19 Cornwall Road Harpenden Hertfordshire Al5 4Tq

1. 11 Oct 2016

   Received by St Albans

2. 17 Oct 2016

   Validated

   Checked as complete and ready for consideration.

3. 13 Dec 2016

   Decision issued: DC3 Conditional Permission

4. 9 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 33 Cornwall Road Harpenden Al5 4Tq

  TP/2017/0447 Submitted 1 Sep 2017 0m away

  1 x Cherry - Reduce by 30%. 1 x Crabapple - Reduce by 30%.

  Granted Trees 2 docs

• 2 Cornwall Road Harpenden Hertfordshire Al5 4Th

  TP/2020/0801 Submitted 8 Dec 2020 40m away

  Yew in rear garden (over shed garage ) - reduce back over shed by 2m. Hornbeam in hedge - reduce by 2m. Yew at roadside - trim slightly (less than 1m crown reduction).

  Granted Trees 1 doc
  Small domestic

• 2C Cornwall Road Harpenden Hertfordshire Al5 4Th

  TP/2026/0375 Submitted 30 Jul 2026 40m away

  Purple Plum x2 - Fell, trees in the front garden in significant decline

  Decided Trees 2 docs

• 14 Cornwall Road Harpenden Hertfordshire Al5 4Th

  5/2021/0735 Submitted 12 Mar 2021 40m away

  Erection of part single storey rear extension, with conversion of existing loft and installation of rear dormer window

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

• 2 Cornwall Road Harpenden Hertfordshire Al5 4Th

  5/2016/1831 Submitted 13 Jun 2016 40m away

  Two storey side extension and the addition of two dormer windows on the roof of the rear elevation to incorporate loft conversion

  Decided Householder Extension Loft or dormer +1 17 docs
  Domestic

• 10 Devonshire Road Harpenden Hertfordshire Al5 4Tj

  TP/2026/0359 Submitted 22 Jul 2026 102m away

  G1-Beech hedges-Reduce in height to 2 metres to maintain size and shape. G2-Conifer hedges-Reduce in height to 2 metres to maintain size and shape. T1-Elm-Lift crown to 2 metres to maintain size. T2-Willow-Remove damaged branches for safety T3-Ash-Fell to

  Decided Trees 2 docs

• 5/2026/1173 Decided

  6 Longacres St Albans Hertfordshire Al4 0Dr

  Demolition of existing outbuilding and construction of single storey rear extension

  18 Jun 2026 Householder
• 5/2026/0299 Decided

  12 Rowlatt Drive St Albans Hertfordshire Al3 4Nb

  Demolition of existing side and rear extension and construction of a canopy porch, part single, part two storey front, two storey side and single storey rear extension

  17 Feb 2026 Householder
• 5/2026/0318 Refused

  7 Ardens Way St Albans Hertfordshire Al4 9Uw

  Demolition of existing side canopy, detached garage, rear patio and garden shed and the construction of two storey front, side and rear extensions, together with part single storey rear extension and a front porch canopy and extension to driveway

  19 Feb 2026 Householder
• 5/2026/1139 Decided

  50 Fontmell Close St Albans Hertfordshire Al3 5Hu

  Single storey rear extension and side windows with top openers over 1.7m high

  10 Jun 2026 Householder
• 5/2026/0525 Decided

  11 Hillside Road Harpenden Hertfordshire Al5 4Bs

  Garage conversion, with part roof extension and new front porch extension

  17 Mar 2026 Householder