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Planning application

17 Lyonsdown Avenue Barnet EN5 1DU

Awaiting decision Barnet 26/2929/HSE Householder

Works: Extension Demolition 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

Single storey front/side extension following demolition of the existing garage and the insertion of 1No front window (AMENDED DESCRIPTION)

As published by the council, reference 26/2929/HSE

Application record

Reference
26/2929/HSE
Category
Householder
Status
Pending Consideration
Received
7 Aug 2026
Validated
10 Aug 2026
Postcode
EN5 1DU

Timeline

Dates from the published record

  1. 7 Aug 2026

    Received by Barnet

  2. 10 Aug 2026

    Validated

    Checked as complete and ready for consideration.

  3. 10 Aug 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 5 October 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 42 days over the applications it decided in the last year.

What happens while it is decided

The process from here

This application is with Barnet for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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

  • 29 Monks Avenue Barnet EN5 1BZ

    26/1299/HSE Submitted 8 Apr 2026 122m away

    77% historically approved · decision due ~3 Jun

    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

    Awaiting decision Householder Extension Demolition 9 docs
    Small domestic

  • 29 Monks Avenue Barnet EN5 1BZ

    26/0605/192 Submitted 17 Feb 2026 122m away

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

    Decided Lawful development Extension Loft or dormer +1 8 docs

  • 96 Longmore Avenue Barnet EN5 1JY

    26/2300/HSE Submitted 18 Jun 2026 124m away

    77% historically approved · decision due ~13 Aug

    Single storey rear extension with raised patio and associated privacy screens. Side and front extension and new front porch following the demolition of existing garage, conservatory and shed

    Awaiting decision Householder Extension Demolition
    Small domestic

  • 96 Longmore Avenue Barnet EN5 1JY

    25/4714/HSE Submitted 25 Nov 2025 132m away

    77% historically approved · decision due ~21 Jan

    Single storey side and rear extension with new patio area with associated steps following demolition of the existing conservatory, garage and shed. Single storey front porch extension

    Awaiting decision Householder Extension Demolition 10 docs
    Small domestic

  • 8 Eversleigh Road Barnet EN5 1NE

    25/4038/192 Submitted 6 Oct 2025 166m away

    79% historically approved · decision due ~2 Dec

    Raised decking area with access steps and associated railings and balustrades to existing patio. New fence to side of patio area

    Awaiting decision Lawful development 2 docs
    Small domestic

  • 41 Lyonsdown Avenue Barnet EN5 1DX

    26/1423/HSE Submitted 17 Apr 2026 173m away

    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

    Refused Householder Extension Windows or glazing 16 docs
    Small domestic

In Barnet

  • 26/3235/HSE Awaiting decision

    26 Mount Pleasant Barnet EN4 9HH

    Replace existing flat roof at ground floor rear elevation with pitched roof and 2no. rooflights

    4 Sep 2026 Householder
  • 26/3222/HSE Awaiting decision

    46 Michleham Down London N12 7JN

    Single storey side/rear extension with 3no. rooflights following demolition of the existing storage/utility structure. Changes to fenestration

    3 Sep 2026 Householder
  • 26/3219/HSE Awaiting decision

    53 Tudor Road Barnet EN5 5NW

    First floor rear extension with front and rear rooflights. Roof extension over existing garage

    2 Sep 2026 Householder
  • 26/3210/HSE Awaiting decision

    47 Pattison Road London NW2 2HL

    New front vehicular access to provide off-street parking. Removal of existing gate and shed, alterations to the existing front boundary wall and installation of close board fencing panels.

    2 Sep 2026 Householder
  • 26/3211/HSE Awaiting decision

    25 The Ridgeway London N11 3LG

    Single storey rear extension with 3no. rooflights following the demolition of existing conservatory

    2 Sep 2026 Householder