24 Mountfield Road London N3 3NE

This site has had 2 applications since 2026.

• 26/0420/192 Awaiting decision

  24 Mountfield Road London N3 3NE

  Roof extension involving rear dormer window and 1no. rooflight

  Submitted 4 Feb 2026 Lawful development

1. 3 Feb 2026

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 31 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.

• 24 Mountfield Road London N3 3NE

  26/0420/192 Submitted 4 Feb 2026 50 yards away

  80% historically approved · decision due ~1 Apr

  Roof extension involving rear dormer window and 1no. rooflight

  Awaiting decision Lawful development Extension Loft or dormer +1 16 docs

• 44 Mountfield Road London N3 3NP

  26/1359/HSE Submitted 14 Apr 2026 100 yards away

  Existing rear extension parapet to be raised and capped with concrete coping stones. Green roof to new flat roof and addition of sliding doors and window to rear. Changes to side fenestration

  Granted Householder Extension Windows or glazing 17 docs
  Domestic

• 44A Mountfield Road London N3 3NP

  21/4968/FUL Submitted 14 Sep 2021 100 yards away

  Roof extension involving side and rear dormer window with Juliette Balcony

  Refused Full applications Extension Loft or dormer +1 9 docs

• 54 Stanhope Avenue London N3 3NA

  25/4207/PNH Submitted 21 Oct 2025 100 yards away

  Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 3.00m

  Refused Prior approval Extension 16 docs
  Small domestic

• 54 Stanhope Avenue London N3 3NA

  25/4208/192 Submitted 21 Oct 2025 100 yards away

  Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. rear and 4no. front facing rooflights. Erection of a rear outbuilding

  Granted Lawful development Extension Loft or dormer +1 19 docs

• 2 And 2A Mountfield Road London N3 3NB

  25/4445/FUL Submitted 7 Nov 2025 100 yards away

  63% historically approved · decision due ~12 Jan

  Conversion of existing 2no. dwellings into 4no. self-contained flats, including: Part single, part two storey rear extension; Roof extension involving creation of new mansard roof; Alterations to and conversion of existing garage to provide refuse and cycle storage; Provision of associated amenity space and off-street parking

  Awaiting decision Full applications New dwelling Extension +2 18 docs
  Several homes

• 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