1 Avalon Close Garston Hertfordshire WD25 9TW

1. 3 Feb 2022

   Received by Three Rivers

2. 3 Mar 2022

   Decision issued: approved

3. 19 Aug 2026

   Added to PlanIndex

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.

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

• Westport House 78 Bucknalls Lane Garston Hertfordshire WD25 9JQ

  22/0232/FUL Submitted 14 Feb 2022 36m away

  Single storey side/rear extension

  Granted Full applications Extension 9 docs
  Small domestic

• Westport House 78 Bucknalls Lane Garston WD25 9JQ

  21/2819/CLPD Submitted 13 Dec 2021 50m away

  Certficate of Lawfulness Proposed Development: Single storey side extension

  Withdrawn Lawful development Extension 5 docs
  Small domestic

• 68 Bucknalls Lane Garston Watford Hertfordshire WD25 9JQ

  25/0838/FUL Submitted 14 May 2025 62m away

  Part Retrospective: demolition of existing garage; and construction of single storey side and rear extension, front extension and new roof over existing bay window.

  Granted Full applications Extension Roofing +2 12 docs
  Small domestic

• 13 Avalon Close Garston Watford Hertfordshire WD25 9TW

  25/1635/CLPD Submitted 23 Sep 2025 74m away

  Certificate of Lawfulness Proposed Development: Loft conversion including rear dormer with juliet balconies and window, and front rooflights.

  Granted Lawful development Loft or dormer Windows or glazing 14 docs

• 13 Avalon Close Garston Hertfordshire WD25 9TW

  22/2142/FUL Submitted 17 Nov 2022 77m away

  Demolition of existing front porch and construction of part single, part two-storey rear extension and single storey front extension linking dwelling to garage; garage extension and relocation of entrance door; internal alterations and new window to the side elevation

  Granted Full applications Extension Demolition +1 18 docs
  Small domestic

• 12 Lemonfield Drive Garston WD25 9TR

  20/2163/CLPD Submitted 13 Oct 2020 78m away

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

  Granted Lawful development Loft or dormer 7 docs

• 26/0460/CLED Granted

  Annexe Hart Hall Hyde Lane Nash Mills Hemel Hempstead Hertfordshire HP3 8SA

  Certificate of Lawfulness Existing Use: Use of annexe as an independent dwelling

  19 Mar 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
• 26/0736/CLPD Granted

  45 Watford Road Croxley Green Rickmansworth Hertfordshire WD3 3DS

  Certificate of Lawfulness Proposed Development: Loft conversion including hip to gable roof extension with rear juliet dormer and window, front rooflights, side window

  7 May 2026 Lawful development
• 26/0631/CLPD Granted

  Clovelly Bell Lane Bedmond Abbots Langley Hertfordshire WD5 0QS

  Certificate of Lawfulness Proposed Development: Loft conversion including hip to dutch hip roof extension, rear juliet dormer with windows

  20 Apr 2026 Lawful development