27 Lytton Fields Knebworth Hertfordshire SG3 6BA
Approved on 7 September 2026
Council decision: Conditional Permission
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
Enlargement of existing front dormer windows and insertion of 2 no. front rooflights. Insertion of rear box dormer with 2 no. Juliette balconies. Replacement flat roof above existing rear element and demolition of existing conservatory. Front porch extension and alterations to fenestration.
- Received
- 3 August 2026
- Ward
- Knebworth Ward
- ReceivedReceived3 Aug
- ValidatedValidated3 Aug
- Consult.Consultation2 Sep
- TargetTarget Date28 Sep
- DecidedDecided7 Sep
Decided in 35 days (council typically 49)
About this application
This is a full planning application for demolition at 27 Lytton Fields Knebworth Hertfordshire SG3 6BA. North Hertfordshire has handled 2,848 applications of this type. This one was decided in 35 days, 2 weeks quicker than North Hertfordshire's typical decision time. There have been 2 other applications 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 6BA
- Application type
- Full Permission Householder
- Scale / size
- Small
- Parish
- Knebworth Parish Council
Planning application dates
- Date validated
- 3 August 2026
- Consultation expiry
- 2 September 2026
- Consultation end
- 2 September 2026
- Neighbour consultation end
- 2 September 2026
- Last date for comments
- 2 September 2026
- Target decision date
- 28 September 2026
Applicant and agent
- Applicant
- Private applicant
- Agent
- Mr Stuart Cook
- Architect profile
- HOME EXTENSION DESIGNS LTD
- Agent address
- Rear Of 62 Bridge Road East Welwyn Garden City AL7 1JU
Planning decision
- Case officer
- Thomas Howe
- Statutory period
- 56 days
Publicity
- Site notice end
- 2 September 2026
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.
Planning history at this site
2 other applications at this property, newest first.
Source: North Hertfordshire
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Around this site
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For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Avelex Electrical LtdElectrician0.1 mi
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Planning something similar?
See what the council approved and refused for loft conversions and dormers on your street. Pick your home and get the evidence before you pay for drawings.