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Planning application

21 Townsend Lane Harpenden Hertfordshire Al5 2Py

Decided St Albans 5/2026/1363 Householder

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Installation of air-conditioning unit and acoustic barrier to existing unit

As published by the council, reference 5/2026/1363

Application record

Reference
5/2026/1363
Type
Householder
Status
Under Consultation
Decision
PENDING
Received
13 Jul 2026
Validated
14 Jul 2026
Ward
Harpenden West
Parish
Harpenden Town
Postcode
AL5 2PY

Comment by 19 September 2026

The council is taking comments on this application until then. Comments go to St Albans through their own planning portal.

Timeline

Dates from the published record

  1. 13 Jul 2026

    Received by St Albans

  2. 14 Jul 2026

    Validated

    Checked as complete and ready for consideration.

  3. 25 Aug 2026

    Added to PlanIndex

Documents

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

9 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

After the decision

The process from here

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.

About householder applications

How this application type works

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

Nearby applications

Within 500 metres

  • 1 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2026/1376 Submitted 17 Jul 2026 0m away

    Two storey side/rear extensions, roof and internal alterations

    Decided Householder Extension 9 docs
    Domestic

  • 15 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2026/0841 Submitted 28 Apr 2026 0m away

    Discharge of Condition 6 (replacement tree planting) of planning permission 5/2023/2311 dated 20/05/2025 for Construction of five bedroom detached dwelling with integral garage and outbuilding to rear of garden following demolition of existing dwelling an

    Granted Conditions New dwelling Demolition 7 docs
    Small domestic

  • 21 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2025/2368 Submitted 11 Dec 2025 0m away

    Installation of air source heat pump and air conditioning unit

    Decided Householder 19 docs
    Domestic

  • 4 Townsend Lane Harpenden Hertfordshire Al5 2Qe

    5/2026/1211 Submitted 23 Jun 2026 95m away

    Conversion of existing garage into a living room. New and replacement doors, windows & roof light to the existing house, with minor internal layout alterations.

    Decided Householder Loft or dormer Windows or glazing 13 docs
    Domestic

  • 5A Kirkdale Road Harpenden Hertfordshire Al5 2Pt

    TP/2020/0827 Submitted 21 Dec 2020 112m away

    The tree is a Scots Pine tree at the very back left of my back garden. A tree surgeon advised the branches are dividing and splitting dangerously and the damage suggests the tree is unwell. He advised significant limb shortening, cutting back damaged limb

    Granted Trees 3 docs

  • 25 Kirkdale Road Harpenden Hertfordshire Al5 2Pt

    TP/2020/0825 Submitted 21 Dec 2020 112m away

    Rear garden left hand corner - Singular Poplar tree - Fell tree. The tree has outgrown its location, presentation of fungus on the exterior giving rise to the tree's health, extensive roots intercepting surrounding neighbour's land and excessive shading.

    Granted Trees 2 docs

In St Albans

  • 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