240 Ashridge Way Sunbury-on-Thames TW16 7RS

1. 19 Feb 2026

   Received by Spelthorne

2. 30 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 16 April 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 lawful development applications in a median of 54 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.

• 176 Ashridge Way Sunbury-on-Thames TW16 7RS

  26/00940/CPD Submitted 7 Sep 2026 139m away

  88% historically approved · decision due ~2 Nov

  Certificate of lawfulness for proposed single storey detached outbuilding, following the demolition of existing outbuilding

  Awaiting decision Demolition
  Small domestic

• 170 Ashridge Way, Sunbury On Thames, TW16 7RS

  11/00376/HOU Submitted 25 May 2011 212m away

  Erection of a single-storey side and rear extension

  Granted Householder Extension 7 docs
  Small domestic

• 6 The Vale Sunbury-on-Thames TW16 7SD

  23/00226/HOU Submitted 23 Feb 2023 212m away

  Erection of first floor rear extension

  Refused Householder Extension 13 docs
  Domestic

• 4 The Vale Sunbury-on-Thames TW16 7SD

  25/01051/CPD Submitted 25 Aug 2025 218m away

  Certificate of lawfulness for proposed change of use from Dwellinghouse (Use Class C3) to small HMO (Use Class C4) with alterations to internal layout to accommodate 5 no. occupants. As shown on plan no's 4TVHMO - 001 (ex floor plans) 001 (prop floorplans), 002, 004 rec'd 25.08.2025.

  Refused Lawful development 11 docs
  Domestic

• 129 Ashridge Way Sunbury On Thames TW16 7SE

  21/00670/FUL Submitted 26 Apr 2021 244m away

  Use of Outbuilding as a residential unit

  Refused Full applications 11 docs

• 8 Keywood Drive Sunbury-on-Thames TW16 7QS

  23/00174/CPD Submitted 14 Feb 2023 282m away

  Certificate of Lawfulness for the proposed loft conversion facilitated by a rear dormer. Insertion of 2 no. rooflights on front roof slope and 2 no. rooflights on flat roof of dormer. Changes to ground floor fenestration.

  Granted Lawful development Loft or dormer Windows or glazing 16 docs

• 26/00452/CLD Granted

  177A Feltham Road Ashford TW15 1BB

  Certificate of Lawfulness for existing use of the ground floor flat as a small HMO (Use Class C4)

  4 May 2026 Lawful development
• 26/00200/CLD Granted

  73 Nursery Gardens Staines-upon-Thames TW18 1EL

  Certificate of Lawfulness to establish the lawful use of the property is as a House in Multiple Occupation (Use Class C4) for up to six occupants. As shown on site location plan and block plan no EX-1003 and Pre-Existing Floor Plans (Page 01 of 02) and Existing Floor Plans (Page 02 of 02) received 27.02.2026.

  26 Feb 2026 Lawful development
• 26/00383/CPD Refused

  13 Meadow Road Ashford TW15 1PL

  Certificate of lawfulness for proposed change of use from a 6 Person HMO (Class C4) to a 7 Person HMO (Sui-Generis)

  14 Apr 2026 Lawful development
• 26/00437/CLD Refused

  4 Sunmead Road Sunbury-on-Thames TW16 6PE

  Certificate of Existing Lawfulness for the conversion of a C3 dwellinghouse to a C4 small 6-person HMO.

  28 Apr 2026 Lawful development
• 26/00575/CLD Refused

  96 Groveley Road Sunbury-on-Thames TW16 7LB

  Certificate of Lawfulness for an existing development and use for a ground floor rear extension, roof alterations including a rear roof dormer and a hip to gable conversion with insertion of rooflights, and use as a small HMO (use class C4)

  2 Jun 2026 Lawful development