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Planning application

33 Kingsgate Avenue London N3 3DH

Awaiting decision Barnet 25/5029/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing Small domestic

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

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Roof extension involving rear dormer window and 3no. front facing rooflights. New front porch and front window. Erection of a rear outbuilding with terrace area

As published by the council, reference 25/5029/192

Application record

Reference
25/5029/192
Type
Proposed Lawful Development Certificate
Status
Pending Consideration
Received
15 Dec 2025
Validated
16 Dec 2025
Ward
Finchley Church End
Postcode
N3 3DH

Site history

Applications at this address on the Barnet register

This site has had 3 applications since 2025.

  • 26/2232/HSE Decided

    33 Kingsgate Avenue London N3 3DH

    Part single, part two storey side and rear extension following demolition of existing single storey side extension. Roof extension including rear dormer window and 4no. front facing rooflights and 1no. rear facing rooflight. New front porch with an associated relocation of front door. Removal of 1no. chimney. Alterations to hard and soft landscaping including new rear terrace with associated level changes and provision of off-street parking space to front garden. Alterations to fenestration (Amended Description and Plans).

    Submitted 15 Jun 2026 Householder
  • 25/5179/PNH Awaiting decision

    33 Kingsgate Avenue London N3 3DH

    Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.28 metres and eaves height of 2.91 metres.

    Submitted 29 Dec 2025 Prior approval

Timeline

Dates from the published record

  1. 15 Dec 2025

    Received by Barnet

  2. 16 Dec 2025

    Validated

    Checked as complete and ready for consideration.

  3. 10 Aug 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 10 February 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Barnet took a median of 46 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Simon Miller Architects Ltd Agent, an architecture practice registered in London

Active · incorporated 2005 · London

30 applications on PlanIndex · across 4 councils · 92% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

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

24 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.

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

  • 33 Kingsgate Avenue London N3 3DH

    25/5179/PNH Submitted 29 Dec 2025 50 yards away

    56% historically approved · decision due ~3 Mar

    Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.28 metres and eaves height of 2.91 metres.

    Awaiting decision Prior approval Extension 22 docs
    Small domestic
  • 33 Kingsgate Avenue London N3 3DH

    26/2232/HSE Submitted 15 Jun 2026 100 yards away

    77% historically approved · decision due ~12 Aug

    Part single, part two storey side and rear extension following demolition of existing single storey side extension. Roof extension including rear dormer window and 4no. front facing rooflights and 1no. rear facing rooflight. New front porch with an associated relocation of front door. Removal of 1no. chimney. Alterations to hard and soft landscaping including new rear terrace with associated level changes and provision of off-street parking space to front garden. Alterations to fenestration (Amended Description and Plans).

    Decided Householder Extension Loft or dormer +2 31 docs
    Small domestic
  • 76 Windermere Avenue London N3 3RA

    26/3315/NMA Submitted 10 Sep 2026 200 yards away

    65% historically approved · decision due ~9 Nov

    Non material amendment to planning permission original ref 26/2420/HSE dated 24/08/2026 for 'Erection of a rear outbuilding including raised platform'. Amendments includes changes to landscape and levels

    Awaiting decision Amendments
  • 76 Windermere Avenue London N3 3RA

    26/2420/HSE Submitted 25 Jun 2026 200 yards away

    77% historically approved · decision due ~24 Aug

    Erection of a rear outbuilding including raised platform

    Decided Householder
    Small domestic
  • Rear Of 37 Beechwood Avenue London N3 3BB

    26/2715/FUL Submitted 22 Jul 2026 300 yards away

    Demolition of existing garage. Erection of a two storey dwelling with rooms in the roofspace. Associated hard and soft landscaping, refuse/recycling and cycle store, amenity space and parking

    Refused Full applications Demolition 25 docs
    Domestic
  • 35 Orchard Avenue London N3 3NL

    26/0433/192 Submitted 5 Feb 2026 300 yards away

    80% historically approved · decision due ~2 Apr

    Roof extension involving hip to gable, rear dormer window, 1no. rear and 2no. front facing rooflights and new side gable window

    Awaiting decision Lawful development Extension Loft or dormer +1 7 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