40 Strathnairn Street London Southwark SE1 5BL

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

• 26/AP/2405 Decided

  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 50 yards 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.

  Decided Extension Loft or dormer +1
  Small domestic

• 38 Strathnairn Street London Southwark SE1 5BL

  20/AP/2230 Submitted 7 Aug 2020 50 yards 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

• 183 Simms Road London Southwark SE1 5LP

  21/AP/3573 Submitted 12 Oct 2021 50 yards away

  Construction of a single storey rear extension (to replace the existing) and the installation of one ground floor window to the side elevation of the original property.

  Granted Householder Extension Windows or glazing 16 docs
  Small domestic

• 12 Strathnairn Street London Southwark SE1 5BL

  21/AP/3798 Submitted 3 Nov 2021 50 yards away

  Hip to gable roof extension and rear dormer roof extension.

  Granted Lawful development Extension Loft or dormer 8 docs

• 12 Strathnairn Street London Southwark SE1 5BL

  21/AP/3796 Submitted 2 Nov 2021 50 yards away

  Construction of single storey ground floor rear extension complete with two roof lights, single storey first floor side extension, porch construction, front door relocation and alterations to the fenestration of the property.

  Granted Householder Extension Loft or dormer +1 16 docs
  Small domestic

• 10 Strathnairn Street London Southwark SE1 5BL

  22/AP/3285 Submitted 15 Sep 2022 50 yards away

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

  Granted Householder Extension Loft or dormer 16 docs
  Domestic

• 26/AP/2509 Awaiting decision

  Newington Gardens Harper Road London Southwark SE1

  Certificate of Lawfulness (proposed) for improvement works to the playground at Newington Gardens to include the removal of current playground equipment and installation of new accessible equipment.

  Received 21 Aug, published by the council 7 Sep 2026 Lawful development
• 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