55 Lyonsdown Avenue Barnet EN5 1DX

1. 27 Jul 2021

   Received by Barnet

2. 1 Dec 2021

   Decision issued: Approve subject to conditions

3. 25 Sep 2026

   Added to PlanIndex

Barnet granted permission on 1 December 2021, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 79 Monks Avenue Barnet EN5 1DA

  25/5201/HSE Submitted 30 Dec 2025 50 yards 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

• 59 Lyonsdown Avenue Barnet EN5 1DX

  26/2575/HSE Submitted 8 Jul 2026 50 yards 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 double glazed timber windows to side and rear.

  Decided Householder Extension Loft or dormer +1
  Small domestic

• 42 Lyonsdown Avenue Barnet EN5 1DX

  26/0305/HSE Submitted 27 Jan 2026 100 yards away

  77% historically approved · decision due ~26 Mar

  Part single, part two storey side and rear extension with new patio area with pergola following demolition of the existing single storey structures

  Awaiting decision Householder Extension Demolition 18 docs
  Small domestic

• 26 Northumberland Road Barnet EN5 1ED

  26/3765/HSE Submitted 19 Oct 2026 100 yards away

  77% historically approved · decision due ~14 Dec

  Single storey rear extension with mono-pitch roof and solar panels and new patio area and access steps. Insertion of new side window and replacement of existing side door.

  Awaiting decision Householder Extension Windows or glazing
  Small domestic

• 41 Lyonsdown Avenue Barnet EN5 1DX

  26/1423/HSE Submitted 17 Apr 2026 100 yards 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 17 docs
  Small domestic

• 41 Lyonsdown Avenue Barnet EN5 1DX

  25/5008/HSE Submitted 15 Dec 2025 100 yards 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

• 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
• 26/3815/HSE Awaiting decision

  17 Hurstwood Road London NW11 0AS

  Single storey rear extension

  21 Oct 2026 Householder
• 26/3800/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.

  Received 20 Oct, published by the council 21 Oct 2026 Householder
• 26/3791/HSE Awaiting decision

  149 Montrose Avenue Edgware HA8 0DZ

  New front hardstanding and vechicular access to provide off-street parking

  Received 20 Oct, published by the council 21 Oct 2026 Householder