Project record, campus
Equinix Hertfordshire campus (South Mimms)
Equinix has outline planning permission from Hertsmere Borough Council for a data centre campus at South Mimms, application 24/1152/OUTEI for up to 187,000 square metres of floor space. Equinix says reserved matters for phase 1a have been submitted. No MW figure was found in the sources checked. Equinix expects construction to begin in 2027 and the campus to open in 2031, when the National Grid connection is planned, with about 200 staff.
Reported figures
No figures are published for this record. Not disclosed is not zero.
Each figure is shown as reported, with its own definition. IT, facility, grid and thermal figures are never added together. Capacity definitions.
Sources (2), last checked 19 Oct 2026
- Planning application 24/1152/OUTEI, land east of South Mimms Services (opens in a new tab), Hertsmere Borough Council (via planning.org.uk), accessed 19 Oct 2026
- Hertfordshire Campus: frequently asked questions (opens in a new tab), Equinix, accessed 19 Oct 2026
Last checked 19 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.