31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

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

• 5/2026/1324 Refused

  31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

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

  Decided 17 Jul 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• 5/2026/0140 Withdrawn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. 20 Aug 2026

   Received by St Albans

2. 21 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 25 Aug 2026

   Added to PlanIndex

4. 28 Aug 2026

   Decision issued: Certificate of Lawfulness Approved

St Albans granted permission on 28 August 2026, 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.

• 11 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  5/2016/2647 Submitted 23 Aug 2016 50 yards 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 50 yards 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  Withdrawn Extension Loft or dormer +1 11 docs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

• 31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  5/2026/1324 Submitted 8 Jul 2026 50 yards away

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

  Refused Lawful development Extension 9 docs
  Small domestic

• 38 Highfield Avenue Harpenden Hertfordshire Al5 5Ua

  5/2017/3050 Submitted 30 Oct 2017 50 yards 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 150 yards 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 150 yards 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

• 5/2026/1638 Granted

  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

  Received 7 Sep, published by the council 13 Sep 2026 Lawful development
• 5/2026/1622 Granted

  9 Necton Road Wheathampstead Hertfordshire Al4 8At

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

  Received 2 Sep, published by the council 13 Sep 2026 Lawful development
• 5/2026/1561 Granted

  125 New House Park St Albans Hertfordshire Al1 1Uh

  Certificate of Lawfulness (existing) - The retrospective development comprises minor external alterations to the rear elevation of the dwellinghouse at 125 New House Park. The applicant seeks a Certificate of Lawfulness (Existing) under Section 191 of the

  Received 21 Aug, published by the council 31 Aug 2026 Lawful development
• 5/2026/1772 Awaiting decision

  14 Ashley Road St Albans Hertfordshire Al1 5Da

  Certificate of Lawfulness (Proposed) - Loft Conversion, Hip to gable, Rear dormer

  Received 29 Sep, published by the council 11 Oct 2026 Lawful development
• 5/2026/1759 Awaiting decision

  2 Grimston Road St Albans Hertfordshire Al1 5Ep

  Certificate of Lawfulness (Proposed) - Erection of a single-storey detached timber log cabin with a pent (mono-pitch) roof in the rear garden, for purposes incidental to the enjoyment of the dwellinghouse (domestic storage and hobby workshop). Footprint 9

  Received 28 Sep, published by the council 11 Oct 2026 Lawful development