99 Blacketts Wood Drive Chorleywood Rickmansworth Hertfordshire WD3 5PS

1. 1 Apr 2026

   Received by Three Rivers

2. 7 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 6 May 2026

   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

• Hedgerow On Land Fronting Burtons Lane Farm Road Chorleywood Buckinghamshire

  PL/25/4774/HR Submitted 20 Oct 2025 79m away

  Removal of 15m metre section of hedge

  Granted Trees 3 docs

• Rawdon 29 Chalfont Lane Chorleywood Rickmansworth Hertfordshire WD3 5PR

  24/0280/FUL Submitted 22 Feb 2024 80m away

  Partial demolition of single storey rear extension and construction of part single, part two storey rear extension and two storey front extension; loft extension including rear dormers with windows and side rooflights; relocation of entrance door, internal alterations and alterations to fenestration.

  Granted Full applications Extension Loft or dormer +2 11 docs
  Small domestic

• Rawdon 29 Chalfont Lane Chorleywood Rickmansworth Hertfordshire WD3 5PR

  23/1705/TPO Submitted 7 Oct 2023 82m away

  Beech - 1.5m crown reduction height and width to allow light into the garden and maintain the tree. Ash - fell - ash dieback

  Granted Trees 4 docs

• Willow Cottage Chalfont Lane Chorleywood Rickmansworth Hertfordshire WD3 5PP

  23/1790/DIS Submitted 23 Oct 2023 113m away

  Discharge of Conditions 3 (Materials), 5 (Arboricultural method statement), 6 (Replacement planting), 8 (Energy Statement), 10 (Ecology), 11 (External Lighting), 12 (Landscaping and Ecological Management Plan) and 13 (Construction Management Plan) pursuant to 22/1246/FUL

  Decided Conditions 14 docs

• Willow Cottage Chalfont Lane Chorleywood Hertfordshire WD3 5PP

  22/1246/FUL Submitted 30 Jun 2022 114m away

  Demolition of existing dwelling and erection of two storey detached dwelling with basement, erection of detached garage, and alterations to landscaping.

  Granted Full applications New dwelling Demolition 38 docs
  Domestic

• Willow House Chalfont Lane Chorleywood Rickmansworth Hertfordshire WD3 5PP

  25/0840/DIS Submitted 14 May 2025 114m away

  Discharge of Condition 8 (Energy Statement) and Condition 11 (Lighting) pursuant to 22/1246/FUL

  Decided Conditions 8 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