178 Knella Road Welwyn Garden City AL7 3NN Data via plota.co.uk
Proposal
Erection of part single and part two storey rear extension with alterations to openings on rear elevation Data via plota.co.uk
Application progress
Approved on 21 Sept 2026 · Delegated · Last checked 22 Sept 2026
Documents 7
Decision & officer reports 2
Other documents 5
Site constraints 1
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England 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.
Building
From the energy performance certificate lodged in November 2025, the latest held for this property. The building may have changed since. View the certificate
Every application in Welwyn Hatfield - and every UK council - as a live feed, an API, or a bulk CSV export.
Nearby new applications
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Front garden alterations
Important details
- Council
- Welwyn Hatfield
- Application type
- HOUSEHOLDER APPLICATION
- Postcode
- AL7 3NN
- Received
- 27 Jul 2026
- Validated
- 28 Jul 2026
- Case officer
- Show
- Decision
- Granted
- Decision date
- 21 Sept 2026
- Decision level
- Delegated
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 55 days from validation, about the council's usual 56 days. 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 →
Consultation & key dates
- Comments by
- 3 Sept 2026
Historical activity at this location
10 nearby applications on record - archival context, not part of the live application.
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%).
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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178 Knella Road Welwyn Garden City AL7 3NN
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