9 Mayfield Gardens London NW4 2PY

This site has had 2 applications since 2026.

• 26/3754/HSE Awaiting decision

  9 Mayfield Gardens London NW4 2PY

  Part single, part two storey rear extension. Single side extension. New front porch. Alterations and extension to roof including side and rear dormer windows and front, side and rear rooflights

  Submitted 16 Oct 2026 Householder

1. 16 Oct 2026

   Received by Barnet

2. 19 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 11 December 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.

• 9 Mayfield Gardens London NW4 2PY

  26/3754/HSE Submitted 16 Oct 2026 50 yards away

  77% historically approved · decision due ~11 Dec

  Part single, part two storey rear extension. Single side extension. New front porch. Alterations and extension to roof including side and rear dormer windows and front, side and rear rooflights

  Awaiting decision Householder Extension Loft or dormer +1
  Small domestic

• 31 Haslemere Avenue London NW4 2PU

  26/2487/HSE Submitted 1 Jul 2026 100 yards away

  77% historically approved · decision due ~26 Aug

  Single storey front extension with new porch with canopy and front bay window. Part single, part two storey side and rear wraparound extensions with new rear raised terrace area with access steps to garden, 1no. rooflight and new roof. New hardstanding and alteration to the existing vehicular access to off-street parking. New side gate. Roof extension involving hip to gable to both sides, rear dormer windows, 3no. front and 1no. rear facing rooflights and new side gable window. Changes to fenestration.

  Decided Householder Extension Loft or dormer +2
  Small domestic

• 15 Haslemere Avenue London NW4 2PU

  26/2534/HSE Submitted 6 Jul 2026 100 yards away

  Single storey front, side and rear extension with new patio area. Two storey side and rear extension with first floor juliette balcony with glass balustrade

  Refused Householder Extension
  Small domestic

• 15 Haslemere Avenue London NW4 2PU

  26/1594/192 Submitted 28 Apr 2026 100 yards away

  Erection of a rear outbuilding

  Granted Lawful development 5 docs

• 31 Haslemere Avenue London NW4 2PU

  26/0503/192 Submitted 9 Feb 2026 150 yards away

  Roof extension involving raised gables, rear dormer window, 3no. front facing rooflights and new side gable window

  Granted Lawful development Extension Loft or dormer +1 5 docs

• 31 Haslemere Avenue London NW4 2PU

  26/1092/HSE Submitted 23 Mar 2026 150 yards away

  Single storey front and side extension and part single, part two storey rear extension

  Granted Householder Extension 11 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