Planning application
21 Townsend Lane Harpenden Hertfordshire Al5 2Py
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
- 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 Decided
21 Townsend Lane Harpenden Hertfordshire Al5 2Py
Installation of air-conditioning unit and acoustic barrier to existing unit
Timeline
Dates from the published record
-
11 Dec 2025
Received by St Albans
-
2 Mar 2026
Validated
Checked as complete and ready for consideration.
-
22 May 2026
Decision issued: DC3 Conditional Permission
-
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.
Trade members open them from here.
Open the documentsWhat 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 500 metres
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21 Townsend Lane Harpenden Hertfordshire Al5 2Py
Installation of air-conditioning unit and acoustic barrier to existing unit
Decided Householder 9 docsDomestic -
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15 Townsend Lane Harpenden Hertfordshire Al5 2Py
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
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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
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Granted Trees 2 docs
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5/2026/0631 Granted
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5/2026/1265 Granted
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5/2026/1152 Granted
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