# Corsico, Milan: a steelmaker’s warehouses turned into a 13.6 MW data center

> Steel group Marcegaglia sold an industrial complex in Corsico, on Milan’s western ring road, to telecom operator Retelit (announced September 2025). The site had two warehouses of about 11,500 m², offices and a yard, with **high-capacity electrical and data connections** already in place. Retelit broke ground in 2026 on a **13.6 MW** data center in two buildings, with first capacity targeted for 2027.

Third-party precedent · Italy · Under construction · Pathway: Brownfield redevelopment, then build and operate · Last checked 2026-10-13 · https://ampervia.com/case-studies/corsico-milan-brownfield/

## Timeline

| When | What happened |
|---|---|
| Before 2025 | Part of a Marcegaglia steel site: two warehouses (~11,500 m²), ~600 m² offices, ~6,000 m² yard. |
| Sep 2025 | Sale to Retelit announced (price not disclosed). |
| 2026 | Construction starts: two buildings, 13.6 MW total. |
| 2027 | First capacity targeted. |

## What changed between entry and exit

- Chose an existing industrial site with power and fibre close to Milan.
- The operator bought and builds itself: no intermediate developer.

## Capital and counterparties

Retelit funds land and build within a €350m three-year investment plan.

## Economics

| Item | Figure | Note |
|---|---|---|
| Purchase price | Not disclosed |  |
| Capacity | 13.6 MW | Two buildings |
| Operator investment plan | €350m over three years | Group-wide, not this site alone |

## Risks and limitations

- No price disclosed.
- Lombardy has very large connection queues (44.96 GW of data center requests); an existing connection shortens the path.

## Relevance to Ampervia

In Milan, existing industrial connections close to the city are what operators buy. Lombardy’s new law also rewards brownfield sites with lower construction charges.

## Sources

- [Pambianco Real Estate — Marcegaglia sells Corsico industrial site to Retelit (Sep 2025)](https://realestate.pambianconews.com/2025/09/08/marcegaglia-vende-a-retelit-un-sito-industriale-a-corsico-milano/)
- [World Capital — advisor on the Corsico sale](https://www.worldcapital.it/wcg-deal-data-center-corsico/)
- [Retelit — groundbreaking of the Milan Corsico data centre (2026)](https://www.retelit.it/en/press/press-releases/2026/retelit-breaks-ground-on-a-new-ai-ready-sustainable-data-centre-in-milan-corsico)
- [Key4biz — la Lombardia chiede alla rete 44,96 GW](https://www.key4biz.it/data-center-la-lombardia-chiede-alla-rete-4496-gw/586919/)