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Planning application

111 Cassiobury Park Avenue Watford WD18 7LH

Granted Watford 26/00346/FULH Full householder

Works: Extension Loft or dormer Small domestic

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

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Erection of single storey rear extension with roof light

As published by the council, reference 26/00346/FULH

Application record

Reference
26/00346/FULH
Type
Full householder
Status
Approved
Decision
Granted As published: Conditional Planning Permission
Received
5 May 2026
Validated
5 May 2026
Decided
26 Jun 2026
Ward
Park
Decision by
Delegated Decision
Postcode
WD18 7LH

Site history

Applications at this address on the Watford register

This site has had 3 applications since 2020: 3 approved, 0 refused.

  • 20/00454/FULH Granted

    111 Cassiobury Park Avenue Watford WD18 7LH

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

    Decided 27 Jun 2020 Householder
  • 20/00455/LDC Granted

    111 Cassiobury Park Avenue Watford WD18 7LH

    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.

    Decided 14 May 2020 Lawful development

Timeline

Dates from the published record

  1. 5 May 2026

    Received by Watford

  2. 26 Jun 2026

    Decision issued: Conditional Planning Permission

  3. 24 Jul 2026

    Added to PlanIndex

Documents

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

10 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 this grant of permission means

Watford granted permission on 26 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.

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

  • 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

    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

  • 105 Cassiobury Park Avenue Watford WD18 7LH

    26/00548/FULH Submitted 17 Jul 2026 50 yards away

    82% 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 16 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

  • 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

In Watford

  • 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