350 Cassiobury Drive Watford WD17 3AW

This site has had 5 applications since 2023: 4 approved, 0 refused.

• 25/00222/NONMAT Granted

  350 Cassiobury Drive Watford WD17 3AW

  Non material amendment for proposed raising for roof line by 225mm and including brick courses above the windows pursuant to planning permission 23/01007/FUL.

  Decided 19 May 2025 Amendments
• 24/00174/NONMAT Granted

  350 Cassiobury Drive Watford WD17 3AW

  Non material amendment pursuant to planning permission 23/01007/FUL - changes to fenestration window sizes and positions.

  Decided 7 Mar 2024 Amendments
• 24/00070/DISCON Granted

  350 Cassiobury Drive Watford WD17 3AW

  Details submitted for Condition 3 (Materials) pursuant to planning permission 23/01007/FUL

  Decided 15 Feb 2024 Conditions
• 23/01007/FUL Granted

  350 Cassiobury Drive Watford WD17 3AW

  Part retrospective application for the demolition of existing dwelling house and erection of a replacement dwelling house (amended drawings received - single storey element amendment at the rear).

  Decided 10 Jan 2024 Full applications

1. 27 Apr 2026

   Received by Watford

2. 5 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 26 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 31 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Watford took a median of 53 days over the applications it decided in the last year.

This application is with Watford for determination, against a statutory target of eight weeks. Over the last year Watford decided householder applications in a median of 55 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.

• 346 And 348 Cassiobury Drive Watford WD17 3AW

  26/00690/FULH Submitted 28 Aug 2026 50 yards away

  82% historically approved · decision due ~4 Nov

  Erection of single storey and first floor rear extensions to the existing dwelling, alterations to the existing roof and associated internal and external alterations, with retention of the existing garage at No 346 and Erection of single storey and first floor rear extensions to the existing dwelling, conversion of the roof space to provide additional habitable accommodation, installation of front and rear dormer windows and rooflights, alterations to the existing roof and associated internal and external alterations at No.348

  Awaiting decision Householder Extension Loft or dormer +1 22 docs
  Small domestic

• 348 Cassiobury Drive Watford WD17 3AW

  25/00155/FULH Submitted 24 Feb 2025 50 yards away

  Erection of a first floor rear extension with pitched roof linked to existing habitable loft space

  Granted Householder Extension 17 docs
  Domestic

• 350 Cassiobury Drive Watford Hertfordshire WD17 3AW

  22/00940/FULH Submitted 28 Jul 2022 50 yards away

  Proposed double storey side and rear extensions with associated roof works. Single storey rear extension.

  Granted Householder Extension 7 docs
  Small domestic

• 350 Cassiobury Drive Watford Hertfordshire WD17 3AW

  22/00935/FULH Submitted 27 Jul 2022 50 yards away

  Erection of double storey side and rear extensions with hipped roof detail.

  Granted Householder Extension 15 docs
  Domestic

• 350 Cassiobury Drive Watford WD17 3AW

  25/00222/NONMAT Submitted 10 Mar 2025 50 yards away

  Non material amendment for proposed raising for roof line by 225mm and including brick courses above the windows pursuant to planning permission 23/01007/FUL.

  Granted Amendments Windows or glazing 12 docs

• 350 Cassiobury Drive Watford WD17 3AW

  24/00174/NONMAT Submitted 28 Feb 2024 50 yards away

  Non material amendment pursuant to planning permission 23/01007/FUL - changes to fenestration window sizes and positions.

  Granted Amendments Windows or glazing 7 docs

• 26/00644/FULH Granted

  16 Garden Close Watford Hertfordshire WD17 3DP

  Erection of a two storey side extension with new two storey gables entrance atrium and front two-storey bay. Single storey side extension to left hand side to house the new garage and single storey rear infill extension no more than 6m`s deep from the original wall.

  Received 14 Aug, published by the council 22 Aug 2026 Householder
• 26/00754/FULH Awaiting decision

  498 Whippendell Road Watford WD18 7QJ

  Erection of a ground floor wrap around extension, plus front porch.

  Received 28 Sep, published by the council 7 Oct 2026 Householder
• 26/00759/FULH Awaiting decision

  Gorran Haven Trevellance Way Watford WD25 0LY

  Erection of a double storey side and rear extensions and a single storey front extension.

  Received 28 Sep, published by the council 7 Oct 2026 Householder
• 26/00752/FULH Awaiting decision

  3 East Drive Watford Hertfordshire WD25 0AH

  Erection of single storey side extension and conversion of existing garage into habitable room

  Received 28 Sep, published by the council 1 Oct 2026 Householder
• 26/00756/FULH Awaiting decision

  40 Capel Road Watford WD19 4AE

  Erection of single storey rear extension

  Received 28 Sep, published by the council 1 Oct 2026 Householder