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 55 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 56 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

  80% 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 21 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 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

• 350 Cassiobury Drive Watford WD17 3AW

  24/00070/DISCON Submitted 30 Jan 2024 50 yards away

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

  Granted Conditions 3 docs

• 350 Cassiobury Drive Watford Hertfordshire WD17 3AW

  22/00554/FULH Submitted 27 Apr 2022 50 yards away

  Double storey side and rear extensions with hipped roof detail.

  Refused Householder Extension 15 docs
  Domestic

• 26/00712/FULH Awaiting decision

  32 Gade Avenue Watford Hertfordshire WD18 7LG

  Erection of a single storey rear extension and internal alterations.

  Received 8 Sep, published by the council 14 Sep 2026 Householder
• 26/00491/FULH Granted

  88 High Road Watford WD25 7LJ

  Retrospective planning application for timber framed cantilevered garden barbecue canopy with roof tiles to match existing

  Received 29 Jun, published by the council 24 Jul 2026 Householder
• 26/00559/FULH Granted

  157 Cassiobury Drive Watford WD17 3AL

  Proposed roof alteration involving double hip-to-gable conversion; erection of a rear crown-roof dormer; erection of a front dormer; installation of 4 x roof lights on the front and front/side roof slope; installation of new windows to the front, rear and side; installation of a side door to the ground floor; changes to finish materials; internal alterations.

  Received 21 Jul, published by the council 26 Jul 2026 Householder
• 26/00550/FULH Granted

  39 The Ridgeway Watford WD17 4TH

  Proposed roof alteration and conversion of loft into habitable room with roof lights.

  Received 17 Jul, published by the council 26 Jul 2026 Householder
• 26/00601/FULH Granted

  28 Oakdene Road Watford WD24 6RW

  Erection of first floor rear extension

  Received 3 Aug, published by the council 9 Aug 2026 Householder