111 Cassiobury Park Avenue Watford WD18 7LH

1. 5 May 2020

   Received by Watford

2. 27 Jun 2020

   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

• 111 Cassiobury Park Avenue Watford WD18 7LH

  26/00346/FULH Submitted 5 May 2026 0m away

  Erection of single storey rear extension with roof light

  Decided Householder Extension Loft or dormer 10 docs
  Small domestic

• 105 Cassiobury Park Avenue Watford WD18 7LH

  26/00548/FULH Submitted 17 Jul 2026 28m away

  0% historically approved · decision due ~11 Sep

  Conversion of the existing garage to habitable use. Erection of a single storey side extension with a new hipped roof to the single storey side of the dwelling covering both the converted garage and the extension.

  Awaiting decision Householder Extension 14 docs
  Small domestic

• 119 Cassiobury Park Avenue Watford WD18 7LH

  18/01393/FULH Submitted 31 Oct 2018 35m away

  Erection of a single storey rear and side extension.

  Decided Householder Extension 8 docs
  Small domestic

• 94 Cassiobury Park Avenue Watford WD18 7LF

  23/00984/HPD Submitted 27 Oct 2023 65m away

  The erection of a single storey rear extension which would extend beyond the rear wall of the original house by 5.0m for which the maximum height would be 4.0m and for which the height of the eaves would be 2.40m

  Granted Prior approval Extension 6 docs
  Small domestic

• 114 Cassiobury Park Avenue Watford WD18 7LF

  26/00318/FULH Submitted 23 Apr 2026 75m away

  Erection of front porch and single storey side to rear extension, part first floor rear extension (prior approval not required for ground floor extension which is under construction)

  Decided Householder Extension 11 docs
  Small domestic

• 114 Cassiobury Park Avenue Watford WD18 7LF

  26/00278/FULH Submitted 1 Apr 2026 75m away

  Erection of front porch and single storey side to rear extension

  Decided Householder Extension 12 docs
  Small domestic

• 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