1 High Dells Hatfield AL10 9JD Data via plota.co.uk
Proposal
Prior approval for a single storey rear extension measuring 4.50m in depth, 2.58m to the eaves and the maximum height of 2.75m Data via plota.co.uk
Application progress
Approved on 17 Sept 2026 · Delegated · Last checked 22 Sept 2026
Documents 7
Decision & officer reports 2
Plans & drawings 2
Consultation & comments 1
Site constraints 3
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 2
Last sold for £425,000 in December 2022. Semi-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 May 2018, the latest held for this property. The building may have changed since. View the certificate
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Important details
- Council
- Welwyn Hatfield
- Application type
- Class A – enlargement, improvement or other alteration of a dwellinghouse - PRIOR APPROVAL
- Postcode
- AL10 9JD
- Received
- 7 Aug 2026
- Validated
- 7 Aug 2026
- Parish
- Hatfield
- Case officer
- Show
- Decision
- Prior Approval Required and Granted
- Decision date
- 17 Sept 2026
- Decision level
- Delegated
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 41 days from validation, 15 days faster than Welwyn Hatfield's median of 56 for extensions. Approved, as 88% of extensions here are.
Plota live figures for extensions decided by Welwyn Hatfield in the last twelve months, from validation. Welwyn Hatfield decision record →
Public comments
1 neighbour consulted · Last counted 22 Sept 2026
Consultation & key dates
- Comments by
- 5 Sept 2026
Historical activity at this location
25 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Welwyn Hatfield is slower than most councils at deciding householder applications, ranking #224 out of 296. 50% of applications have the time limit extended, above the 41% national average. Householder applications are slightly less likely to be approved here (86%) 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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1 High Dells Hatfield AL10 9JD
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