Householder
  • 25/4397/PNH Refused

    40 Northiam London N12 7HJ

    Single storey rear and side extension with a proposed depth from the rear wall of 4.00m, maximum height of 3.00m and eaves height of 3.00m following the demolition of the existing side extension and shed

    Decided 10 Dec 2025 Prior approval
  • 25/4202/192 Granted

    40 Northiam London N12 7HJ

    Roof extension involving hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window

    Decided 17 Nov 2025 Lawful development

Timeline

Dates from the published record

  1. 17 Feb 2026

    Received by Barnet

  2. 19 Feb 2026

    Validated

    Checked as complete and ready for consideration.

  3. 16 Apr 2026

    Decision issued: Refuse

  4. 10 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Reed Design Agent, a design practice registered in Leamington Spa

Dissolved · incorporated 1999 · Leamington Spa

2 applications on PlanIndex

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Documents

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

14 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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What this refusal means

Barnet refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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

  • 40 Northiam London N12 7HJ

    25/4202/192 Submitted 20 Oct 2025 50 yards away

    Roof extension involving hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window

    Granted Lawful development Extension Loft or dormer +1 8 docs

  • 40 Northiam London N12 7HJ

    25/4397/PNH Submitted 4 Nov 2025 50 yards away

    Single storey rear and side extension with a proposed depth from the rear wall of 4.00m, maximum height of 3.00m and eaves height of 3.00m following the demolition of the existing side extension and shed

    Refused Prior approval Extension Demolition 6 docs
    Small domestic

  • 71 Southover London N12 7HG

    26/2397/CON Submitted 24 Jun 2026 50 yards away

    Submission of details of condition 7 (Noise mitigation - Air Con and ASHP) pursuant to planning permission 26/0983/HSE dated 15/06/2026

    Granted Conditions 3 docs

  • 71 Southover London N12 7HG

    26/0983/HSE Submitted 16 Mar 2026 50 yards away

    77% historically approved · decision due ~15 Jun

    Conversion of garage into habitable room including insertion of windows to replace existing garage doors and addition of new pitched roof with rooflight. Two storey side extension following demolition of existing store. Roof extension including 1no. side dormer window, 1no. rear dormer window and 2no. front facing rooflights and increase in ridge height. Installation of solar panels. Alterations to ground floor rear projection including changes to fenestration and insertion of rooflights to flat roof. Addition of 1no. AC condenser unit and 1no. Air Source Heat Pump to side elevation. Removal of chimneys

    Awaiting decision Householder Extension Loft or dormer +3 6 docs
    Domestic

  • 40 Northiam London N12 7HJ

    26/2250/HSE Submitted 16 Jun 2026 100 yards away

    77% historically approved · decision due ~11 Aug

    Single storey side and rear extension including 3no. flat rooflights and alteration to the existing access steps following demolition of the side garage and rear outbuilding

    Decided Householder Extension Loft or dormer +1
    Several homes

  • 58 Northiam London N12 7HJ

    25/4079/HSE Submitted 10 Oct 2025 100 yards away

    77% historically approved · decision due ~8 Dec

    Part single, part two storey front, side and rear extensions following demolition of existing garage and ground floor side and rear extension. Insertion of 1no. new first floor window to flank elevation. Alterations to front steps. New front porch. Alterations to rear patio

    Awaiting decision Householder Extension Demolition +1 20 docs
    Small domestic

In Barnet

  • 26/3853/HSE Awaiting decision

    30 Goldsmith Avenue London NW9 7HB

    Single storey rear extension following demolition of the existing extension

    23 Oct 2026 Householder
  • 26/3856/HSE Awaiting decision

    229 Hale Drive London NW7 3EH

    Single storey rear extension

    23 Oct 2026 Householder
  • 26/3827/HSE Awaiting decision

    43 Hermitage Lane London NW2 2HE

    Single storey rear extension with 3no. rooflights following demolition of the existing conservatory. Replacement front bay window and entrance porch. First floor rear juliette balcony. Changes to fenestration including new window openings and enlarged front rooflight

    22 Oct 2026 Householder
  • 26/3833/HSE Awaiting decision

    47 Holne Chase London N2 0QG

    Single storey rear extension. Replacement of single glazed windows with double glazing. Alterations to side/rear fenestration. Alterations and replacement of existing rear dormer window addition of 2no. side dormer windows and 3no. rooflights. Installation of cameras and wall lights. Replacement of the front entrance and garage doors, installation of timber side garden gates

    22 Oct 2026 Householder
  • 26/3841/HSE Awaiting decision

    Manor House West Heath Close London NW3 7NJ

    New metal framed pergola to upper ground floor rear terrace

    Received 22 Oct, published by the council 23 Oct 2026 Householder