40 Dickinson Avenue Croxley Green Rickmansworth Hertfordshire WD3 3EX

1. 29 Aug 2023

   Received by Three Rivers

2. 1 Sep 2023

   Validated

   Checked as complete and ready for consideration.

3. 20 Oct 2023

   Decision issued: approved

4. 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

• 34 Dickinson Avenue Croxley Green WD3 3EX

  21/0578/FUL Submitted 8 Mar 2021 24m away

  Single storey rear extension

  Granted Full applications Extension 10 docs
  Small domestic

• 43 Dickinson Avenue Croxley Green WD3 3EU

  21/0397/FUL Submitted 19 Feb 2021 50m away

  Loft conversion including hip-to-gable extension, construction of rear dormer and insertion of front rooflights

  Granted Full applications Extension Loft or dormer 9 docs

• 39 Watford Road Croxley Green Rickmansworth Hertfordshire WD3 3DP

  23/0889/FUL Submitted 31 May 2023 53m away

  Change of use of existing playroom and garages into habitable accommodation to provide two-bedroom dwelling and associated works to provide amenity space and refuse storage

  Withdrawn Full applications 23 docs
  Domestic

• 51 Dickinson Avenue Croxley Green Rickmansworth Hertfordshire WD3 3EU

  25/1323/FUL Submitted 5 Aug 2025 59m away

  Construction of single storey side and rear extension, addition of windows to side elevation

  Granted Full applications Extension Windows or glazing 11 docs
  Small domestic

• 39 Watford Road Croxley Green Rickmansworth Hertfordshire WD3 3DP

  24/0215/FUL Submitted 9 Feb 2024 65m away

  Change of use of existing playroom and garages into habitable accommodation to provide two-bedroom dwelling and associated works to provide amenity space, refuse storage and parking.

  Granted Full applications 26 docs
  Domestic

• 41 Dickinson Square Croxley Green Rickmansworth Hertfordshire WD3 3EY

  21/0818/TCA Submitted 25 Mar 2021 73m away

  Silver Birch - end of rear garden - top crown reduction of 4 metres and a reduction of lower lateral branches by up to 1 metre (to retain a good shape)

  Granted Trees 5 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