Data Center Campus
Data4: Milan 1 Campus
Data4's first Italian campus, on the former Italtel-Siemens industrial site that straddles Cornaredo and Settimo Milanese west of Milan. First built in 2014, with expansions planned through 2029.
Campus at a Glance
Data4's Milan 1 campus (MIL01) sits at Via Monzoro 101-105 on the former Italtel (ex Siemens) "Il Castelletto" industrial complex. The site straddles Cornaredo and Settimo Milanese, about 10 km west of central Milan. The Parco Agricolo Sud Milano borders it to the south. Equinix, Vantage and Microsoft operate in the same Castelletto cluster.
Land. Data4 assembled about 19 ha in four lots:
- Campus plot: 82,710 m², bought from Release S.p.A. in 2013.
- Verdi-Tower plot: 24,176 m², bought from Microsoft under the Castelletto 2 plan.
- Canteen plot: 40,614 m², bought from Nabucco in December 2021.
- Villa Cascina plot: 43,210 m², bought from Italtel in August 2022.
The redevelopment included asbestos removal and demolition of the Italtel buildings. On the Villa Cascina plot, the 18th-century Villa Litta-Modignani becomes an events venue and the Cascina becomes Data4 Italy's offices.
Ownership. DATA4 Italy S.p.A. and DATA4 Milan S.p.A. hold the campus. Both are part of Data4 Group, which Brookfield Infrastructure bought from AXA IM Alts in 2023.
Power infrastructure.
- An on-site 132/15 kV substation with two 57 MVA transformers. Two dedicated underground 132 kV feeds supply it, from Terna's Baggio 380/132 kV station and Enel's Settimo Milanese station.
- The first building takes 15 kV from an Enel medium-voltage substation.
- A second, 220/20 kV substation with two 170 MVA transformers is under construction on the Villa Cascina plot. It is fed first by a provisional underground 220 kV line, then by two new 220 kV lines to a future Terna station to the north.
- Buildings carry N+1 diesel generators (2,500-3,250 kVA units) with at least 72 hours of fuel, plus rooftop and facade solar. Supply is 100% renewable.
Connectivity. More than 70 carriers, dedicated MIX and TOP-IX points of presence, and access to more than 150 cloud platforms.
Certifications. ANSI/TIA-942 Rated 4, ISO 9001, 14001, 27001, 45001 and 50001, LEED, PCI DSS, and the EU Code of Conduct for Data Centres.
Permitting. Data4 permitted each building individually from 2013. In December 2024 it filed a state environmental impact assessment for the full masterplan (MASE ID_VIP 13540). In February 2026 it filed single-permit (PUCD) applications for lots A-B and C-D. Data4 announced a EUR 2 billion Italy investment plan through 2030 in June 2024.
Buildings
Sites on this Campus
| Site | Operator | Status | Operational | Building Size | Built |
|---|---|---|---|---|---|
| Data4: Milan 1 DC1 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2014 |
| Data4: Milan 1 DC2 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2015 |
| Data4: Milan 1 DC3 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2016 |
| Data4: Milan 1 DC4 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2019 |
| Data4: Milan 1 DC5 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2021 |
| Data4: Milan 1 DC6 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2021 |
| Data4: Milan 1 DC10 | DATA4 Group |
Operational
|
░░░ Request Dataset MW | ░░░░░░ Request Dataset SqFt | 2022 |
| Data4: Milan 1 DC7 | DATA4 Group |
Operational
|
░░░░ Request Dataset MW | ░░░░░░░ Request Dataset SqFt | 2023 |
| Data4: Milan 1 DC9 | DATA4 Group |
Operational
|
░░░░ Request Dataset MW | ░░░░░░░ Request Dataset SqFt | 2024 |
| Data4: Milan 1 DC8.2 | DATA4 Group |
Operational
|
░░░░ Request Dataset MW | ░░░░░░░ Request Dataset SqFt | 2025 |
| Data4: Milan 1 DC11 | DATA4 Group |
Under Construction
|
— | — | 2026 |
| Data4: Milan 1 DC8.1 | DATA4 Group |
Under Construction
|
— | — | 2026 |
| Data4: Milan 1 DC15 | DATA4 Group |
Under Construction
|
— | — | 2027 |
| Data4: Milan 1 DC12 | DATA4 Group |
Planned
|
— | — | 2029 |
| Data4: Milan 1 DC14 | DATA4 Group |
Planned
|
— | — | 2029 |
Map and Nearby Locations
Data4: Milan 1 Campus Power Growth Over Time
Operating Company
Created in 2006 by Colony Capital, DATA4 is the European specialist in the construction and operation of ultra-secure data centers for French and international companies in the digital, manufacturing, service and banking and insurance sectors, who are seeking to outsource their data.
DATA4 manages flexible, high-performance and carrier- and cloud-neutral data centers, offering solutions from one colocation rack all the way through to purpose-built, dedicated facilities.
DATA4 Group operates data centers in France, Italy and Luxembourg, with a total net technical area of 22,000m² of IT rooms and more than 32 MW of IT power.
Company History:
2006: Creation of DATA4, joint venture between Alcatel, French telecommunications giant, and Colony Capital, international investment fund.
2007: The first client is hosted on the Paris campus
2009: The third building comes on line
2010: The fourth building comes on line
2011: The fifth building comes on line
2012: The sixth building comes on line and incorporates a high-density room.
2012: Acquisition of 3 data centers in Luxembourg, from Secure IT
2013: Creation of the Milan campus
2014: The first client from Milan is hosted
2015: A new executive committee is appointed to support the Group's growth targets.
2015: Second and third buildings in Milan comes on line
