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Planning application

16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

Awaiting decision St Albans 5/2026/1329 Householder

Works: Extension Loft or dormer Small domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 5/2026/1329

Application record

Reference
5/2026/1329
Type
Householder
Status
Under Consideration
Received
6 Jul 2026
Validated
6 Aug 2026
Ward
Harpenden West
Parish
Harpenden Town
Postcode
AL5 2DJ

Site history

Applications at this address on the St Albans register

This site has had 2 applications since 2026: 1 approved, 0 refused.

  • 5/2026/0467 Granted

    16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

    Single storey side extension

    Decided 15 May 2026 Householder

Timeline

Dates from the published record

  1. 6 Jul 2026

    Received by St Albans

  2. 6 Aug 2026

    Validated

    Checked as complete and ready for consideration.

  3. 15 Aug 2026

    Added to PlanIndex

  4. 17 Sep 2026

    Status changed to Under Consideration

    Previously Under Consultation.

  5. Decision

    Awaiting decision

    Decision expected by 1 October 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.

Documents

Plans, drawings, consultee responses and the officer's report

18 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

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.

About householder applications

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.

Nearby applications

Within 0.3 miles

  • 18 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

    TP/2021/0016 Submitted 12 Jan 2021 50 yards 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

    5/2026/0467 Submitted 25 Feb 2026 50 yards away

    Single storey side extension

    Granted Householder Extension 10 docs
    Small domestic

  • 9 Kirkwick Avenue Harpenden Al5 2Qu

    TP/2016/0485 Submitted 23 Oct 2016 50 yards away

    Fell Hornbeam tree in rear garden.

    Granted Trees 2 docs

  • 9 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu

    TP/2026/0404 Submitted 24 Aug 2026 50 yards away

    98% historically approved · decision due ~20 Oct

    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.

    Awaiting decision Trees 2 docs

  • 13 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu

    TP/2021/0041 Submitted 3 Feb 2021 50 yards 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

  • 17 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn

    TP/2026/0494 Submitted 28 Sep 2026 50 yards away

    98% historically approved · decision due ~24 Nov

    T2 Beech - Crown reduction by 2-3m approx (primary cuts) and thin canopy by 15-20% G1 Cypress - Fell T3 Silver Birch - Crown reduction by 2-3m approx (primary cuts)

    Awaiting decision Trees 5 docs

In St Albans

  • 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