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Planning application

20/1844/CLPD

111 Greenfield Avenue Carpenders Park WD19 5DG

Granted Three Rivers Certificate of Lawfulness - Proposed Use

Proposal

Certificate of Lawfulness Proposed Development: Erection of a single storey rear extension

As published by the council, reference 20/1844/CLPD

Timeline

Dates from the published record

  1. 6 Sep 2020

    Received by Three Rivers

  2. 15 Sep 2020

    Validated

    Checked as complete and ready for consideration.

  3. 6 Nov 2020

    Decision issued: approved

  4. 30 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

  • 25/1311/FUL Granted

    126 Greenfield Avenue Carpenders Park Watford Hertfordshire WD19 5DQ

    Construction of single storey rear extension

    4 Aug 2025 74m away Full applications
  • 26/0930/PDE Awaiting decision

    116 Penrose Avenue Carpenders Park Watford Hertfordshire WD19 5AA

    Prior Approval: Single storey rear extension (depth 6.00 metres, maximum height 2.81 metres, maximum eaves height 2.81 metres)

    8 Jun 2026 145m away Outline
  • 22/0455/RSP Refused

    108 Penrose Avenue Carpenders Park Hertfordshire WD19 5AA

    Part Retrospective: Construction of raised decking to rear including raising of existing rear extension roof with alterations to rear fenestration, alterations to boundary treatment and erection of privacy screen

    11 Mar 2022 160m away Amendments
  • 23/2057/FUL Withdrawn

    4A Alva Way Carpenders Park Watford Hertfordshire WD19 5ED

    Extension of existing dropped kerb and extension of hardstanding to existing driveway

    1 Dec 2023 174m away Full applications
  • 23/2058/CLPD Granted

    4A Alva Way Carpenders Park Watford Hertfordshire WD19 5ED

    Certificate of Lawfulness Proposed Development: Conversion of garage into habitable accommodation.

    1 Dec 2023 174m away Lawful development
  • 25/1116/FUL Refused

    100 Penrose Avenue Carpenders Park Watford Hertfordshire WD19 5AA

    Construction of single storey rear extension, with alterations to rear patio including glass balustrading and steps; installation of 3 no. windows to side elevation

    30 Jun 2025 175m 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