306 Cassiobury Drive Watford WD17 3AW

1. 25 Feb 2026

   Received by Watford

2. 21 Apr 2026

   Decision issued: Conditional Planning Permission

3. 9 Aug 2026

   Added to PlanIndex

Watford granted permission on 21 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 304 Cassiobury Drive Watford WD17 3AP

  25/00589/FULH Submitted 23 Jun 2025 50 yards away

  Retrospective application for existing x2 rear outbuildings and proposed side boundary treatment

  Granted Householder 14 docs
  Domestic

• 304 Cassiobury Drive Watford WD17 3AP

  25/00080/FULH Submitted 29 Jan 2025 50 yards away

  Retrospective application for the construction of a front facing dormer

  Granted Householder Loft or dormer 11 docs
  Domestic

• 304 Cassiobury Drive Watford WD17 3AP

  24/00460/HPD Submitted 14 May 2024 50 yards away

  The erection of a single storey rear extension which would extend beyond the rear wall of the original house by 6.00m for which the maximum height would be 3.00m and for which the height of the eaves would be 2.85m

  Granted Prior approval Extension 9 docs
  Small domestic

• 304 Cassiobury Drive Watford WD17 3AP

  24/00655/FULH Submitted 9 Jul 2024 50 yards away

  Erection of a part single and part double storey rear extension, garage conversion and alterations to existing porch.

  Granted Householder Extension 10 docs
  Small domestic

• 304 Cassiobury Drive Watford WD17 3AP

  24/00656/FULH Submitted 9 Jul 2024 50 yards away

  Erection of part single and part double storey rear extension, garage conversion and alterations to existing porch

  Granted Householder Extension 9 docs
  Small domestic

• 199 Cassiobury Drive Watford Hertfordshire WD17 3AN

  22/01247/DISCON Submitted 25 Oct 2022 50 yards away

  Details submitted for Condition 4 (detailed landscaping plan), Condition 5 (parking and turning) and Condition 6 (refuse, recycling and cycle storage) pursuant to planning permission 20/01501/FUL

  Granted Conditions 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