Land East Of South Mimms Services St Albans Road South Mimms Hertfordshire Data via plota.co.uk

26/03764/OA - Other Authority Application in Progress

Proposal

Application for the approval of reserved matters relating to site-wide advanced infrastructure and enabling works (Phase 1a), including a permanent vehicular access off Swanland Road which will facilitate a temporary access during construction, a permanent emergency vehicle access off Bridgefoot Lane, pedestrian and cycle routes, internal roads, car and cycle parking, hard and soft landscaping, on-site water attenuation, temporary and permanent campus bridges, utilities and services, a security gatehouse, substations, ancillary buildings and service yards, the creation of development platforms to support the phased data centre development, and all associated infrastructure pursuant to outline planning permission reference . Data via plota.co.uk

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View original council record ↗Last checked 28 Oct 2026, 08:10

Application progress

✓

Received

1 Sept 2026

Decision

Target date was 15 Sept 2026

Under consideration

No decision has been issued yet. Plota predicted a decision around 29 Oct 2026; it is now day 58.

Documents

View the documents on the council's website ↗

Site constraints 4

Green belt: London

Inappropriate development needs very special circumstances.

Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.

Read the government guidance ↗

Also on the record

Radon affected area, class 3; Inside the South Mimms built-up area; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.

Not affected

Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 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.

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