Skip to content
PlanIndex Get alerts
Menu

Planning application

21 Townsend Lane Harpenden Hertfordshire Al5 2Py

Granted St Albans 5/2025/2368 Householder

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

Proposal

Installation of air source heat pump and air conditioning unit

As published by the council, reference 5/2025/2368

Application record

Reference
5/2025/2368
Type
Householder
Status
Approved
Decision
Granted As published: DC3 Conditional Permission
Received
11 Dec 2025
Validated
2 Mar 2026
Decided
22 May 2026
Ward
Harpenden West
Parish
Harpenden Town
Decision by
Delegated
Postcode
AL5 2PY

Site history

Applications at this address on the St Albans register

This site has had 2 applications since 2025: 1 approved, 0 refused.

  • 5/2026/1363 Awaiting decision

    21 Townsend Lane Harpenden Hertfordshire Al5 2Py

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

    Submitted 13 Jul 2026 Householder

Timeline

Dates from the published record

  1. 11 Dec 2025

    Received by St Albans

  2. 2 Mar 2026

    Validated

    Checked as complete and ready for consideration.

  3. 22 May 2026

    Decision issued: DC3 Conditional Permission

  4. 24 Jul 2026

    Added to PlanIndex

Documents

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

19 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 this grant of permission means

St Albans granted permission on 22 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 0.3 miles

  • 5 Townsend Lane Harpenden Hertfordshire Al5 2Py

    TP/2026/0490 Submitted 28 Sep 2026 50 yards away

    98% historically approved · decision due ~24 Nov

    T1 Beech - Crown reduction by up to 2m approx, give 4m clearance from building and crown lift over the highway to the legal limit 5.2m

    Awaiting decision Trees 5 docs
  • 21 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2026/1363 Submitted 13 Jul 2026 50 yards away

    89% historically approved · decision due ~8 Sep

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

    Awaiting decision Householder 11 docs
    Domestic
  • 1 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2026/1376 Submitted 17 Jul 2026 50 yards away

    Two storey side/rear extensions, roof and internal alterations

    Withdrawn Extension 9 docs
  • 15 Townsend Lane Harpenden Hertfordshire Al5 2Py

    5/2026/0841 Submitted 28 Apr 2026 50 yards 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
  • 4 Aplins Close Harpenden Al5 2Qd

    TP/2016/0567 Submitted 8 Dec 2016 50 yards away

    Fell Cypress tree in rear garden.

    Granted Trees 2 docs
  • 4 Townsend Lane Harpenden Hertfordshire Al5 2Qe

    5/2026/1211 Submitted 23 Jun 2026 100 yards 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.

    Granted Householder Loft or dormer Windows or glazing 15 docs
    Domestic

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