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Planning application

16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

Granted St Albans 5/2026/0467 Householder

Works: Extension Small domestic

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

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Single storey side extension

As published by the council, reference 5/2026/0467

Application record

Reference
5/2026/0467
Type
Householder
Status
Approved
Decision
DC3 Conditional Permission
Received
25 Feb 2026
Validated
27 Mar 2026
Decided
15 May 2026
Ward
Harpenden West
Parish
Harpenden Town
Decision by
Delegated
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.

  • 5/2026/1329 Decided

    16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

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

    Submitted 6 Jul 2026 Householder

Timeline

Dates from the published record

  1. 25 Feb 2026

    Received by St Albans

  2. 27 Mar 2026

    Validated

    Checked as complete and ready for consideration.

  3. 15 May 2026

    Decision issued: DC3 Conditional Permission

  4. 13 Sep 2026

    Added to PlanIndex

Documents

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

10 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.

Trade members open them from here.

Open the documents

What this grant of permission means

St Albans granted permission on 15 May 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.

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 500 metres

  • 18 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj

    TP/2021/0016 Submitted 12 Jan 2021 0m 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 0m 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 17 docs
    Small domestic
  • 9 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu

    TP/2026/0404 Submitted 24 Aug 2026 44m 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 44m 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
  • 19 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn

    5/2025/1715 Submitted 18 Sep 2025 57m away

    Proposed external air conditioning plant unit within an acoustic covering

    Granted Householder 12 docs
    Domestic
  • 25 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn

    TP/2026/0386 Submitted 7 Aug 2026 57m 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

In St Albans

  • 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