4 Thornbury Avenue Southampton SO15 5BR

1. 13 Aug 2026

   Received by Southampton

2. 17 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 8 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Southampton took a median of 55 days over the applications it decided in the last year.

This application is with Southampton for determination, against a statutory target of eight weeks. Over the last year Southampton decided lawful development applications in a median of 56 days. More in our guide to how long planning decisions take.

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.

• 2A Thornbury Avenue Southampton City Of Southampton SO15 5BR

  22/00584/ELDC Submitted 13 Apr 2022 50 yards away

  Application for a lawful development certificate for existing use as a sui generis house in multiple occupation (HMO) for 8 persons.

  Granted Lawful development 5 docs

• 2B Thornbury Avenue Southampton City Of Southampton SO15 5BR

  23/00503/ELDC Submitted 19 Apr 2023 50 yards away

  95% historically approved · decision due ~14 Jun

  Application for a lawful development certificate for existing use as a sui generis house in multiple occupation (HMO) for 7 persons.

  Awaiting decision Lawful development 2 docs

• Flats 2 and 4 15 Thornbury Avenue Southampton SO15 5BQ

  24/00937/ELDC Submitted 7 Aug 2024 50 yards away

  Application for a lawful development certificate for existing conversion of maisonette into 2 flats (1x2 and 1x1 bed).

  Granted Lawful development New dwelling 5 docs
  Several homes

• 39 Thornbury Avenue Southampton SO15 5BQ

  24/00880/DIS Submitted 12 Aug 2024 50 yards away

  Application for approval of details reserved by conditions 3(Refuse) and 4(Cycle storage) of permission 21/01649/FUL for dwelling & annexe

  Granted Conditions 5 docs
  Domestic

• 39 Thornbury Avenue Southampton SO15 5BQ

  26/00312/FUL Submitted 17 Apr 2026 50 yards away

  Change of use from Residential Dwelling (Class C3) to Hotel (Class C1)

  Refused Full applications 6 docs
  Domestic

• 36 Thornbury Avenue Southampton SO15 5BR

  21/01071/FUL Submitted 14 Jul 2021 100 yards away

  Removal of condition 3 sought to remove the personal restriction of the business and variation of condition 4 sought to increase staff members on planning permission ref. 05/00382/FUL.

  Granted Full applications 7 docs

• 26/01031/PLDC Awaiting decision

  231 Winchester Road Southampton SO16 6TP

  Application for a lawful development certificate for proposed use of part of the premises for pet care and treatment facility.

  Received 8 Sep, published by the council 10 Sep 2026 Lawful development
• 26/00980/PLDC Awaiting decision

  Unit C Atlantic Works Oakley Road Southampton SO16 4LL

  Application for a lawful development certificate for proposed use as indoor sport, recreation or fitness (Class E(d)).

  Received 21 Aug, published by the council 27 Aug 2026 Lawful development
• 26/00954/ELDC Awaiting decision

  5 Windrush Road Southampton SO16 9DE

  Application for a lawful development certificate for the existing use as a house in multiple occupation (HMO, Class C4).

  Received 17 Aug, published by the council 24 Aug 2026 Lawful development
• 26/00650/PLDC Refused

  158 Millbrook Road East Southampton SO15 1JR

  Application for a lawful development certificate for proposed use as offices (use class E).

  Received 4 Jun, published by the council 25 Jul 2026 Lawful development
• 26/00626/ELDC Granted

  82 Newcombe Road Southampton SO15 2FS

  Application for a lawful development certificate for the existing use as a house in multiple occupation (HMO, Class C4).

  Received 29 May, published by the council 25 Jul 2026 Lawful development