42 Lyonsdown Avenue Barnet EN5 1DX

1. 27 Jan 2026

   Received by Barnet

2. 29 Jan 2026

   Validated

   Checked as complete and ready for consideration.

3. 10 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 26 March 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.

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.

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

• 59 Lyonsdown Avenue Barnet EN5 1DX

  26/2575/HSE Submitted 8 Jul 2026 66m away

  77% historically approved · decision due ~7 Sep

  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

  Awaiting decision Householder Extension Loft or dormer +1
  Small domestic

• 41 Lyonsdown Avenue Barnet EN5 1DX

  26/1423/HSE Submitted 17 Apr 2026 109m 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

• 41 Lyonsdown Avenue Barnet EN5 1DX

  25/5008/HSE Submitted 15 Dec 2025 109m away

  77% historically approved · decision due ~9 Feb

  Single storey rear extension with new raised patio area and associated access steps

  Awaiting decision Householder Extension 13 docs
  Small domestic

• 6 Willenhall Avenue Barnet EN5 1JN

  26/0137/HSE Submitted 14 Jan 2026 112m away

  77% historically approved · decision due ~11 Mar

  Single storey side extension with 2no. rooflights following demolition of the existing garage and external store

  Awaiting decision Householder Extension Loft or dormer +1 8 docs
  Small domestic

• 79 Monks Avenue Barnet EN5 1DA

  25/5201/HSE Submitted 30 Dec 2025 138m away

  77% historically approved · decision due ~4 Mar

  First floor side/rear extension. Roof extension involving rear dormer window

  Awaiting decision Householder Extension Loft or dormer +1 6 docs
  Domestic

• 1522 High Road London N20 9PT

  25/4144/CON Submitted 15 Oct 2025 165m away

  95% historically approved · decision due ~11 Dec

  Submission of details of condition 7 (Cycle parking/storage) 20 (Refuse/recycling storage) pursuant to planning permission 23/5309/FUL dated 12/02/2024

  Awaiting decision Conditions 2 docs

• 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