18 Sydney Grove London NW4 2EH

1. 12 Mar 2026

   Received by Barnet

2. 13 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 6 May 2026

   Decision issued: Lawful

4. 25 Jul 2026

   Added to PlanIndex

Barnet granted permission on 6 May 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 16, 18 And 20 Sydney Grove London NW4 2EH

  25/4512/FUL Submitted 12 Nov 2025 0.1 miles away

  Part single, part two storey side / rear extensions to all three properties

  Withdrawn Full applications Extension 31 docs

• 16, 18 And 20 Sydney Grove London NW4 2EH

  25/4513/FUL Submitted 12 Nov 2025 0.1 miles away

  Part single, part two storey side / rear extensions to all three properties. Roof extension including hip to gable and 3no. rooflights to front roofslope of No.20 and rear dormer windows to Nos. 18 and 20

  Withdrawn Full applications Extension Loft or dormer +1 32 docs

• 16 Sydney Grove London NW4 2EH

  25/4514/HSE Submitted 12 Nov 2025 0.1 miles away

  Part single, part two storey side / rear extension

  Granted Householder Extension 27 docs
  Domestic

• 20 Sydney Grove London NW4 2EH

  26/0947/192 Submitted 12 Mar 2026 0.1 miles away

  Roof extension involving hip to gable with 1no. rear dormer window over main roof and 1no. rear dormer over outrigger roof and 2no. front facing rooflights

  Granted Lawful development Extension Loft or dormer +1 12 docs

• 16, 18 And 20 Sydney Grove London NW4 2EH

  25/4511/FUL Submitted 12 Nov 2025 0.1 miles away

  Part single, part two storey side / rear extensions to all three properties

  Granted Full applications Extension 30 docs

• 22 Sydney Grove London NW4 2EH

  25/4611/S73 Submitted 19 Nov 2025 0.1 miles away

  95% historically approved · decision due ~14 Jan

  Variation of condition 1 (Approved plans) pursuant to planning permission 25/2141/HSE dated 22/05/2025 for `Single storey rear extension following demolition of the existing conservatory and alterations to roof of existing single storey outrigger.` Amendments include enlarged rear extension with amended boundary

  Awaiting decision Conditions Extension Demolition 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
• 26/1907/191 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
• 26/2059/192 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
• 26/2066/192 Granted

  355 Hendon Way London NW4 3NB

  Roof extension involving rear dormer window and 3no. front facing rooflights. Removal of chimney on rear elevation (AMENDED DESCRIPTION)

  Received 3 Jun, published by the council 16 Aug 2026 Lawful development
• 26/2525/192 Granted

  39 Ridgeway Avenue Barnet EN4 8TN

  Single storey rear extension

  Received 6 Jul, published by the council 9 Aug 2026 Lawful development