40 Strathnairn Street London Southwark SE1 5BL

This site has had 2 applications since 2026: 1 approved, 0 refused.

• 26/AP/2405 Awaiting decision

  40 Strathnairn Street London Southwark SE1 5BL

  Construction of a single-storey rear extension; rear dormer roof extension with a Juliet balcony, and replacement of existing first-floor rear windows.

  Submitted 12 Aug 2026

1. 18 May 2026

   Received by Southwark

2. 19 May 2026

   Validated

   Checked as complete and ready for consideration.

3. 25 Jul 2026

   Added to PlanIndex

4. 4 Aug 2026

   Decision issued: Certificate of Lawfulness Prop- GRANTED

Southwark granted permission on 4 August 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.

• 40 Strathnairn Street London Southwark SE1 5BL

  26/AP/2405 Submitted 12 Aug 2026 4m away

  95% historically approved · decision due ~29 Oct

  Construction of a single-storey rear extension; rear dormer roof extension with a Juliet balcony, and replacement of existing first-floor rear windows.

  Awaiting decision Extension Loft or dormer +1
  Small domestic

• 38 Strathnairn Street London Southwark SE1 5BL

  20/AP/2230 Submitted 7 Aug 2020 5m away

  The construction of a single storey rear extension; the addition of a Juliet balcony and two windows to the rear elevation and one window to the front; and alterations to the fenestration of the front porch.

  Granted Householder Extension Windows or glazing 24 docs
  Small domestic

• 10 Strathnairn Street London Southwark SE1 5BL

  22/AP/3285 Submitted 15 Sep 2022 46m away

  Construction of a ground floor rear extension and the installation of a roof light.

  Granted Householder Extension Loft or dormer 16 docs
  Domestic

• 10 Strathnairn Street London Southwark SE1 5BL

  22/AP/1542 Submitted 29 Apr 2022 46m away

  Construction of a part single storey part two storey extension to the rear and the installation of a roof light.

  Granted Householder Extension Loft or dormer 13 docs
  Small domestic

• 42 Trothy Road London Southwark SE1 5RR

  22/AP/1737 Submitted 19 May 2022 51m away

  Construction of a two storey side extension, single storey rear extension and rear dormer extension with a Juliet balcony and the addition of 4 rooflights to the front roof slope.

  Granted Householder Extension Loft or dormer 15 docs
  Small domestic

• 17 Trothy Road London Southwark SE1 5RR

  20/AP/2297 Submitted 13 Aug 2020 68m away

  Certificate of Lawful Development (Proposed) for the demolition existing conservatory and the construction of a new 3m deep rear extension, retractable hoarding, new decking, new pergola and new shed.

  Granted Lawful development Extension Demolition 25 docs
  Small domestic

• 26/AP/1673 Granted

  Flat 67 Benbow House 24 New Globe Walk London Southwark SE1 9DS

  Certificate of Lawful Development to replace existing external doors with new thermally improved doors

  Received 11 Jun, published by the council 25 Jul 2026 Lawful development
• 26/AP/1909 Granted

  6 Ethnard Road London Southwark SE15 1RU

  Certificate of lawfulness (proposed) for a loft conversion with rear dormer

  Received 30 Jun, published by the council 25 Jul 2026 Lawful development
• 26/AP/1759 Granted

  29 Dundas Road London Southwark SE15 2DR

  Certificate of Lawful Development (Proposed) for loft conversion with rear dormer, installation of roof lights to front roof slope, construction of a rear outbuilding, fenestration changes including new and replacement windows and installation of soil vent pipe.

  Received 17 Jun, published by the council 25 Jul 2026 Lawful development
• 26/AP/1942 Granted

  Peckham Rye Railway Station Station Way London Southwark SE15 4RX

  Certificate of lawfulness (existing) to confirm that planning permission 22/AP/1006 was lawfully implemented within the prescribed time period

  Received 3 Jul, published by the council 25 Jul 2026 Lawful development
• 26/AP/1625 Granted

  97 - 99 Borough High Street Southwark SE1 1NL

  Certificate of Lawful development (proposed) for: Like for like replacement of the existing Zinc Cladding, for non combustible insulation, behind the cladding and replacement external like for like (new) zinc cladding; and like for like replacement of the penthouse terrace decking and the balcony decking to the rear.

  Received 8 Jun, published by the council 25 Jul 2026 Lawful development