26 Cowper Road Harpenden Hertfordshire Al5 5Ng

1. 3 Aug 2026

   Received by St Albans

2. 4 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 31 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 29 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   St Albans took a median of 76 days over the applications it decided in the last year.

This application is with St Albans for determination, against a statutory target of eight weeks. Over the last year St Albans decided householder applications in a median of 110 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 22 Cowper Road Harpenden Hertfordshire Al5 5Ng

  5/2016/3616 Submitted 5 Dec 2016 50 yards away

  Rear infill extension

  Granted Householder Extension 22 docs
  Domestic

• 42 Cowper Road Harpenden Hertfordshire Al5 5Ng

  TP/2026/0124 Submitted 14 Mar 2026 50 yards away

  T1 - Norway Maple: Reduce back to previous pruning points.

  Granted Trees 3 docs

• 20 Cowper Road Harpenden Hertfordshire Al5 5Ng

  5/2016/3564 Submitted 30 Nov 2016 50 yards away

  Single storey side and rear extension, garage conversion to habitable room and alterations to openings

  Granted Householder Extension 15 docs
  Small domestic

• 10 Cowper Road Harpenden Hertfordshire Al5 5Ng

  5/2021/1619 Submitted 31 May 2021 50 yards away

  Single storey side extension. Installation of rear rooflights and alterations to openings, windows and roof

  Granted Householder Extension Loft or dormer +1 8 docs
  Small domestic

• 21 Cowper Road Harpenden Hertfordshire Al5 5Nf

  5/2017/1754 Submitted 19 Jun 2017 50 yards away

  Part single, part two storey rear extension, replacement rear dormer window and alterations to openings

  Granted Householder Extension Loft or dormer +1 16 docs
  Domestic

• 31 Cowper Road Harpenden Hertfordshire Al5 5Nf

  5/2017/3061 Submitted 26 Oct 2017 50 yards away

  Single storey rear and first floor rear extension replacement ground floor and balcony roof

  Granted Householder Extension 9 docs
  Small domestic

• 5/2026/0517 Granted

  28 White Hedge Drive St Albans Hertfordshire Al3 5Tt

  Proposed two-storey rear extension, loft conversion, and alterations to the existing front entrance porch

  Received 16 Mar, published by the council 31 Aug 2026 Householder
• 5/2026/1055 Granted

  39 Oakwood Drive St Albans Hertfordshire Al4 0Ul

  Erection of a part single-storey, part two-storey wraparound extension, loft conversion including a rear dormer and rooflights, and construction of a front porch

  Received 1 Jun, published by the council 24 Jul 2026 Householder
• 5/2026/1278 Granted

  39 Foxcroft St Albans Hertfordshire Al1 5Ss

  Proposed C3 residential extension including two storey front and single storey front and side with internal alterations

  Received 1 Jul, published by the council 24 Jul 2026 Householder
• 5/2026/1170 Granted

  20 Nimrod Close St Albans Hertfordshire Al4 9Xy

  Extension of existing raised rear terrace with privacy screening and associated alterations to rear fenestration

  Received 17 Jun, published by the council 24 Jul 2026 Householder
• 5/2026/1338 Granted

  16 Hunters Ride Bricket Wood Hertfordshire Al2 3Lx

  Proposed front porch

  Received 11 Jul, published by the council 9 Aug 2026 Householder