23 Coldharbour Lane Harpenden Hertfordshire Al5 4Nq

1. 17 May 2021

   Received by St Albans

2. 18 May 2021

   Validated

   Checked as complete and ready for consideration.

3. 15 Jul 2021

   Decision issued: Certificate of Lawfulness Approved

4. 10 Sep 2026

   Added to PlanIndex

St Albans granted permission on 15 July 2021, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 59 Coldharbour Lane Harpenden Hertfordshire Al5 4Nf

  5/2021/1498 Submitted 17 May 2021 166m away

  Extension and conversion of garage to create two bedroom bungalow and associated parking

  Withdrawn Extension 8 docs

• 12 Willoughby Road Harpenden Hertfordshire Al5 4Pf

  5/2016/3091 Submitted 12 Oct 2016 173m away

  Certificate of Lawfulness (proposed) - Single storey rear and side extension (prior approval given 5/2016/2391 dated 29/09/2016), insertion of skylight and french doors to existing extension

  Refused Lawful development Extension Windows or glazing 9 docs
  Small domestic

• 34 St James Road Harpenden Hertfordshire Al5 4Pb

  5/2026/0248 Submitted 10 Feb 2026 179m away

  First floor rear roof extension to create bedroom

  Refused Householder Extension 14 docs
  Domestic

• 16 St Martins Close Harpenden Hertfordshire Al5 5Jg

  5/2021/0934 Submitted 29 Mar 2021 195m away

  Single storey front extension and alterations to existing single storey front roof

  Granted Householder Extension 10 docs
  Small domestic

• 48 Coldharbour Lane Harpenden Hertfordshire Al5 4Un

  5/2021/0684 Submitted 9 Mar 2021 200m away

  Discharge of Condition 21 (levels) of planning permission 5/2020/0985 dated 18/11/2020 for Construction of Class B1(c) (light industrial) and Class B8 (storage and distribution) warehouse building and vehicle repair and servicing building with associated

  Granted Conditions 5 docs

• 17 Willow Way Harpenden Hertfordshire Al5 5Jf

  5/2016/1930 Submitted 20 Jun 2016 224m away

  Single storey front extension incorporating new porch and single storey rear extensions with rooflights

  Granted Householder Extension Loft or dormer 6 docs
  Small domestic

• 5/2026/1277 Granted

  52 Napsbury Avenue London Colney Hertfordshire Al2 1Ls

  Certificate of Lawfulness (proposed) - The proposed development comprises building operations associated with the loft conversion of the existing roof space to provide additional habitable accommodation. The works include the construction of a rear dormer

  1 Jul 2026 Lawful development
• 5/2026/1366 Granted

  256 Sandridge Road St Albans Hertfordshire Al1 4Aj

  Certificate of Lawfulness (proposed) - Loft conversion with rear dormer & 4 velux to front

  14 Jul 2026 Lawful development
• 5/2026/1638 Decided

  1 Castle Rise Wheathampstead Hertfordshire Al4 8Hx

  Certificate of Lawfulness (proposed) - Proposed loft hip to gable with rear dormer, internal alterations and all associated works at 1 Castle Rise, AL4 8HX

  7 Sep 2026 Lawful development
• 5/2026/1621 Decided

  9 Ashley Gardens Harpenden Hertfordshire Al5 3En

  Certificate of Lawfulness (proposed) - Erection of a fence within boundary of the property

  2 Sep 2026 Lawful development
• 5/2026/1622 Decided

  9 Necton Road Wheathampstead Hertfordshire Al4 8At

  Certificate of Lawfulness (proposed) - Dormer to rear elevation to existing bedroom. new window to rear

  2 Sep 2026 Lawful development