56 Langley Grove Sandridge Hertfordshire Al4 9Dx

1. 22 Jan 2026

   Received by St Albans

2. 23 Jan 2026

   Validated

   Checked as complete and ready for consideration.

3. 10 Apr 2026

   Decision issued: Certificate of Lawfulness Approved

4. 7 Sep 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

• 112 Langley Grove Sandridge Hertfordshire Al4 9Dy

  5/2017/2672 Submitted 21 Sep 2017 109m away

  Garden room following removal of existing sheds

  Decided Householder 10 docs
  Small domestic

• St Leonards Crescent Garages St Leonards Crescent Sandridge Hertfordshire

  5/2017/2633 Submitted 18 Sep 2017 109m away

  Variation of Condition 2 (approved plans) to incorporate works to the boundaries of planning permission 5/2015/2098 dated 17/11/2015 for Four, one bedroom and four, two bedroom apartments with associated landscaping, parking and new crossover

  Withdrawn New dwelling 15 docs

• St Leonards Crescent Garages St Leonards Crescent Sandridge Hertfordshire

  5/2017/2545 Submitted 6 Sep 2017 109m away

  Discharge of Conditions 7 (tree protection of existing), 9 (tree protection during implementation), 10 (tree planting), 13 (method statement) to planning permission 5/2015/2098 dated 17/11/2015 for Four, one bedroom and four, two bedroom apartments with a

  Granted Conditions New dwelling 6 docs

• 12 Lyndon Mead Sandridge Hertfordshire Al4 9Ex

  5/2016/2998 Submitted 3 Oct 2016 113m away

  Single storey front extension with partial garage conversion to kitchen and alterations to openings

  Decided Householder Extension 17 docs
  Small domestic

• 27 St Leonards Crescent Sandridge Hertfordshire Al4 9Ej

  5/2016/3009 Submitted 4 Oct 2016 142m away

  Prior Notification - Single storey rear extension 3.4m in height x 4.0m in depth with 2.4m height to eaves

  Granted Prior approval Extension 6 docs
  Small domestic

• Langley Grove Garages Langley Grove Sandridge St Albans Hertfordshire Al4 9Du

  5/2017/2544 Submitted 6 Sep 2017 189m away

  Discharge of Conditions 7 (tree/natural feature protection: fencing), 9 (protection of trees - foundation details and excavation for services), 10 (provision for new tree planting), 13 (method statement for tree protection during demolition and constructi

  Granted Conditions Demolition 9 docs

• 5/2026/1607 Decided

  5 Flavian Close St Albans Hertfordshire Al3 4Jx

  Certificate of Lawfulness (proposed) - Construction of single storey rear extension with tiled lean to roof fitted with 3no. roof lights

  1 Sep 2026 Lawful development
• 5/2026/0951 Refused

  23 Clarence Road St Albans Hertfordshire Al1 4Np

  Certificate of Lawfulness (proposed) - New single storey garden room and close boarded access gates

  15 May 2026 Lawful development
• 5/2026/1558 Granted

  31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  Certificate of Lawfulness ( Proposed) - Proposed rear single-storey extension, side single-storey extension and removal of rear chimney stack

  20 Aug 2026 Lawful development
• 5/2026/0291 Refused

  66 Pondfield Crescent St Albans Hertfordshire Al4 9Pf

  Certificate of Lawfulness (proposed) - Hip to gable and new dormer

  16 Feb 2026 Lawful development
• 5/2026/1252 Refused

  7 Palfrey Close St Albans Hertfordshire Al3 5Re

  Certificate of Lawfulness (proposed) - Single storey/ground floor extension to dining room, to extend as far as kitchen rear/outside wall across to party wall. Repositioning French windows to new rear of room, and repositioning downpipe and soak away in r

  30 Jun 2026 Lawful development