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 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.

• 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

• 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

• 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

• 88 Cassiobury Park Avenue Watford Hertfordshire WD18 7LF

  22/00456/LDC Submitted 5 Apr 2022 50 yards away

  Lawful development certificate of proposed erection of single storey side extension on existing detached garage

  Granted Lawful development Extension 6 docs
  Small domestic

• 88 Cassiobury Park Avenue Watford WD18 7LF

  22/00062/FULH Submitted 18 Jan 2022 50 yards away

  Proposed reduction in the depth of the existing extension in order to comply with the established building line along the street with roof lights.

  Granted Householder Extension Loft or dormer 6 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