17A Dollis Avenue London N3 1UD

1. 26 May 2026

   Received by Barnet

2. 25 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 21 July 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 45 days over the applications it decided in the last year.

This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided householder applications in a median of 56 days. More in our guide to how long planning decisions take.

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.

• 63 Church Crescent London N3 1BL

  26/0866/192 Submitted 6 Mar 2026 100 yards away

  Roof extension involving hip to gable and rear dormer window

  Granted Lawful development Extension Loft or dormer +1 8 docs

• 63 Church Crescent London N3 1BL

  26/0865/HSE Submitted 6 Mar 2026 100 yards away

  Single storey side and rear extension following demolition of the existing garage

  Granted Householder Extension Demolition 11 docs
  Small domestic

• 63 Church Crescent London N3 1BL

  26/2011/NMA Submitted 29 May 2026 100 yards away

  65% historically approved · decision due ~24 Jul

  Non material amendment to planning permission 26/0865/HSE dated 28/04/2026 for `Single storey side and rear extension following demolition of the existing garage.` Amendments include removal of the proposed window and door and addition of a side rooflight

  Awaiting decision Amendments Extension Loft or dormer +2 6 docs
  Small domestic

• 6 Kingswood Park London N3 1UG

  26/3279/HSE Submitted 8 Sep 2026 100 yards away

  77% historically approved · decision due ~4 Nov

  Single storey front infill extensions and relocation of existing front door including new access steps, alteration to existing garage door. 2no. single storey rear extensions with pitched roof following demolition of the existing conservatory. New side lightwell to basement level. Roof alterations, including raising of front gable pitch, formation of crown roof, 1no. front and 2no. rear dormer windows and new front window and 3 no. crown roof rooflights. Alterations to fenestration

  Decided Householder Extension Loft or dormer +3
  Small domestic

• 9 Dollis Avenue London N3 1UD

  TPP/0797/21 Submitted 5 Oct 2021 150 yards away

  1 x Common Lime (applicant's ref. T1) - Fell to ground level and grind out stump. Standing in Group G2 of Tree Preservation Order Provide replacement planting as follows: REPLACEMENT SPECIFICATION Location: Front of property Proposed species: Liquidambar styraciflua 'Worplesdon' Size: 14-16cm Extra Heavy Standard Type: Containerised or air pot container

  Refused Trees 4 docs

• 3 Grenville Close London N3 1UF

  26/1436/NMA Submitted 17 Apr 2026 150 yards away

  Non-material amendments to planning permission reference 26/0029/HSE dated 28/03/26 for 'Single Storey rear infill extension, first floor side extension.' Amendments include changes to fenestration to front and rear elevations

  Granted Amendments Extension Windows or glazing 4 docs
  Small domestic

• 26/3963/HSE Awaiting decision

  97 Morphou Road London NW7 1BG

  Alteration and extension to roof including insertion 2no. side facing rooflights

  Received 2 Nov, published by the council 3 Nov 2026 Householder
• 26/3953/HSE Awaiting decision

  51 Bedford Avenue Barnet EN5 2ER

  Single storey rear extension with flat roof, 1no. rooflight and new access steps following demolition of the existing conservatory. Removal of the rear chimney stack. Changes to ground floor north side fenestration

  2 Nov 2026 Householder
• 26/3947/HSE Awaiting decision

  20 Fallow Court Avenue London N12 0EB

  Single storey side and rear extension

  30 Oct 2026 Householder
• 26/3946/HSE Awaiting decision

  21 Selvage Lane London NW7 3SS

  Single storey front porch extension with pitched roof

  Received 30 Oct, published by the council 3 Nov 2026 Householder
• 26/3950/HSE Awaiting decision

  113 Walmington Fold London N12 7LH

  Single storey rear extension with pitched gable roof. New Pergola. Installation of Air Source Heat Pump (ASHP)

  Received 30 Oct, published by the council 2 Nov 2026 Householder