164 High Street London Colney Hertfordshire Al2 1Qf

1. 13 Oct 2025

   Received by St Albans

2. 10 Nov 2025

   Validated

   Checked as complete and ready for consideration.

3. 3 Feb 2026

   Decision issued: Certificate of Lawfulness Refused

4. 21 Aug 2026

   Added to PlanIndex

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

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

• 164 High Street London Colney Hertfordshire Al2 1Qf

  5/2026/0878 Submitted 5 May 2026 0m away

  Proposed installation of canopy ventilation, ducting, and associated wall penetration

  Decided 19 docs

• 179A & 179-187 High Street London Colney Hertfordshire Al2 1Rp

  5/2016/2974 Submitted 3 Oct 2016 47m away

  Replacement doors and windows

  Decided Windows or glazing 11 docs

• 141 High Street London Colney Hertfordshire Al2 1Rj

  5/2016/2644 Submitted 23 Aug 2016 123m away

  Loft conversion with L shaped rear dormer window and balcony to rear

  Withdrawn Loft or dormer Windows or glazing 10 docs

• 141 High Street London Colney Hertfordshire Al2 1Rj

  5/2016/2990 Submitted 2 Oct 2016 123m away

  Loft conversion with rear dormer window and front rooflights and alterations to openings (resubmission following withdrawal of 5/2016/2644)

  Decided Householder Loft or dormer Windows or glazing 9 docs
  Domestic

• 206 High Street London Colney Hertfordshire Al2 1Jq

  5/2017/2656 Submitted 24 Sep 2017 160m away

  Prior Notification - Single storey rear extension 6m depth x 3m height x 3m in height to the eaves

  Granted Prior approval Extension 7 docs
  Small domestic

• 43 White Horse Lane London Colney Hertfordshire Al2 1Jp

  5/2026/1290 Submitted 3 Jul 2026 177m away

  Loft conversion with dormer windows.

  Decided Householder Loft or dormer Windows or glazing 9 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