25 Gresham Avenue London N20 0XJ

1. 8 Sep 2025

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 3 November 2025, 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 lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 24 Gresham Avenue London N20 0XL

  26/0725/192 Submitted 25 Feb 2026 100 yards away

  Erection of a rear outbuilding

  Granted Lawful development 5 docs

• 4 Friars Avenue London N20 0XH

  26/2125/HSE Submitted 8 Jun 2026 100 yards away

  77% historically approved · decision due ~19 Aug

  Alterations to roof involving addition of a front dormer window. Replacement of existing rear fenestration with bi-folding doors and a window. Partial conversion of garage into habitable room. (amended description and updated drawings)

  Awaiting decision Householder Loft or dormer Windows or glazing 11 docs
  Domestic

• 24 Gresham Avenue London N20 0XL

  26/2265/HSE Submitted 17 Jun 2026 100 yards away

  Two storey side extension, single storey rear extension and extension and lowering of existing basement. New raised rear terrace, alterations to boundary treatment including privacy screening with associated hard and soft landscaping

  Refused Householder Extension
  Small domestic

• 91 Manor Drive London N20 0XD

  26/1294/HSE Submitted 7 Apr 2026 150 yards away

  77% historically approved · decision due ~2 Jun

  Single storey rear extension with 4no. rooflights following demolition of the existing bay window (AMENDED DESCRIPTION)

  Awaiting decision Householder Extension Loft or dormer +2 4 docs
  Small domestic

• 11A Friars Avenue London N20 0XE

  26/2792/HSE Submitted 29 Jul 2026 150 yards away

  77% historically approved · decision due ~23 Sep

  Conversion of the existing garage into habitable room and incorporation into the main dwelling, including replacement of the garage door with arched window and associated alterations to the side and rear elevations

  Decided Householder Windows or glazing
  Domestic

• 27 Friars Avenue London N20 0XE

  26/2233/192 Submitted 15 Jun 2026 200 yards away

  Single storey rear extension with 2no. rooflights following partial demolition of the existing rear extension (amended)

  Granted Lawful development Extension Loft or dormer +1 9 docs
  Small domestic

• 26/2679/192 Granted

  21 Myddelton Park London N20 0JH

  Single storey rear extension and increase in ridge height of existing rear outrigger (Amended description).

  Received 20 Jul, published by the council 7 Aug 2026 Lawful development
• 26/1362/191 Refused

  145 Cotswold Gardens London NW2 1PL

  Use as a House in Multiple Occupation (HMO) for 6 people

  Received 14 Apr, published by the council 25 Jul 2026 Lawful development
• 26/1907/191 Granted

  8 Golders Manor Drive London NW11 9HT

  Use of the property as a self-contained residential unit at ground floor level and the first and second floors as a 4-bedroom, 4-person House in Multiple Occupation (Sui Generis) (AMENDED DESCRIPTION)

  Received 21 May, published by the council 16 Aug 2026 Lawful development
• 26/2392/192 Refused

  6 Mostyn Road Edgware HA8 0JD

  New front hardstanding and vehicular access to provide off-street parking

  Received 23 Jun, published by the council 9 Aug 2026 Lawful development
• 26/2059/192 Refused

  Low Ridge Rowley Lane Barnet EN5 3HS

  Erection of a rear outbuilding

  Received 3 Jun, published by the council 16 Aug 2026 Lawful development