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Planning application

22/0583/CLPD

64 Williamson Way Mill End Hertfordshire WD3 8GL

Granted Three Rivers Certificate of Lawfulness - Proposed Use

Proposal

Certificate of Lawfulness Proposed Development: Single storey rear extension and loft conversion including Dutch hip to gable extension, rear dormer and front rooflights

As published by the council, reference 22/0583/CLPD

Timeline

Dates from the published record

  1. 29 Mar 2022

    Received by Three Rivers

  2. 23 May 2022

    Decision issued: approved

  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

  • 22/1019/FUL Granted

    36 Williamson Way Mill End Hertfordshire WD3 8GL

    Demolition of existing conservatory and construction of single storey rear extension

    26 May 2022 57m away Full applications
  • 22/1018/FUL Granted

    36 Williamson Way Mill End Hertfordshire WD3 8GL

    Garage conversion into habitable accommodation and alterations to fenestration

    26 May 2022 59m away Full applications
  • 23/2148/FUL Granted

    41 Williamson Way Mill End Rickmansworth Hertfordshire WD3 8GL

    Demolition of existing conservatory and construction of single storey rear extension.

    15 Dec 2023 89m away Full applications
  • 20/1629/FUL Granted

    24 Williamson Way Mill End Rickmansworth Hertfordshire WD3 8GL

    Part two storey, part single storey side extension and enlargement of existing rear conservatory

    10 Aug 2020 96m away Full applications
  • 22/0925/CLPD Granted

    48 Thompson Way Mill End Hertfordshire WD3 8GP

    Certificate of Lawfulness Proposed Development: Loft conversion including side dormer window and installation of new second floor rear facing window and alterations to fenestration detail including installation of new flank windows.

    17 May 2022 166m away Lawful development
  • 22/0434/FUL Granted

    79 Tudor Way Mill End Hertfordshire WD3 8HY

    First floor rear extension

    9 Mar 2022 173m away Full applications

In Three Rivers

  • 26/0842/CLPD Granted

    Dykewood Chorleywood Road Rickmansworth Hertfordshire WD3 4ES

    Certificate of Lawfulness Proposed Development: Installation of solar panels.

    26 May 2026 Lawful development
  • 26/0952/CLPD Granted

    54 Station Road Kings Langley Hertfordshire WD4 8LB

    Certificate of Lawfulness Proposed Development: Loft conversion including hip to gable roof extension; rear dormer, velux windows and construction of outbuilding to rear.

    11 Jun 2026 Lawful development
  • 26/1165/CLPD Awaiting decision

    30 Gable Close Abbots Langley Hertfordshire WD5 0LD

    Certificate of Lawfulness Proposed Development: Loft conversion including rear dormer window and front rooflights

    20 Jul 2026 Lawful development
  • 26/0724/CLED Granted

    70 The Mead Carpenders Park Watford Hertfordshire WD19 5BU

    Certificate of Lawfulness Existing Use: Use of annexe as a separate dwelling

    5 May 2026 Lawful development
  • 25/1151/CLED Refused

    Unit 6 Century Court Tolpits Lane Watford Hertfordshire

    Certificate of Lawfulness Existing Use: Use of property as single dwellinghouse (Use Class C3)

    4 Jul 2025 Lawful development