23 Topstreet Way Harpenden Hertfordshire AL5 5TU
Approved on 2 July 2026
Council decision: DC3 Conditional Permission3 conditions
Proposal
Two storey front extension, first floor rear extension, alterations to facade windows and cladding plus addition of solar roof panels at 23 Topstreet Way Harpenden Hertfordshire AL5 5TU
- Ward
- Harpenden West
- Agent
- Seth White Architects
- ReceivedSubmitted
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided2 Jul
About this application
This is a planning application for a rear extension at 23 Topstreet Way Harpenden Hertfordshire AL5 5TU. St Albans has handled 12,346 applications of this type. There are no previous applications recorded at this address. In the past year there have been 196 applications across Harpenden West. We hold 3,774 applications in total for the AL5 postcode area.
Application details
- Postcode
- AL5 5TU
Applicant and agent
- Applicant
- Private applicant
- Agent
- Seth White Architects
- Architect profile
- SETH WHITE ARCHITECTS LIMITED
Site constraints
Designations at the address point. Ones next to the site may also apply.
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (24)
flood storage areas, conservation areas, listed buildings, Article 4 directions, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Source: St Albans
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Around this site
Nearby applications
- 11 Topstreet Way Harpenden Hertfordshire Al5 5Tu5/2014/0989 · FullApproved0.0 mi
- 31 Topstreet Way Harpenden Al5 5Tu5/2008/1943 · FullApproved0.0 mi
- 15 Topstreet Way Harpenden Hertfordshire Al5 5Tu5/2015/0632 · FullApproved0.0 mi
- 15 Topstreet Way Harpenden Hertfordshire Al5 5Tu5/2014/2860 · FullRefused0.0 mi
- 11 Topstreet Way Harpenden Al5 5Tu5/2008/1800 · FullRefused0.0 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Harpenden Window Co. LtdWindow & Door Installer0.1 mi
- Kitchens LtdElectrician0.2 mi
- Oaklands Roofing And Building LimitedHarpenden0.2 mi
- S.Miller Electrical LtdElectrician0.3 mi
Planning something similar?
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