40 Garston Lane Watford WD25 9QL

1. 11 Mar 2026

   Received by Watford

2. 12 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Apr 2026

   Decision issued: Grant Lawful Development Certificate

4. 9 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

• 28 Garston Lane Watford WD25 9QL

  22/00452/FULH Submitted 4 Apr 2022 46m away

  Demolish existing garage and erect single storey rear and side extension including fenestration alterations

  Decided Householder Extension Demolition +1 10 docs
  Small domestic

• 54 Garston Lane Watford Hertfordshire WD25 9QL

  22/00201/LDC Submitted 16 Feb 2022 55m away

  Lawful Development Certificate for an erection of detached outbuilding.

  Granted Lawful development 4 docs

• 56 Garston Lane Watford WD25 9QL

  22/00282/LDC Submitted 3 Mar 2022 61m away

  Lawful development certificate for proposed hip to gable loft conversion including rear dormer and x2 front roof lights

  Granted Lawful development Loft or dormer 9 docs

• 58 Garston Lane Watford WD25 9QL

  24/01019/LDC Submitted 5 Nov 2024 67m away

  Lawful Development Certificate for proposed hip to gable loft conversion including rear dormer with juliette balcony and 2x front rooflights

  Refused Lawful development Loft or dormer 9 docs

• 24 Garston Lane Watford Hertfordshire WD25 9QJ

  22/00612/FUL Submitted 9 May 2022 79m away

  Change of use from hotel to care home

  Decided Full applications 11 docs

• 3 Cuffley Avenue Watford Hertfordshire WD25 9RB

  24/00019/LDC Submitted 12 Jan 2024 93m away

  Lawful developement certificate for proposed erection of single storey rear extension

  Granted Lawful development Extension 22 docs
  Small domestic

• 26/00494/LDC Refused

  204A St Albans Road Watford WD24 4AS

  Lawful development certificate for existing use of the first and second floors as two separate self-contained residential dwellings (Use Class C3), each comprising independent living accommodation, kitchen facilities, bathroom facilities and ancillary storage, with access provided via the existing external rear staircase

  29 Jun 2026 Lawful development
• 26/00531/LDC Granted

  1014 St Albans Road Watford WD25 9NP

  Lawful development certificate for proposed hip to gable roof extension and loft conversion

  10 Jul 2026 Lawful development
• 26/00549/LDC Granted

  4 Field Road Watford WD19 4DR

  Lawful Development Certificate to replace single storey rear extension.

  17 Jul 2026 Lawful development
• 26/00659/LDC Awaiting decision

  38 Talbot Avenue Watford WD19 4AX

  Lawful development certificate for proposed demolition of existing rear extension and erection of single storey rear extension

  20 Aug 2026 Lawful development
• 26/00475/LDC Refused

  268 Hempstead Road Watford WD17 4LY

  Lawful development certificate for proposed hip to gable loft conversion to extend main ridge line and rear dormer

  23 Jun 2026 Lawful development