3 Swangleys Lane Knebworth Hertfordshire SG3 6AA
Approved on 29 January 2026
Council decision: Conditional PermissionDelegated (officer decision)2 conditions
Boundary © HM Land Registry, © Ordnance Survey · details
This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.
Proposal
Single storey rear extension following partial demolition of existing rear element and removal of existing lean-to, outbuildings, and chimney
- Received
- 10 December 2025
- Decision level
- Delegated (officer decision)
- Ward
- Knebworth Ward
- ReceivedReceived10 Dec
- ValidatedValidated10 Dec
- Consult.Consultation11 Jan
- TargetTarget Date4 Feb
- DecidedDecided29 Jan
Decided in 50 days (council typically 49)
About this application
This is a full planning application for demolition at 3 Swangleys Lane Knebworth Hertfordshire SG3 6AA. North Hertfordshire has handled 2,848 applications of this type. This one was decided in 50 days. The site is in 1 listed building nearby. There are no previous applications recorded at this address. In the past year there have been 90 applications across Knebworth Ward. We hold 149 applications in total for the SG3 postcode area.
92% of full applications at North Hertfordshire District Council were approved. Across all application types, the council typically decides in about 7 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- SG3 6AA
- Application type
- Full Permission Householder
- Scale / size
- Small
- Parish
- Knebworth Parish Council
Planning application dates
- Date validated
- 10 December 2025
- Consultation expiry
- 18 January 2026
- Consultation end
- 11 January 2026
- Neighbour consultation end
- 18 January 2026
- Last date for comments
- 18 January 2026
- Target decision date
- 4 February 2026
- Permission expires
- 29 January 2029
Applicant and agent
- Agent
- Mr Richard Chambers
- Agent address
- 72 Lytton Avenue Letchworth SG6 3HY United Kingdom
Planning decision
- Case officer
- Tom Rea
- Statutory period
- 56 days
Site constraints
Designations that overlap or adjoin the site outline.
- Flood zone 1: Low probability (rivers and sea)
Not published by this council, so not checked: Article 4 directions. Ask the council if these matter.
Possibly incomplete for this council: tree preservation orders.
Also checked, none recorded (22)
flood storage areas, conservation areas, listed buildings, 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: North Hertfordshire
Track this application
Get email alerts when there is a planning decision or status change.
Get email alerts near SG3
New planning applications delivered to your inbox daily.
Around this site
Nearby applications
- Land In Front Of 114 London Road Knebworth Hertfordshire SG3 6HB25/00915/ECApproved0.1 mi
- 125 London Road Knebworth Hertfordshire SG3 6EX23/00934/FP · FullWithdrawn0.1 mi
- 129 London Road Knebworth Hertfordshire SG3 6EX25/01038/FP · FullApproved0.1 mi
- 148 - 150 London Road Knebworth Hertfordshire SG3 6EY25/02962/AD · AdvertisingApproved0.1 mi
- Land At 137 London Road Knebworth Hertfordshire24/00546/AD · AdvertisingApproved0.2 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- MH Goldsmith & Sons LtdElectrician0.2 mi
- DC Electrix LtdElectrician0.3 mi
- Robinz LtdElectrician0.4 mi
- Avelex Electrical LtdElectrician0.5 mi
Planning something similar?
See what the council approved and refused for single-storey rear extensions on your street. Pick your home and get the evidence before you pay for drawings.