16 Queen Marys Avenue Watford WD18 7JP

1. 7 Dec 2021

   Received by Watford

2. 9 Dec 2021

   Validated

   Checked as complete and ready for consideration.

3. 28 Jan 2022

   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

• 26 Queen Marys Avenue Watford WD18 7JP

  20/00533/FULH Submitted 28 May 2020 36m away

  Erection of single storey rear conservatory extension

  Refused Householder Extension 8 docs
  Small domestic

• 26 Queen Marys Avenue Watford WD18 7JP

  20/00200/HPD Submitted 20 Feb 2020 36m away

  The erection of a single storey rear extension which would extend beyond the rear wall of the original house by 3.5m for which the maximum height would be 3.7m and for which the height of the eaves would be 2.7m

  Granted Prior approval Extension 4 docs
  Small domestic

• 43 Royal Court Queen Marys Avenue Watford Hertfordshire WD18 7JN

  23/00207/LDC Submitted 10 Mar 2023 66m away

  Lawful development certificate for proposed loft conversion including x2 front and x2 rear rooflights

  Granted Lawful development Loft or dormer 4 docs

• 69 The Chase Watford WD18 7JQ

  24/00599/LDC Submitted 21 Jun 2024 68m away

  Lawful Development Certificate for construction of garden room to rear garden.

  Granted Lawful development 6 docs

• Van Monster 176 Rickmansworth Road Watford WD18 7JS

  26/00616/FUL Submitted 10 Aug 2026 70m away

  0% historically approved · decision due ~8 Oct

  Change of use from an existing Sui Generis motor vehicle sales use to a mixed Sui Generis motor trade use including vehicle sales, servicing, repairs, tyre fitting, vehicle washing and valeting, together with the enclosure of the existing forecourt canopy to provide additional internal floorspace.

  Awaiting decision Full applications 28 docs

• 43 Royal Court Queen Marys Avenue Watford Hertfordshire WD18 7JN

  22/00381/FULH Submitted 22 Mar 2022 72m away

  Conversion of loft space to form habitable room, incorporating rear and front dormer window and x 1 front roof light

  Refused Householder Loft or dormer Windows or glazing 5 docs
  Domestic

• 26/00700/LDC Awaiting decision

  13 Orchard Close Watford WD17 3DU

  Lawful Development Certificate for a hip to gable loft conversion with three skylights on the front slope.

  3 Sep 2026 Lawful development
• 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