3 How Field Harpenden Hertfordshire Al5 3Au

1. 2 Feb 2026

   Received by St Albans

2. 4 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 22 Apr 2026

   Decision issued: Certificate of Lawfulness Approved

4. 31 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

• 3 How Field Harpenden Hertfordshire Al5 3Au

  5/2026/0458 Submitted 25 Feb 2026 0m away

  Two storey front extensions

  Refused Householder Extension 10 docs
  Domestic

• 3 How Field Harpenden Hertfordshire Al5 3Au

  5/2026/1296 Submitted 6 Jul 2026 0m away

  Two storey front extension, garage conversion and alterations to openings

  Decided Householder Extension 11 docs
  Small domestic

• 47 Roundwood Park Harpenden Hertfordshire Al5 3Ag

  5/2017/1787 Submitted 21 Jun 2017 140m away

  Discharge of Condition 3 (samples of materials) of planning permission 5/2016/3293 dated 30/01/2017 for the Addition of first floor with habitable accommodation in the roof, raising of roof from flat to pitched of existing single storey rear extension, n

  Decided Conditions Extension 3 docs
  Small domestic

• 1 Hanover Grange Harpenden Hertfordshire Al5 3Bd

  TP/2025/0382 Submitted 31 Jul 2025 146m away

  G1 2 Oaks (over road) - Crown clean, crown lift to 5.2m approx & 1 overlong lateral shorten by 4m as this will be an issue with vehicle strike being low T2 3 Stems - Fell (adjacent to the cabin - stumps to remain) G3 Beech Hedge - Reduction down to 3m app

  Decided Trees

• 5 Hanover Grange Harpenden Hertfordshire Al5 3Bd

  TP/2026/0367 Submitted 27 Jul 2026 146m away

  Hornbeam x 5 reduce back to previous points, Oak Repeat crown reduction reducing back to the previous pruning points. Historically approved under Planning Application TP/2016/0331.

  Decided Trees 2 docs

• 36 Roundwood Park Harpenden Hertfordshire Al5 3Af

  5/2017/0881 Submitted 26 Mar 2017 156m away

  Conversion of garage to habitable accommodation with alteration to opening at rear and new opening to side elevation

  Decided Householder 12 docs
  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