18 Helenslea Avenue London NW11 8ND

This site has had 2 applications since 2025.

• 26/0068/192 Awaiting decision

  18 Helenslea Avenue London NW11 8ND

  Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

  Submitted 8 Jan 2026 Lawful development

1. 15 Dec 2025

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 9 February 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.

• 18 Helenslea Avenue London NW11 8ND

  26/0068/192 Submitted 8 Jan 2026 50 yards away

  80% historically approved · decision due ~5 Mar

  Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

  Awaiting decision Lawful development Extension Loft or dormer +1 8 docs

• 68 Hodford Road London NW11 8NG

  26/0131/192 Submitted 14 Jan 2026 100 yards away

  80% historically approved · decision due ~11 Mar

  Two storey rear extension. Erection of a rear outbuilding. Roof extension involving insertion of 2no. front and rear facing rooflights following removal of the existing rear dormer window. Changes to fenestration

  Awaiting decision Lawful development Extension Loft or dormer +1 3 docs

• 68 Hodford Road London NW11 8NG

  25/3877/192 Submitted 20 Sep 2025 100 yards away

  80% historically approved · decision due ~18 Nov

  Roof extension including side dormer window, 2no. front and rear facing rooflights and new side gable window. Two storey rear extension. Erection of a rear outbuilding

  Awaiting decision Lawful development Extension Loft or dormer +1 3 docs

• 26 Dunstan Road London NW11 8AA

  25/4661/HSE Submitted 21 Nov 2025 100 yards away

  Single storey rear infill extension

  Granted Householder Extension 13 docs
  Small domestic

• 1A Helenslea Avenue London NW11 8NE

  24/1583/S73 Submitted 22 Apr 2024 100 yards away

  Variation of condition 10 (Hours of Use) of planning permission reference 20/6048/FUL dated 08/12/2021 for 'Demolition of existing building and construction of new Sassov Synagogue comprising of basement, part-one storey and part-two storey building. Demolition of Mikve (religious bath) and storage buildings. Provision of disabled parking spaces and cycle parking. New soft and hard landscape and associated site works.' Variation to include changing the wording of the condition to read 'The use hereby permitted shall not be open to members of the public before 06:30 or after 23:00, with the exception of the first night of Shavuot and the eve of Rosh Hashanah.'

  Granted Conditions Demolition 14 docs

• 52 Hodford Road London NW11 8NJ

  26/2893/NMA Submitted 5 Aug 2026 150 yards away

  65% historically approved · decision due ~30 Sep

  Non material amendment to planning permission 25/2474/HSE dated 22/09/2025 for 'Part single, part two storey side and rear extension. Front extension and conversion of the existing garage into habitable room, including insertion of window and door to replace garage door. Replacement of existing windows. Roof extension involving rear dormer window.'. Amendments includes changing material of proposed extension to traditional brick red and reconciling the window dimensions, to balance the rear elevation to have equal sized windows

  Decided Amendments Extension Loft or dormer +1

• 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