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Planning application

346 And 348 Cassiobury Drive Watford WD17 3AW

Awaiting decision Watford 26/00690/FULH Full householder

Works: Extension Loft or dormer Windows or glazing Small domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Erection of single storey and first floor rear extensions to the existing dwelling, alterations to the existing roof and associated internal and external alterations, with retention of the existing garage at No 346 and Erection of single storey and first floor rear extensions to the existing dwelling, conversion of the roof space to provide additional habitable accommodation, installation of front and rear dormer windows and rooflights, alterations to the existing roof and associated internal and external alterations at No.348

As published by the council, reference 26/00690/FULH

Application record

Reference
26/00690/FULH
Type
Full householder
Status
Pending consideration
Received
28 Aug 2026
Validated
9 Sep 2026
Ward
Park
Decision by
Delegated
Postcode
WD17 3AW

Timeline

Dates from the published record

  1. 28 Aug 2026

    Received by Watford

  2. 9 Sep 2026

    Validated

    Checked as complete and ready for consideration.

  3. 14 Sep 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 4 November 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.

Documents

Plans, drawings, consultee responses and the officer's report

22 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

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.

About householder applications

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.

Nearby applications

Within 0.3 miles

  • 350 Cassiobury Drive Watford WD17 3AW

    26/00324/FULH Submitted 27 Apr 2026 50 yards away

    82% historically approved · decision due ~31 Jul

    (Retrospective) Erection of single storey rear outbuilding with hipped roof, brick walls and clay plain tile roof. and WC.

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  • 348 Cassiobury Drive Watford WD17 3AW

    25/00155/FULH Submitted 24 Feb 2025 50 yards away

    Erection of a first floor rear extension with pitched roof linked to existing habitable loft space

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  • 350 Cassiobury Drive Watford Hertfordshire WD17 3AW

    22/00940/FULH Submitted 28 Jul 2022 50 yards away

    Proposed double storey side and rear extensions with associated roof works. Single storey rear extension.

    Granted Householder Extension 7 docs
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  • 350 Cassiobury Drive Watford Hertfordshire WD17 3AW

    22/00935/FULH Submitted 27 Jul 2022 50 yards away

    Erection of double storey side and rear extensions with hipped roof detail.

    Granted Householder Extension 15 docs
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  • 350 Cassiobury Drive Watford WD17 3AW

    25/00222/NONMAT Submitted 10 Mar 2025 50 yards away

    Non material amendment for proposed raising for roof line by 225mm and including brick courses above the windows pursuant to planning permission 23/01007/FUL.

    Granted Amendments Windows or glazing 12 docs

  • 350 Cassiobury Drive Watford WD17 3AW

    24/00174/NONMAT Submitted 28 Feb 2024 50 yards away

    Non material amendment pursuant to planning permission 23/01007/FUL - changes to fenestration window sizes and positions.

    Granted Amendments Windows or glazing 7 docs

In Watford

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    Received 14 Aug, published by the council 22 Aug 2026 Householder
  • 26/00754/FULH Awaiting decision

    498 Whippendell Road Watford WD18 7QJ

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    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