23 Sphinx Way Barnet EN5 2FG

1. 22 Jan 2026

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 19 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 46 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.

• Flats 189A And B 189 - 191 Mays Lane Barnet EN5 2DY

  20/1866/FUL Submitted 21 Apr 2020 200 yards away

  Alterations to existing 2no. first floor flats including a roof extension with 2no. rear dormer windows and 3no. side rooflights. The erection of a first floor rear extension with rooms in the roofspace to provide an additional 2no. self-contained residential units. Two storey side extension to enclose existing external staircase with refuse & cycle store

  Decided Full applications New dwelling Extension +2 48 docs

• 24 Minotaur Drive Barnet EN5 2FS

  26/2489/HSE Submitted 1 Jul 2026 250 yards away

  77% historically approved · decision due ~28 Aug

  Alteration and conversion of the existing loft space including 2no. front and rear facing rooflights

  Decided Householder Loft or dormer
  Domestic

• 65 Meadow Close Barnet EN5 2UF

  25/4574/HSE Submitted 17 Nov 2025 250 yards away

  77% historically approved · decision due ~12 Jan

  Single storey front extension

  Awaiting decision Householder Extension 5 docs
  Small domestic

• 83 Mays Lane Barnet EN5 2DX

  26/3261/192 Submitted 7 Sep 2026 250 yards away

  79% historically approved · decision due ~3 Nov

  Erection of a rear outbuilding

  Awaiting decision

• 146 Fitzjohn Avenue Barnet EN5 2HP

  26/1607/192 Submitted 29 Apr 2026 250 yards away

  New front porch. Changes to ground floor fenestration

  Granted Lawful development Extension Windows or glazing 3 docs
  Small domestic

• 146 Fitzjohn Avenue Barnet EN5 2HP

  26/1599/192 Submitted 28 Apr 2026 250 yards away

  Roof extension involving hip to gable, rear dormer window, front and side facing rooflights and new side gable window

  Granted Lawful development Extension Loft or dormer +1 4 docs

• 26/3853/HSE Awaiting decision

  30 Goldsmith Avenue London NW9 7HB

  Single storey rear extension following demolition of the existing extension

  23 Oct 2026 Householder
• 26/3856/HSE Awaiting decision

  229 Hale Drive London NW7 3EH

  Single storey rear extension

  23 Oct 2026 Householder
• 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
• 26/3841/HSE Awaiting decision

  Manor House West Heath Close London NW3 7NJ

  New metal framed pergola to upper ground floor rear terrace

  Received 22 Oct, published by the council 23 Oct 2026 Householder