26 Blenheim Avenue Southampton SO17 1DU

1. 26 Jun 2026

   Validated

   Checked as complete and ready for consideration.

2. 25 Jul 2026

   Added to PlanIndex

3. 20 Aug 2026

   Decision issued: Approve with Conditions

4. 6 Sep 2026

   Status changed to Approved

   Previously Awaiting decision.

Southampton granted permission on 20 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 full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• 24 Blenheim Avenue Southampton SO17 1DU

  22/00039/TCA Submitted 9 Jun 2022 50 yards away

  T1 Cherry - this tree is in decline and has been dying back for a couple of years. remove this dying tree

  Granted Trees 3 docs

• 46 Blenheim Avenue Southampton SO17 1DU

  22/00054/TCA Submitted 17 Aug 2022 50 yards away

  Silver Birch Trees x3 - Crown reduction to each by 25% as shown in photo. Crown lifting to each to a height of 2.5m

  Granted Trees 3 docs

• 46 Blenheim Avenue Southampton SO17 1DU

  23/00007/TCA Submitted 12 Jan 2023 50 yards away

  1x silver birch - Fell

  Granted Trees 3 docs

• 6 Blenheim Avenue Southampton SO17 1DU

  26/00225/FUL Submitted 6 Mar 2026 50 yards away

  Installation of air conditioning unit to side of dwelling

  Granted Full applications 8 docs
  Domestic

• 6 Blenheim Avenue Southampton SO17 1DU

  22/01052/FUL Submitted 10 Aug 2022 50 yards away

  Erection of a single storey side/rear extension with associated fenestration changes, side dormer window to facilitate loft conversion, installation of solar panels and air source heat pump and replacement of the tarmac driveway and hardstanding area with permeable paving

  Granted Full applications Extension Loft or dormer +1 22 docs
  Small domestic

• 48 Blenheim Avenue Southampton SO17 1DU

  25/00052/TCA Submitted 12 Nov 2025 50 yards away

  T1 Norway Maple-Reduce and reshape by up to 3 metres. T2 Pyrus-Reduce height by 1 metre and reshape by 60 to 90cm. T3 Cherry-Reduce and reshape by 2 metres. T4 Amalanchia- Reduce height by 1 to 1.5 metres remove crossing branches and light reshaping 30 to 60 cm as required. T5 Snake Bark Maple -Reduce and reshape by 60 to 90cm.

  Granted Trees 4 docs

• 26/01053/FUL Awaiting decision

  Southampton General Hospital Tremona Road Southampton SO16 6YD

  Part-retrospective application for replacement external glazing to the Laboratory and Pathology Building (Levels C to F) and proposed replacement external glazing to the South Academic Block (Levels B and C) at Southampton General Hospital.

  Full applications
• 26/00950/FUL Awaiting decision

  32 Burnham Chase Southampton SO18 5DF

  Installation of accessible ramp and steps

  Full applications
• 26/00918/FUL Awaiting decision

  6 Harefield Road Southampton SO17 3TH

  Erection of a single storey rear extension.

  Full applications
• 26/00889/FUL Granted

  30 Coventry Road Southampton SO15 2GE

  Roof extension to create additional living space to facilitate change of use from house in multiple occupation (Class C4) to house in multiple occupation (Sui Generis) for occupancy up to 7 persons (amended).

  14 Sep 2026 Full applications
• 26/00845/FUL Refused

  17 Malvern Road Southampton SO16 6PZ

  Change of use from dwelling house (Class C3) to 7 bed house in multiple occupation (Class Sui Generis)

  14 Sep 2026 Full applications