31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

This site has had 3 applications since 2026: 1 approved, 1 refused.

• 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

  Decided 28 Aug 2026 Lawful development
• 5/2026/0140 Withdrawn

  31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  Proposed single-storey rear extension with rooflights, two-storey side extension and new rear roof dormer along with rooflights to the front. New front porch and internal alterations following demolition to the existing detached garage

  Decided 12 Jun 2026

1. 8 Jul 2026

   Received by St Albans

2. 9 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 17 Jul 2026

   Decision issued: Certificate of Lawfulness Refused

4. 24 Jul 2026

   Added to PlanIndex

St Albans refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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.

• 31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  5/2026/1558 Submitted 20 Aug 2026 0m away

  Certificate of Lawfulness ( Proposed) - Proposed rear single-storey extension, side single-storey extension and removal of rear chimney stack

  Granted Lawful development Extension 8 docs
  Small domestic

• 11 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  5/2016/2647 Submitted 23 Aug 2016 0m away

  Raising of and alterations to roof from hip to half hip roof form to create habitable loft accommodation with two rear dormer windows and rooflights and removal of one existing chimney

  Refused Householder Loft or dormer Windows or glazing 13 docs
  Domestic

• 31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  5/2026/0140 Submitted 27 Jan 2026 0m away

  Proposed single-storey rear extension with rooflights, two-storey side extension and new rear roof dormer along with rooflights to the front. New front porch and internal alterations following demolition to the existing detached garage

  Withdrawn Extension Loft or dormer +1 11 docs
  Small domestic

• 38 Highfield Avenue Harpenden Hertfordshire Al5 5Ua

  5/2017/3050 Submitted 30 Oct 2017 56m away

  Two storey rear and side extension, single storey rear extension, new front porch, hip to gable roof extension, loft conversion with rear dormer window, partial garage conversion, alterations to openings and installation of rooflights

  Granted Householder Extension Loft or dormer +1 10 docs
  Small domestic

• 81 Topstreet Way Harpenden Hertfordshire Al5 5Ty

  5/2017/2594 Submitted 17 Sep 2017 132m away

  Hip to half-hipped roof extensions, loft conversion with rear dormer window and insertion of openings

  Granted Householder Extension Loft or dormer +1 11 docs
  Domestic

• 75 Topstreet Way Harpenden Hertfordshire Al5 5Ty

  5/2017/2834 Submitted 8 Oct 2017 132m away

  Single storey front, two storey side extension, alterations to openings and loft conversion with roof alterations, rear dormer window and front rooflights

  Granted Householder Extension Loft or dormer +2 10 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