23 Watton Road Knebworth Hertfordshire SG3 6AH Data via plota.co.uk
Proposal
Rear roof extension including insertion of rear dormer window and side rooflights to facilitate additional accommodation at first floor level following removal of existing rear dormer window. Data via plota.co.uk
Application progress
Approved on 17 Sept 2026 · Delegated · Last checked 19 Sept 2026
Site constraints 2
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
Sales history 3
Last sold for £785,000 in January 2021. Detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in March 2012, the latest held for this property. The building may have changed since. View the certificate
Every application in North Hertfordshire - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- North Hertfordshire
- Application type
- Full Permission Householder
- Postcode
- SG3 6AH
- Received
- 31 Jul 2026
- Validated
- 31 Jul 2026
- Ward
- Knebworth Ward
- Parish
- Knebworth Parish Council
- Case officer
- Show
- Target decision
- 25 Sept 2026
- Decision
- Conditional Permission
- Decision date
- 17 Sept 2026
- Decision level
- Delegated
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 48 days from validation, about the council's usual 49 days. Approved, as 92% of extensions here are.
Plota live figures for extensions decided by North Hertfordshire in the last twelve months, from validation. North Hertfordshire decision record →
Public comments
No public comments yet.
3 neighbours consulted · Last counted 19 Sept 2026
Consultation & key dates
- Comments by
- 12 Sept 2026
Historical activity at this location
23 nearby applications on record - archival context, not part of the live application.
Nearby activity
North Hertfordshire ranks #128 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (95%) than the national average (90%).
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
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23 Watton Road Knebworth Hertfordshire SG3 6AH
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