24 Avondale Avenue Staines-upon-Thames TW18 2PN

1. 1 Oct 2026

   Received by Spelthorne

2. 8 Oct 2026

   Validated

   Checked as complete and ready for consideration.

3. 12 Oct 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 3 December 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Spelthorne took a median of 56 days over the applications it decided in the last year.

This application is with Spelthorne for determination, against a statutory target of eight weeks. Over the last year Spelthorne decided householder applications in a median of 58 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 38 Avondale Avenue Staines-upon-Thames TW18 2PN

  21/00858/HOU Submitted 21 May 2021 50 yards away

  (AMENDED DESCRIPTION) Single storey corner infill extension and conversion of integral garage into habitable accomodation

  Granted Householder Extension 8 docs
  Small domestic

• 10 St Olaves Close Staines-upon-Thames TW18 2LH

  26/00651/TPO Submitted 22 Jun 2026 50 yards away

  TPO031STA - Spanish Chestnut (Sweet Chestnut on form) - T1 - Reduce to the old points of reduction and includes all base and epicornic shoots on the trunk

  Granted Trees 7 docs

• 9 Avondale Avenue Staines-upon-Thames TW18 2PT

  26/00971/CPD Submitted 17 Sep 2026 100 yards away

  87% historically approved · decision due ~12 Nov

  Certificate of Lawfulness for proposed development for a garage conversion to habitable accommodation facilitated by replacement of existing garage door with UPVC double glazed windows and replacement of existing garage roof and installation of x2 Velux roof windows in main house roof and installation of new window in rear gable wall and internal alterations

  Awaiting decision Loft or dormer Windows or glazing

• 8 Avondale Avenue Staines-upon-Thames TW18 2PN

  19/01648/HOU Submitted 10 Dec 2019 100 yards away

  Erection of a single storey rear extension following demolition of existing conservatory and roof alterations to include raising the ridge height with hip to gable extensions and the installation of 2 no. front facing and 1 no. rear facing dormers.

  Granted Householder Extension Loft or dormer +2 14 docs
  Small domestic

• 39 Avondale Avenue Staines-upon-Thames TW18 2PL

  26/00785/HOU Submitted 24 Jul 2026 100 yards away

  Erection of single storey side and rear extension, new roof with ridge height increase, extension of front bay and changes to fenestration.

  Decided Householder Extension Roofing +1 9 docs
  Small domestic

• 119 Penton Road Staines-upon-Thames TW18 2LL

  25/01258/CPD Submitted 15 Oct 2025 150 yards away

  Certificate of Lawfulness for the proposed development of an outbuilding and front masonry boundary with gates

  Granted Lawful development 9 docs

• 26/00925/HOU Granted

  73A Parkland Grove Ashford TW15 2JF

  Conversion and extension of existing garage to provide a garden office with shower room with new roof

  Received 2 Sep, published by the council 18 Sep 2026 Householder
• 26/00894/HOU Granted

  288 Feltham Hill Road Ashford TW15 1LN

  Erection of a two-storey side extension and a part two-storey, part single storey rear extension. Loft conversion with 1 no. rear facing dormer and 4 no. rooflights. Front porch extension and new vehicle crossover with associated driveway alterations.

  Received 25 Aug, published by the council 31 Aug 2026 Householder
• 26/01090/HOU Awaiting decision

  12 Manor Park Staines-upon-Thames TW18 4XE

  Garage conversion into habitable space, facilitated by the bricking up of shutter door and 2 no. replacement windows and 2 no. rooflights in garage roof. External steel accessible ramp. Changes to fenestration. Internal accessible lift and associated alterations. New hardstanding on front driveway.

  Received 20 Oct, published by the council 21 Oct 2026 Householder
• 26/00900/HOU Granted

  36 Saddlebrook Park Sunbury-on-Thames TW16 7NG

  Erection of a single storey rear extension and new side door

  Received 26 Aug, published by the council 2 Sep 2026 Householder
• 26/00893/HOU Granted

  5 Camilla Close Sunbury-on-Thames TW16 7PZ

  Part retrospective single storey side extension

  Received 25 Aug, published by the council 2 Sep 2026 Householder