Decision Data via plota.co.uk
Proposal
Erection of a single storey rear extension, hip to gable loft conversion, installation of a flat roof rear dormer and a pitch roof dormer and rooflight to the front roof slope. Installation of an obscure glazed window on the first floor side elevation of the dwelling, demolition of an existing chimney stack, installation of 4x rooflights to the existing front projection and render finish to external walls. Data via plota.co.uk
Application progress
Approved on 7 Nov 2025 · Delegated · Last checked 15 Oct 2026
Documents 11
Decision & officer reports 2
Statements & assessments 1
Plans & drawings 6
Consultation & comments 1
Other documents 1
Site constraints 4
Checked on 15 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.
Building
From the energy performance certificate lodged in August 2023, 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.
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Important details
- Council
- Welwyn Hatfield
- Application type
- HOUSEHOLDER APPLICATION
- Received
- 15 Aug 2025
- Validated
- 19 Aug 2025
- Parish
- North Mymms
- Case officer
- Show
- Decision
- Granted
- Decision date
- 7 Nov 2025
- Decision level
- Delegated
- Appeal
- Allowed · 15 Jan 2026 · Written Representations · Inspectorate case 3373375 ↗
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 80 days from validation, 24 days slower than Welwyn Hatfield's median of 56 for householder applications. Approved, as 86% of householder applications here are.
Plota live figures for householder applications decided by Welwyn Hatfield in the last twelve months, from validation. Welwyn Hatfield decision record →
Consultation & key dates
- Comments by
- 17 Sept 2025
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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