15 Blackett Street SW15 1QG

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

• 2026/0321 Granted

  15 Blackett Street SW15 1QG

  Alterations including the erection of a single-storey ground floor rear/side extension and a full width mansard roof extension to the main rear roof slope with French doors and safety balustrade

  Decided 19 Mar 2026 Householder

1. 23 Jan 2026

   Received by Wandsworth

2. 3 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 19 Mar 2026

   Decision issued: Approve No Conditions

4. 10 Aug 2026

   Added to PlanIndex

Wandsworth granted permission on 19 March 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.

• 15 Blackett Street SW15 1QG

  2026/0321 Submitted 23 Jan 2026 50 yards away

  Alterations including the erection of a single-storey ground floor rear/side extension and a full width mansard roof extension to the main rear roof slope with French doors and safety balustrade

  Granted Householder Extension Loft or dormer +1 10 docs
  Small domestic

• 5 Blackett Street SW15 1QG

  2025/3745 Submitted 20 Oct 2025 50 yards away

  Alterations including erection of dormer roof extension to main rear roof and extension above two-storey back addition.

  Granted Householder Extension Loft or dormer 10 docs
  Domestic

• 22 A Hotham Road SW15 1QB

  2019/4474 Submitted 16 Oct 2019 50 yards away

  Erection of a roof extension to main rear roof and above part of rear two-storey addition.

  Granted Full applications Extension 9 docs

• 26 A Blackett Street SW15 1QG

  2024/3603 Submitted 21 Oct 2024 50 yards away

  Alterations including erection of a mansard roof extension the main roof with french doors and safety balustrade and erection of extension above part of two-storey rear addition.

  Refused Full applications Extension Loft or dormer +1 8 docs

• 11 A Borneo Street SW15 1QQ

  2026/0984 Submitted 11 Mar 2026 50 yards away

  Alterations including mansard extension to main rear roof slope with French doors and safety railing, raising the ridge by 150mm and extension above rear addition forming a roof terrace with 1.7m obscure glazed balustrade.

  Granted Full applications Extension Loft or dormer +1 7 docs

• 12 Hotham Road SW15 1QB

  2026/1235 Submitted 30 Mar 2026 50 yards away

  87% historically approved · decision due ~25 May

  LOCATION: 12 Hotham Road, SW15 1QB PROPOSAL: Front Garden: T1 Lime - Crown reduce by up to 1.5m.

  Awaiting decision Trees

• 2026/0002 Refused

  Flat First Floor 44 Lavender Gardens SW11 1DN

  Use as HMO (Class C4).

  Received 2 Jan, published by the council 29 Jul 2026 Lawful development
• 2026/3244 Withdrawn

  110 Earlsfield Road SW18 3DR

  Erection of an extension above the two storey back addition.

  Received 10 Sep, published by the council 21 Sep 2026 Lawful development
• 2026/1219 Granted

  45 Lynwood Road SW17 8SB

  Use of property as a childrens home with revised staffing arrangements.

  Received 27 Mar, published by the council 29 Jul 2026 Lawful development
• 2026/3093 Withdrawn

  206 Franciscan Road SW17 8HG

  Erection of an extension to the main rear roof and installation of 3 x rooflights to the front roof slope.

  Received 27 Aug, published by the council 30 Aug 2026 Lawful development
• 2026/2114 Granted

  145 Wakehurst Road SW11 6BW

  Internal alterations to reconfigure ground floor and provide protected means of escape.

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