157 Cassiobury Drive Watford WD17 3AL

This site has had 4 applications since 2023: 2 approved, 2 refused.

• 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.

  Decided 8 Sep 2026 Householder
• 26/00192/FULH Refused

  157 Cassiobury Drive Watford WD17 3AL

  Proposed roof alteration involving double hip-to-gable conversion; erection of a rear, crown-roof dormer with french doors and juliet balcony; installation of 6 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.

  Decided 30 Apr 2026 Householder
• 23/01028/LDC Refused

  157 Cassiobury Drive Watford WD17 3AL

  Lawful Development Certificate For Roof alteration involving double hip to gable barn-end conversion; erection of a rear dormer with French Doors with Juliet Balcony; installation of front and side facing roof lights and new casement windows to thee front and rear

  Decided 22 Dec 2023 Lawful development

1. 12 May 2026

   Received by Watford

2. 17 Jun 2026

   Decision issued: Conditional Planning Permission

3. 9 Aug 2026

   Added to PlanIndex

Watford granted permission on 17 June 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.

• 157 Cassiobury Drive Watford WD17 3AL

  26/00559/FULH Submitted 21 Jul 2026 50 yards away

  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.

  Granted Householder Loft or dormer Windows or glazing 17 docs
  Domestic

• 157 Cassiobury Drive Watford WD17 3AL

  26/00192/FULH Submitted 9 Mar 2026 50 yards away

  Proposed roof alteration involving double hip-to-gable conversion; erection of a rear, crown-roof dormer with french doors and juliet balcony; installation of 6 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.

  Refused Householder Loft or dormer Windows or glazing 19 docs
  Domestic

• 157 Cassiobury Drive Watford WD17 3AL

  23/01028/LDC Submitted 10 Nov 2023 50 yards away

  Lawful Development Certificate For Roof alteration involving double hip to gable barn-end conversion; erection of a rear dormer with French Doors with Juliet Balcony; installation of front and side facing roof lights and new casement windows to thee front and rear

  Refused Lawful development Loft or dormer Windows or glazing 19 docs

• 74 Langley Way Watford WD17 3FB

  26/00155/FULH Submitted 26 Feb 2026 100 yards away

  Erection of 2 storey side extension and a porch with changes to fenstration on first floor facing Langley Road

  Refused Householder Extension 14 docs
  Small domestic

• 69 Langley Way Watford Hertfordshire WD17 3EB

  22/01253/FULH Submitted 26 Oct 2022 100 yards away

  Changes to the proposed extensions approved under planning permission ref: 22/00723/FULH. Erection of rear balcony, addition of rooflight above single storey rear extension, replacement of window in side extension front elevation for a door, addition of door to side elevation, repositioning of front entrance door, reduction in number of rooflights.

  Granted Householder Extension Loft or dormer +1 6 docs
  Small domestic

• 69 Langley Way Watford Hertfordshire WD17 3EB

  22/00723/FULH Submitted 31 May 2022 100 yards away

  Erection of part single storey, part two storey rear extension, two storey side extension and loft conversion including front and rear rooflights; renewal of previously approved application ref: 18/01493/FULH.

  Granted Householder Extension Loft or dormer 5 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