21 Grasmere Avenue Harpenden Hertfordshire Al5 5Pt

1. 26 Nov 2025

   Received by St Albans

2. 27 Nov 2025

   Validated

   Checked as complete and ready for consideration.

3. 17 Apr 2026

   Decision issued: DC3 Conditional Permission

4. 25 Aug 2026

   Added to PlanIndex

St Albans granted permission on 17 April 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.

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.

• 7 Grasmere Avenue Harpenden Hertfordshire Al5 5Pt

  5/2025/2257 Submitted 10 Dec 2025 50 yards away

  Two storey side and rear extension, single storey side and rear extension, front porch, alterations to openings

  Granted Householder Extension 12 docs
  Small domestic

• 7 Grasmere Avenue Harpenden Hertfordshire Al5 5Pt

  5/2026/1222 Submitted 25 Jun 2026 50 yards away

  Two storey side and rear extension, single storey side and rear extension, front porch, alterations to openings

  Granted Householder Extension 11 docs
  Small domestic

• 24 Lyndhurst Drive Harpenden Hertfordshire Al5 5Rj

  5/2026/0945 Submitted 12 May 2026 150 yards away

  Proposed first floor side/front extension

  Granted Householder Extension 12 docs
  Domestic

• 20 Dalkeith Road Harpenden Hertfordshire Al5 5Pw

  5/2016/2957 Submitted 29 Sep 2016 150 yards away

  Part single part two storey rear extension with new canopy and decking, two storey side extension, loft conversion with rear dormer and addition of front and side facing rooflights

  Granted Householder Extension Loft or dormer 10 docs
  Domestic

• 17 Dalkeith Road Harpenden Hertfordshire Al5 5Pp

  5/2021/1332 Submitted 5 May 2021 200 yards away

  Removal of existing shed and greenhouse and erection of garden room

  Granted Householder 9 docs
  Small domestic

• 55 Dalkeith Road Harpenden Hertfordshire Al5 5Pp

  5/2016/1912 Submitted 20 Jun 2016 200 yards away

  First floor rear extension with juliet balcony

  Granted Householder Extension 10 docs
  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