20 Birchwood Avenue Wallington SM6 7EN

1. 15 Oct 2025

   Received by Sutton

2. 26 Nov 2025

   Decision issued: Prior Approval Not Required

3. 13 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 20 Birchwood Avenue Wallington SM6 7EN

  DM2025/01295 Submitted 15 Oct 2025 0m away

  Erection of single storey rear extension, conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to flank roofslope and rooflights to front roofslope.

  Granted Outline Extension Loft or dormer +1 8 docs
  Small domestic

• 20 Birchwood Avenue Wallington SM6 7EN

  DM2026/00294 Submitted 9 Mar 2026 0m away

  Prior Approval for a single storey rear extension projecting from the rear of the original house by 3.8m.

  Granted Householder Extension 10 docs
  Small domestic

• 20 Birchwood Avenue Wallington SM6 7EN

  DM2026/00293 Submitted 9 Mar 2026 3m away

  Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to flank roofslope and rooflights to front roofslope.

  Granted Outline Extension Loft or dormer +1 10 docs

• 28 Birchwood Avenue Wallington SM6 7EN

  DM2020/00340 Submitted 3 Mar 2020 27m away

  Erection of a single storey rear extension and the demolition of existing garage.

  Granted Householder Extension Demolition 15 docs
  Small domestic

• 23 Birchwood Avenue Wallington SM6 7EN

  DM2025/01334 Submitted 23 Oct 2025 43m away

  Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to flank roofslope and rooflights to front roofslope.

  Granted Outline Extension Loft or dormer +1 9 docs

• 11 Birchwood Avenue Wallington SM6 7HE

  DM2026/00128 Submitted 2 Feb 2026 56m away

  Erection of a single storey side and rear extension.

  Granted Householder Extension 13 docs
  Small domestic

• DM2026/00825 Refused

  4 Oakwood Wallington SM6 0RD

  Prior Approval for a single storey upwards extension projecting from the original house by 2.81m.

  7 Jul 2026 Householder
• DM2026/00600 Granted

  5 Waterer Rise Wallington SM6 9DN

  Erection of front boundary gates with walls, piers and railings.

  14 May 2026 Householder
• DM2026/00544 Granted

  18 Cheviot Close Sutton SM2 5SB

  Erection of a single storey front, side and rear extension.

  29 Apr 2026 Householder
• DM2026/00083 Granted

  53 Oxford Road Carshalton SM5 3QZ

  Erection of a part one, part two storey side and rear extension. Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.

  27 Jan 2026 Householder
• DM2026/00644 Granted

  37 Farm Way Worcester Park KT4 8RZ

  Erection of a single storey rear extension and conversion of the garage to a habitable room with associated external works.

  26 May 2026 Householder