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

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 304 Cassiobury Drive Watford WD17 3AP

  25/00589/FULH Submitted 23 Jun 2025 20m away

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

  Decided Householder 14 docs
  Domestic

• 304 Cassiobury Drive Watford WD17 3AP

  25/00080/FULH Submitted 29 Jan 2025 20m away

  Retrospective application for the construction of a front facing dormer

  Decided Householder Loft or dormer 11 docs
  Domestic

• 304 Cassiobury Drive Watford WD17 3AP

  24/00460/HPD Submitted 14 May 2024 20m 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 20m away

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

  Decided Householder Extension 10 docs
  Small domestic

• 304 Cassiobury Drive Watford WD17 3AP

  24/00656/FULH Submitted 9 Jul 2024 20m away

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

  Decided Householder Extension 9 docs
  Small domestic

• 199 Cassiobury Drive Watford Hertfordshire WD17 3AN

  22/01247/DISCON Submitted 25 Oct 2022 31m 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

  Decided Conditions 7 docs

• 26/00582/FULH Decided

  23 Westlea Avenue Watford WD25 9DH

  Erection of single story side extension and front porch extension

  28 Jul 2026 Householder
• 26/00507/FULH Decided

  96 Sheepcot Lane Watford WD25 0EB

  Erection of single storey rear extension and double storey side and rear extension and fenestration alterations

  2 Jul 2026 Householder
• 26/00506/FULH Decided

  20 Orchard Drive Watford WD17 3DY

  Erection of part two storey rear extension and hip to gable loft conversion including rear domer extension and x 3 front rooflights

  1 Jul 2026 Householder
• 26/00443/FULH Refused

  71 Princes Avenue Watford WD18 7RR

  Erection of single storey side and rear extension

  11 Jun 2026 Householder
• 26/00688/FULH Awaiting decision

  54 Kingsfield Road Watford Hertfordshire WD19 4TR

  Erection of ground floor single storey rear and side return extension, hip to gable loft conversion including rear dormer

  27 Aug 2026 Householder