Planning application
6/2026/0921/FULL
17 Tewin Road Welwyn Garden City AL7 1BD
Proposal
Erection of a substation and ancillary infrastructure
As published by the council, reference 6/2026/0921/FULL
Timeline
Dates from the published record
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22 May 2026
Received by Welwyn Hatfield
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17 Jul 2026
Decision issued: Granted
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24 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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6/2024/2296/FULL Awaiting decision
Arundel House Garnell Business Park Brownfields Welwyn Garden City AL7 1AY
Change of use from Commercial Property (Class E) to Place of Worship (Class F1)
-
6/2025/2413/VAR Awaiting decision
Norton Building Bridge Road East Welwyn Garden City AL7 1JR
Variation of conditions Condition 9 (Land contamination), Condition 10 (Piling Method Statement and foundation works risk assessment), Condition 12 (Construction Management Plan), Condition 13 (Detailed drawings), Condition 14 (Construction drawings for flooding risk management), Condition 15 (Construction phase surface water management plan), Condition 16 (Water supplies and fire hydrants), Condition 17 (Cycle storage), Condition 18 (Energy saving technologies), Condition 19 (Landscaping details), Condition 20 (Samples of materials), Condition 22 (Survey and verification report for surface water drainage system), Condition 23 (Maintenance and management of the sustainable drainage scheme) Condition 24 (Lighting strategy for bats), Condition 25 (Noise mitigation), Condition 26 (Surface water interception and disposal), Condition 28 (EV charging spaces), Condition 29 (Water efficiency and water reduction measures), Condition 30 (BREEAM certification), Condition 31 (Recycling and waste storage), Condition 32 (Overarching Travel Plan and Plot Travel Plans), Condition 41 (Approved landscaping details) and Condition 42 (Approved Drawings) on planning permission 6/2024/0908/MAJ
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6/2026/0766/MAJ Awaiting decision
45-63 Brownfields Mill Brownfields Welwyn Garden City AL7 1AN
Erection of an additional storey to the roof of the building to accommodate additional office space.
-
6/2021/0636/COND Granted
56 Bridge Road East Welwyn Garden City AL7 1JU
Submission of details pursuant to condition 1 on planning permission 6/2018/2871/PN11 for the change of use from offices (B1a) to residential (C3)
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6/2023/0294/TPO Granted
17-21 Brownfields Welwyn Garden City AL7 1AN
2 x Oak trees T1 & T2 - to remove major deadwood over access road and reduce low limbs from over buildings by 1m (1 currently touching chimney stack), crown lift to 5m. Both trees are overhanging privately owned industrial property and access road in Brownfields.
-
6/2026/0717/COND Awaiting decision
73 Bridge Road East Welwyn Garden City AL7 1UT
Submission of details pursuant to Condition 16 (Hard & Soft Landscape Works), condition 18 (External lighting schemes) on planning permission 6/2020/2268/MAJ allowed under appeal APP/C1950/W/21/3284525
Other full applications applications
In Welwyn Hatfield
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6/2026/0686/FULL Withdrawn
11 Georges Wood Road Brookmans Park AL9 7BY
Erection of new dwelling and associated hard and soft landscaping following demolition of the existing dwelling and the detached garage
-
6/2026/0400/FULL Granted
Bothys field land at Holwell Court Farm Holwell Court Hatfield AL9 5RL
Erection of a hay store and a machinery store
-
6/2025/2403/FULL Refused
1 High Dells Hatfield AL10 9JD
Erection of a two-storey dwelling as a subdivision of the existing plot, with associated car parking areas and erection of a single-storey rear extension to the existing property
-
6/2026/0982/FULL Granted
Tesco Superstore Great North Road Hatfield AL9 5JY
Installation of one self service laundry kiosk to Tesco superstore curtilage
-
6/2025/2445/FULL Withdrawn
Tesco Heart Building Car Park Shire Park Welwyn Garden City AL7 1TW
Installation of one padel tennis court as an additional ancillary sporting and recreational facility to the Tesco office headquarters, together with associated floodlighting, hard and soft landscaping works