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Planning application

26/1423/HSE

41 Lyonsdown Avenue Barnet EN5 1DX

Refused Barnet Householder Application

Proposal

Single storey rear extension with new lowered patio area and associated access steps. New hard and soft landscaping. Conversion of the existing garage into habitable room, insertion of window to replace garage door

As published by the council, reference 26/1423/HSE

Timeline

Dates from the published record

  1. 17 Apr 2026

    Received by Barnet

  2. 20 Apr 2026

    Validated

    Checked as complete and ready for consideration.

  3. 19 May 2026

    Decision issued: Refuse

  4. 25 Jul 2026

    Added to PlanIndex

What refusal means

The process from here

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

About householder applications

How this application type works

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

Nearby applications

Within 500 metres

  • 26/2575/HSE Awaiting decision

    59 Lyonsdown Avenue Barnet EN5 1DX

    Single storey side extension to provide bike store. Addition of a canopy above side door. New timber gates to side. Roof extension involving 1no. new dormer window to rear elevation. Insertion of 2no. circular windows to rear elevation. Alterations to front garden including changes to existing driveway and widening of vehicular access, and new steps. New raised patio to rear with associated steps to garden. New brick garden wall to rear. Replacement of existing windows with triple glazed timber windows

    8 Jul 2026 45m away Householder
  • 26/1299/HSE Awaiting decision

    29 Monks Avenue Barnet EN5 1BZ

    Single storey side and rear infill extension including new front porch following demolition of the side/rear storage. Demolition of the side/rear storage and erection of a single storey infill rear and side extension including the front porch Demolition of the side/rear storage and erection of a single storey infill rear and side extension including the front porch

    8 Apr 2026 182m away Householder
  • 26/1136/192 Decided

    Woodstock 5 Willenhall Avenue Barnet EN5 1JN

    Erection of a rear outbuilding

    25 Mar 2026 203m away Lawful development
  • 26/1164/HSE Granted

    78 Lyonsdown Road Barnet EN5 1JL

    Single storey side and rear extension. Front porch extension. Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. front facing rooflights and new side gable window

    26 Mar 2026 308m away Householder
  • 26/1499/FUL Awaiting decision

    Fairway Court Great North Road Barnet EN5 1HJ

    Re-rendering of all external elevations,. Replacement of all existing balcony balustrades and replacement of existing entrance canopies to blocks A and B

    22 Apr 2026 387m away Full applications
  • 26/1175/HSE Refused

    45 Netherlands Road Barnet EN5 1BP

    Single storey rear extension with 2no. rooflights. Alterations to the existing patio area including new access steps

    27 Mar 2026 401m away Householder

In Barnet

  • 26/2837/HSE Awaiting decision

    26 The Drive Barnet EN5 4JQ

    Single storey side and rear extension with 7no. rooflights

    31 Jul 2026 Householder
  • 26/2840/HSE Awaiting decision

    19 Wildwood Road London NW11 6UL

    Replacement of the existing front door, double glazing to existing windows and internal secondary glazing to front elevations; roof covering replacements, soffit and gutter repairs; security cameras, garden shed repairs and repainting, rear boundary hedges to 2.5m with concealed metal fencing

    31 Jul 2026 Householder
  • 26/2813/HSE Awaiting decision

    3 Delamere Gardens London NW7 3EA

    Single storey front extension incorporating a front porch, raising existing side extension floor level to match main house level, new roof with increased height to the side extension and 2no. rooflights, single storey rear extension with 4no. rooflights with new patio area, access steps to garden and hard and soft landscaping. Changes to fenestration: replacement of existing windows

    30 Jul 2026 Householder
  • 26/2812/HSE Awaiting decision

    60 Millway London NW7 3RA

    Two storey side extension linking to house and single storey rear infill extension following demolition of the existing garage. Associated alterations to roof

    30 Jul 2026 Householder
  • 26/2803/HSE Awaiting decision

    15 Poynings Way London N12 7LP

    Part single, part two storey side and rear extension. Conversion and extension of the existing garage, insertion of window to replace garage door. New front porch

    29 Jul 2026 Householder