19 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn

1. 18 Sep 2025

   Received by St Albans

2. 14 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 28 Jan 2026

   Decision issued: DC3 Conditional Permission

4. 21 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

• 25 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn

  TP/2026/0386 Submitted 7 Aug 2026 0m away

  Conifer (front garden) - Fell, this tree is now 55 foot high and is 20 feet in distance from the house (consent given historically to reduce by 30%)

  Decided Trees 7 docs

• 18 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

  TP/2021/0016 Submitted 12 Jan 2021 57m away

  Rear garden trees: 1 - Malus - Reduce in height by approximately 1m and bring sides into shape 2 - Norway Maple - Crown reduce to previous points to leave viable growth where possible. This would amount to a reduction of up to 4m.

  Granted Trees 4 docs

• 16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

  5/2026/1329 Submitted 6 Jul 2026 57m away

  Two storey side and rear extensions, single storey rear and side extensions, new rear attic dormer, new air conditioning unit, relocation of vehicular crossover

  Decided Householder Extension Loft or dormer 15 docs
  Small domestic

• 54 Amenbury Lane Harpenden Hertfordshire Al5 2Dq

  5/2026/1009 Submitted 21 May 2026 95m away

  Demolition of dwelling

  Decided Demolition 12 docs
  Domestic

• 9 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu

  TP/2026/0404 Submitted 24 Aug 2026 100m away

  Reduce 3 x Lawson Cypress, 1 x leylandii and 3 x Silver Birche by up to 4 metres each. Reduce overhanging branches from the Sycamore Tree which overhanging garden.

  Decided Trees 2 docs

• 13 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu

  TP/2021/0041 Submitted 3 Feb 2021 100m away

  Front garden trees: 1, 2 - Birch x 2 - Fell to ground level. Rear garden trees: 3,4 - Birch x 2 - Fell to ground level. 5 - Conifer - Remove the left hand side limb growing over the shed. 6 - Acer - Crown reduce by 2-3 metres to viable growth points. 7

  Granted Trees 9 docs
  Small domestic

• 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