9 Mardley Hill Welwyn AL6 0UE Data via plota.co.uk
Proposal
Erection of single storey front, side and rear extension, raising the existing roof and formation of rear dormer. Alterations to the fenestration, including, installation of new windows and doors and external rendering and cladding, following the demolition of garage and porch… Data via plota.co.uk
Application progress
This application is under consideration - no decision has been issued yet. Plota predicted a decision around 14 Sept 2026; it is now day 66. The consultation period closed on 7 Aug 2026.
Documents 19
Statements & assessments 1
Plans & drawings 3
Consultation & comments 3
Other documents 12
Site constraints 3
Checked on 11 September 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.
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Important details
- Council
- Welwyn Hatfield
- Application type
- HOUSEHOLDER APPLICATION
- Postcode
- AL6 0UE
- Received
- 10 Jul 2026
- Validated
- 10 Jul 2026
- Parish
- Welwyn
- Case officer
- Show
- Decision level
- Delegated
- Applicant
- Show
- Agent
- Show
Decision outlook
Day 66, past the statutory target. 85% of demolitions in Welwyn Hatfield are decided within thirteen weeks, which runs to 9 Oct 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 7 Sept 2026.
Plota live figures for demolitions decided by Welwyn Hatfield in the last twelve months, from validation. Welwyn Hatfield decision record →
Public comments
6 neighbours consulted · Last counted 7 Sept 2026
Consultation & key dates
- Comments by
- 7 Aug 2026
Historical activity at this location
25 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%).
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9 Mardley Hill Welwyn AL6 0UE
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