31 Rosemary Drive London Colney Hertfordshire Al2 1Ud

1. 16 Mar 2026

   Received by St Albans

2. 23 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Jun 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

• 30 Rosemary Drive London Colney Hertfordshire Al2 1Ud

  5/2026/0555 Submitted 20 Mar 2026 0m away

  Single storey rear extension with roof windows, alterations to openings, part garage conversion with new garage door.

  Decided Householder Extension Windows or glazing 15 docs
  Small domestic

• 12 Tamarix Crescent London Colney Hertfordshire Al2 1Ut

  TP/2026/0425 Submitted 28 Aug 2026 135m away

  G1 Treeline behind the rear garden of 12 Tamarix Crescent, to carry out a prune of the roots to the fence line that are currently lifting the paving slabs in the garden of number 12. Then to install a barrier to prevent the growth from causing the same is

  Decided Trees 3 docs
  Small domestic

• 12 Tamarix Crescent London Colney Hertfordshire Al2 1Ut

  TP/2026/0391 Submitted 11 Aug 2026 135m away

  T154 Ash - Cut back off Boundary Fence line to give a 1m clearance

  Decided Trees 2 docs
  Small domestic

• 31 Farm Crescent London Colney Hertfordshire Al2 1Ug

  TP/2026/0175 Submitted 10 Apr 2026 178m away

  T1 Goat Willow - Fell, encroaching over boundary fence line and damaging fence G2 Hawthorn - Hawthorn hedge to be faced back off boundary fence line to prevent damage to fence.

  Granted Trees 3 docs
  Small domestic

• 22 Farm Crescent London Colney Al2 1Uq

  TP/2017/0464 Submitted 9 Sep 2017 244m away

  Reduce crowns of 2 Cherry trees by 1m & thin by 10%. Cut back Laurel hedge to align with pavement. Reason - To allow light to garden.

  Granted Trees 3 docs

• 4 Strawberry Crescent London Colney Hertfordshire Al2 1Us

  5/2021/0312 Submitted 3 Feb 2021 279m away

  Rear outbuilding (retrospective)

  Refused Householder 14 docs
  Small domestic

• 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