27 Trumpington Drive St Albans Hertfordshire Al1 2Jw

1. 8 Jan 2026

   Received by St Albans

2. 27 Jan 2026

   Validated

   Checked as complete and ready for consideration.

3. 7 Sep 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

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

• 18 Trumpington Drive St Albans Hertfordshire Al1 2Jp

  5/2026/0686 Submitted 1 Apr 2026 56m away

  Discharge of Conditions 4 (existing levels and proposed structural slab levels) and 9 (PEA compliance) of planning permission 5/2024/1210 dated 28/11/2025 for Proposed single storey rear extension and new dwelling with rear facing dormer on land to the si

  Granted Conditions New dwelling Extension +1 11 docs
  Small domestic

• 1 Chapel Place Wallingford Walk St Albans Hertfordshire Al1 2Ap

  5/2017/2613 Submitted 17 Sep 2017 84m away

  Replacement conservatory

  Refused Householder Extension 12 docs
  Small domestic

• 16 Pemberton Close St Albans Hertfordshire Al1 2Js

  5/2017/2538 Submitted 6 Sep 2017 114m away

  Single storey front extension with rooflights

  Decided Householder Extension Loft or dormer 8 docs
  Small domestic

• 38 Wallingford Walk St Albans Hertfordshire Al1 2Jj

  5/2021/1045 Submitted 7 Apr 2021 126m away

  Loft conversion with dormer window and rooflights with cedar cladding

  Decided Householder Loft or dormer Windows or glazing 10 docs
  Domestic

• 21 Maynard Drive St Albans Hertfordshire Al1 2Jx

  5/2017/2788 Submitted 3 Oct 2017 218m away

  Replacement single storey front porch following demolition of existing

  Decided Householder Extension Demolition 8 docs
  Small domestic

• St Albans Gasholder Station Graham Close St Albans Hertfordshire Al1 2Qx

  5/2017/2591 Submitted 13 Sep 2017 245m away

  Application to revoke Hazardous Substance consent 5/2002/0124

  Granted Other 10 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