15 Chiltern Road St Albans Hertfordshire Al4 9Sw

1. 21 Aug 2026

   Received by St Albans

2. 24 Aug 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

• 70 Windmill Avenue St Albans Hertfordshire Al4 9Sn

  5/2016/3092 Submitted 12 Oct 2016 48m away

  Partial Discharge of Condition 6 (surface water drainage) of planning permission 5/2016/0247 dated 19/04/2016 for First floor side extension and subdivision of existing three bedroom house into two self-contained dwellings comprising one, three bedroom ho

  Granted Conditions Extension 5 docs

• 68 Windmill Avenue St Albans Hertfordshire Al4 9Sn

  5/2026/0566 Submitted 23 Mar 2026 48m away

  Discharge of Condition 4 (planting details) of planning permission 5/2025/1692 dated 21/11/2025 for Change of use of amenity land to residential garden, single storey rear extension, alterations to front bay window and erection of 1.8m high boundary fence

  Granted Conditions Extension Windows or glazing 9 docs
  Small domestic

• 62 Windmill Avenue St Albans Hertfordshire Al4 9Sn

  5/2017/1784 Submitted 21 Jun 2017 48m away

  First floor rear extension and dormer window and installation of window to first floor side elevation

  Refused Householder Extension Loft or dormer +1 19 docs
  Domestic

• 68 Windmill Avenue St Albans Hertfordshire Al4 9Sn

  5/2025/1692 Submitted 15 Sep 2025 48m away

  Change of use of amenity land to residential garden, single storey rear extension, alterations to front bay window and erection of 1.8m high boundary fence

  Decided Full applications Extension Windows or glazing 15 docs
  Small domestic

• 9 Regent Close St Albans Hertfordshire Al4 9Tr

  5/2026/0194 Submitted 4 Feb 2026 110m away

  Certificate of Lawfulness (proposed) - Proposed Porch 3m sq, proposed 3m rear single storey extension

  Refused Lawful development Extension 12 docs
  Small domestic

• 4 Regent Close St Albans Hertfordshire Al4 9Tr

  5/2026/0852 Submitted 29 Apr 2026 110m away

  Single storey rear extension, partial first floor rear extension and enclosure of front porch

  Decided Householder Extension 10 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