105 Cassiobury Park Avenue Watford WD18 7LH

1. 17 Jul 2026

   Received by Watford

2. 24 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 11 September 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.

• 111 Cassiobury Park Avenue Watford WD18 7LH

  20/00454/FULH Submitted 5 May 2020 50 yards away

  Demolition of existing conservatory and existing garage building and construction of a single storey rear and side extension.

  Granted Householder Extension Demolition 7 docs
  Small domestic

• 111 Cassiobury Park Avenue Watford WD18 7LH

  26/00346/FULH Submitted 5 May 2026 50 yards away

  Erection of single storey rear extension with roof light

  Granted Householder Extension Loft or dormer 10 docs
  Small domestic

• 111 Cassiobury Park Avenue Watford WD18 7LH

  20/00455/LDC Submitted 5 May 2020 50 yards away

  Lawful Development Certificate for a loft conversion with rear dormer, hip-to-gable, velux window and solar panels and installation of obscure glazed window to side elevation.

  Granted Lawful development Loft or dormer Windows or glazing 6 docs

• 94 Cassiobury Park Avenue Watford WD18 7LF

  23/00984/HPD Submitted 27 Oct 2023 50 yards 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

• 94 Cassiobury Park Avenue Watford WD18 7LF

  23/00510/LDC Submitted 12 Jun 2023 50 yards away

  Lawful Development Certificate for single storey rear extension (3m).

  Refused Lawful development Extension 6 docs
  Small domestic

• 119 Cassiobury Park Avenue Watford WD18 7LH

  18/01393/FULH Submitted 31 Oct 2018 50 yards away

  Erection of a single storey rear and side extension.

  Granted Householder Extension 8 docs
  Small domestic

• 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