37 Church Lane Mill End Rickmansworth Hertfordshire WD3 8PT

1. 21 Apr 2026

   Received by Three Rivers

2. 12 Jun 2026

   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

• 40 Church Lane Mill End Hertfordshire WD3 8HD

  22/0501/FUL Submitted 17 Mar 2022 39m away

  Single storey side and rear extension, increase in height and replacement of existing rear projection roof and alterations to fenestration.

  Granted Full applications Extension Windows or glazing 25 docs
  Small domestic

• 20 Church Lane Mill End WD3 8HD

  21/0423/CLPD Submitted 23 Feb 2021 67m away

  Certificate of Lawfulness Proposed Development: Construction of detached outbuilding

  Granted Lawful development 10 docs

• 10A St Peters Close Mill End WD3 8UY

  21/1146/NMA Submitted 4 May 2021 76m away

  Non-material Amendment to planning permission 17/1827/FUL: Alterations to outbuilding fenestration to white uPVC including replacement window with double door to east elevation and change of roof material from zinc to concrete tiles including from zinc to brick on the west elevation

  Withdrawn Amendments Windows or glazing 6 docs

• 63 Church Lane Mill End WD3 8PT

  21/0278/FUL Submitted 9 Feb 2021 77m away

  Single storey rear extension and single storey rear/side return extension

  Granted Full applications Extension 9 docs
  Small domestic

• 63 Church Lane Mill End WD3 8PT

  21/0279/CLPD Submitted 9 Feb 2021 77m away

  Certificate of Lawfulness Proposed Development: Loft conversion including erection of L-shaped rear dormer and front rooflights

  Refused Lawful development Loft or dormer 8 docs

• 63 Clarkfield Mill End Rickmansworth Hertfordshire WD3 8FL

  26/0619/FUL Submitted 17 Apr 2026 80m away

  Alterations to roof including increase in eaves height to front, installation of rooflights and alterations to fenestration detail including installation of first floor front windows.

  Granted Full applications Loft or dormer Windows or glazing 18 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