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Planning application

20/00742/LDC

128 Cassiobury Drive Watford WD17 3AJ

Granted Watford Lawful Development Certificate

Proposal

Lawful development certificate for proposed erection of 4m deep single storey rear extension

As published by the council, reference 20/00742/LDC

Timeline

Dates from the published record

  1. 21 Jul 2020

    Received by Watford

  2. 12 Aug 2020

    Decision issued: Grant Lawful Development Certificate

  3. 24 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

About lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 25/00322/LDC Granted

    24 The Gardens Watford WD17 3DS

    Lawful Development Certificate for proposed removal of the chimney stack and the insertion of a window

    1 Apr 2025 112m away Lawful development
  • 26/00506/FULH Awaiting decision

    20 Orchard Drive Watford WD17 3DY

    Erection of part two storey rear extension and hip to gable loft conversion including rear domer extension and x 3 front rooflights

    1 Jul 2026 112m away Householder
  • 25/00281/FULH Decided

    20 Orchard Drive Watford WD17 3DY

    Erection of single storey rear and side extension and part of first floor extension.

    24 Mar 2025 112m away Householder
  • 20/00779/TPO Granted

    42 The Gardens Watford WD17 3DW

    Works to trees under TPO54 - remove Atlantic Blue Cedar tree

    29 Jul 2020 158m away Trees
  • 20/00778/FULH Decided

    19 The Gardens Watford WD17 3DT

    Erection of part two storey, part single storey rear extension.

    29 Jul 2020 168m away Householder
  • 25/00386/FULH Decided

    85 Woodland Drive Watford WD17 3LA

    (Retrospective) single storey detached outbuilding.

    23 Apr 2025 176m away Householder

In Watford

  • 26/00416/LDC Granted

    249 Hempstead Road Watford WD17 3HH

    Lawful Development Certificate for a loft extension incorporating a rear flat-roof dormer and installation of three rooflights to the front roof slope, Garage conversion and front porch canopy.

    4 Jun 2026 Lawful development
  • 26/00485/LDC Granted

    Shrodells Unit Watford General Hospital Vicarage Road Watford WD18 0HB

    Lawful development certificate for proposed single storey extension to Shrodells Unit

    26 Jun 2026 Lawful development
  • 26/00555/LDC Awaiting decision

    81 Tudor Walk Watford Hertfordshire WD24 7NZ

    Lawful Development Certificate for a hip-to-gable roof enlargement, rear dormer, alterations to the roof of the existing two-storey rear extension and associated rooflights.

    20 Jul 2026 Lawful development
  • 26/00549/LDC Awaiting decision

    4 Field Road Watford WD19 4DR

    Lawful Development Certificate to replace single storey rear extension.

    17 Jul 2026 Lawful development
  • 26/00396/LDC Granted

    14 Swiss Avenue Watford WD18 7LN

    Lawful Development Certificate for proposed loft conversion including rear dormer extension, two rear-facing windows and x3 front rooflights

    27 May 2026 Lawful development