100 Crabtree Lane Harpenden Hertfordshire Al5 5Rf

1. 13 Apr 2026

   Received by St Albans

2. 14 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

St Albans has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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.

• 153 Crabtree Lane Harpenden Hertfordshire Al5 5Rd

  5/2017/2504 Submitted 3 Sep 2017 56m away

  Certificate of Lawfulness (proposed) - Loft conversion with rear dormer window

  Granted Lawful development Loft or dormer Windows or glazing 7 docs

• 33 Holly Walk Harpenden Hertfordshire Al5 5Rg

  5/2017/2734 Submitted 27 Sep 2017 69m away

  Certificate of Lawfulness (proposed) - Hip to gable and rear dormer loft conversion with front roof lights and rear dormer windows

  Granted Lawful development Loft or dormer Windows or glazing 7 docs

• 46 Granby Avenue Harpenden Hertfordshire Al5 5Qr

  5/2017/2766 Submitted 1 Oct 2017 146m away

  Demolition of existing dwelling and construction of two, three bedroom semi-detached dwellings (resubmission following approval of 5/2017/1892 dated 19/09/2017)

  Granted Demolition 14 docs
  Domestic

• 14 Tylers Harpenden Hertfordshire Al5 5Rt

  5/2026/0348 Submitted 24 Feb 2026 163m away

  Single storey front extension & conversion of existing garage plus addition of patio doors to rear elevation

  Granted Householder Extension Windows or glazing 16 docs
  Small domestic

• 7 Tylers Harpenden Hertfordshire Al5 5Rt

  5/2025/2282 Submitted 15 Dec 2025 163m away

  Single-storey rear extension, ground-floor front infill extension and first-floor front extension

  Granted Householder Extension 13 docs
  Small domestic

• 23 Granby Avenue Harpenden Hertfordshire Al5 5Qp

  5/2026/0398 Submitted 3 Mar 2026 184m away

  Two storey rear extension, single storey side and rear extension, alteration to openings and rooflights, replacement windows and doors, new roof awning over front door

  Granted Householder Extension Loft or dormer +2 11 docs
  Small domestic

• 5/2026/1089 Granted

  25 High Firs Crescent Harpenden Hertfordshire Al5 1Nb

  Removal of the existing flat roof and construction of a pitched roof to the front elevation

  5 Jun 2026 Householder
• 5/2026/0989 Granted

  Mabel 30 Faircross Way St Albans Hertfordshire Al1 4Sd

  Construction of single storey garden golf studio

  18 May 2026 Householder
• 5/2026/0631 Granted

  28 Wroxham Way Harpenden Hertfordshire Al5 4Pp

  Proposed two storey side and rear extension and single storey rear extension, alterations to patio, boundary treatments and landscaping.

  27 Mar 2026 Householder
• 5/2026/1265 Granted

  43 Granby Avenue Harpenden Hertfordshire Al5 5Qp

  Following demolition of store rooms etc, proposed two-storey side and rear extensions, single-storey side and rear extensions along with internal and external alterations, new openings and chimney removal

  30 Jun 2026 Householder
• 5/2026/1152 Granted

  43A Moreton End Lane Harpenden Hertfordshire Al5 2Ha

  Addition of flat roof dormers to the first-floor ensuite bathroom on both the front and rear elevations. New utility room added to the rear of the garage space.

  15 Jun 2026 Householder