Planning application
16 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dj
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
Timeline
Dates from the published record
-
25 Feb 2026
Received by St Albans
-
27 Mar 2026
Validated
Checked as complete and ready for consideration.
-
15 May 2026
Decision issued: DC3 Conditional Permission
-
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 documentsWhat 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
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
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 docsSmall domestic -
9 Kirkwick Avenue Harpenden Hertfordshire Al5 2Qu
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
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 docsSmall domestic -
19 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn
Proposed external air conditioning plant unit within an acoustic covering
Granted Householder 12 docsDomestic -
25 Rothamsted Avenue Harpenden Hertfordshire Al5 2Dn
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
Other householder applications
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
-
5/2026/0989 Granted
Mabel 30 Faircross Way St Albans Hertfordshire Al1 4Sd
Construction of single storey garden golf studio
-
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.
-
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
-
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.