Digital Realty MAD4 Madrid: 34MW Hyperscale Data Center
Status: Operational / Active Phased Capacity Expansion | Location: Calle de Alfonso Gómez 4, 28037 Madrid, Spain
Project Overview
Digital Realty’s MAD4 is a flagship hyperscale data center strategically located in Madrid’s San Blas-Canillejas technology district, widely recognised as "Silicon Alley Madrid." Spanning approximately 35,000 m² (380,000 sq ft), the facility delivers up to 34 MW of critical IT capacity, making it the largest and most advanced data center within Digital Realty’s Madrid metro campus. Purpose-built to support hyperscale cloud providers, enterprises, AI workloads, and high-performance computing (HPC), MAD4 offers highly scalable, energy-efficient infrastructure designed for mission-critical digital operations. The facility is interconnected through a resilient campus dark-fiber ring with the nearby MAD1, MAD2, and MAD3 data centers, enabling ultra-low-latency connectivity and seamless workload distribution across the Madrid campus. Serving as a strategic digital gateway between Southern Europe, Latin America, and North Africa, MAD4 provides carrier-neutral access to a rich ecosystem of telecommunications providers, internet service providers, cloud platforms, and enterprise networks. Customers benefit from direct connectivity to major internet exchanges, including ES-PANIX and DE-CIX Madrid, enabling high-performance interconnection and low-latency data exchange. The facility is engineered with a fully redundant 2N electrical architecture, advanced cooling systems, and comprehensive physical security measures to ensure maximum uptime and operational resilience. Powered entirely through 100% renewable energy procurement, MAD4 also supports customers' sustainability objectives while delivering reliable, secure, and future-ready infrastructure. Its strategic location, resilient design, extensive connectivity, and AI-ready capabilities make Digital Realty MAD4 one of Spain’s most important digital infrastructure assets and a key gateway for international data traffic.
Quick Facts
| Field | Value |
|---|
| Project Name | Digital Realty MAD4 Madrid: 34MW Hyperscale Data Center |
| Location | Calle de Alfonso Gómez 4, 28037 Madrid, Spain |
| Status | Operational / Active Phased Capacity Expansion |
| Commissioning | Phase 1 Launch: Q4 2022 / Active Phased Scaling: 2025–2027 |
| Total IT Load | 34 MW Total Critical IT Load |
| Total Capacity | ~40+ MW Total Gross Utility Substation Supply across 380,000 sq ft (35,000 m²) technical area |
| Tier Level | Tier III Equivalent / Concurrent Maintainability (ISO 14001, ISO 27001, ISO 50001 Certified) |
| Project Type | Purpose-Built Greenfield Hyperscale, Cloud & Interconnection Campus |
City Profile
| Header | Details |
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| City Name | Madrid |
| Population | 3.3Million |
| Urban Agglomeration | 7 Million |
| City GDP | €135.362 billion in 2020 |
| Per Capita Income | €38,435 per inhabitant in 2022. |
| City Tier | Tier 1 |
| Key Strengths | Strategic Subsea Cable Hub (connecting to the Americas and Africa); Central Location in Iberian Peninsula; Government Support for Digitalization. |
Companies Involved
| Header | Details |
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| Developer / Operator | Digital Realty |
| Strategic Infrastructure Partner | Iberdrola / Endesa (Electrical Utilities) & Community of Madrid |
| Construction Contractor | Specialized European Data Center EPC & Mission-Critical Contractors |
| MEP Engineering | Digital Realty Global Design & High-Density Thermal Engineering Teams |
| Network Connectivity | Redundant campus dark-fiber ring linking MAD1, MAD2, MAD3, and MAD4; direct access to ES-PANIX, DE-CIX Madrid, and major transatlantic/Mediterranean subsea landing routes. |
| Power Infrastructure | Dual dedicated utility grid feeds, static 2N uninterruptible power supply (UPS) topology, and N+1 emergency standby generators with a guaranteed 4-hour fuel supply commitment. |
Technical Specifications
| Header | Details |
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| Power Capacity | 34 MW Critical IT Power Capacity |
| UPS Redundancy | 2N Static UPS Architecture |
| Cooling System | Closed-loop chilled water cooling system with N+1 redundancy, air-side economization, hot/cold aisle containment, and liquid-to-chip cooling readiness for high-density AI clusters. |
| Connectivity | Carrier-neutral platform with dual Meet-Me-Rooms (MMRs), multi-path fiber entry points (POEs), and cloud cross-connects via ServiceFabric™. |
| PUE Target | < 1.25 Annualized Operational Design PUE |
| Energy Mix | 100% matched clean renewable energy procurement (wind and solar) supported by European Guarantees of Origin (GoO). |
Milestones
| Header | Details |
|---|
| Announcement | Q1 2021 |
| Construction Start | 2021 |
| Phase 1 Go-Live | Q4 2022 |
| Full Buildout | Operational / Phased Expansion 2025–2027 |
Investment Details
| Header | Details |
|---|
| Total Investment | Estimated €200,000,000 EUR to €300,000,000 EUR |
| Funding | Digital Realty corporate capital expenditure (CapEx) allocation |