Marlborough Court Green Close Brookmans Park AL9 7ST Data via plota.co.uk
Proposal
Three storey side extension comprising an enlarged building to support the change of use of the first floor from storage to a two-bedroom flat, new entry and staircase and the creation of two terrace areas, new parking layout to create a total of three parking spaces. New roof structure including installation of four front dormers to create an additional floor accommodating a further new one-bedroom flat. Addition of a further dormer to the existing flat at No.19. Conversion of existing entry area to bike store and meter cupboard and the relocation of the refuse storage Data via plota.co.uk
Application progress
Approved on 10 Jul 2025 · Delegated · Last checked 20 Oct 2026
Documents 31
Decision & officer reports 2
Statements & assessments 2
Plans & drawings 9
Consultation & comments 6
Other documents 12
Associated applications 3
- Three storey side extension comprising an enlarged building to support the change of use of the first floor from storage…
Conditions details submitted for 1
Site constraints 2
Checked on 18 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 April 2016, 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
- FULL PERMISSION
- Postcode
- AL9 7ST
- Received
- 7 Mar 2025
- Validated
- 11 Mar 2025
- Parish
- North Mymms
- Case officer
- Show
- Decision
- Granted
- Decision date
- 10 Jul 2025
- Decision level
- Delegated
- Applicant
- Show
- Agent
- Show
How this decision compares
Decided in 121 days from validation, 38 days slower than Welwyn Hatfield's median of 83 for full applications. Approved, as 77% of full applications here are.
Plota live figures for full applications decided by Welwyn Hatfield in the last twelve months, from validation. Welwyn Hatfield decision record →
Public comments
12 neighbours consulted · Last counted 20 Oct 2026
Consultation & key dates
- Comments by
- 9 Jul 2025
Historical activity at this location
30 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%).
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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Marlborough Court Green Close Brookmans Park AL9 7ST
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