STT Seoul 1: 30MW Gasan-dong AI-Ready Hyperscale Hub
Status: Active / Core Structural Completion & Final Technical Fit-Out (Tracking June 2026) | Location: 54 Gasan digital 2-ro, Geumcheon District, Seoul, South Korea
Project Overview
The STT Seoul 1 Data Center is a premier, high-density digital infrastructure asset finalizing execution in Gasan-dong, Geumcheon-gu, within the southwest industrial submarket of Seoul, South Korea. Engineered from the ground up to support the complex, data-heavy demands of large language model training and localized cloud infrastructure, the facility represents global operator ST Telemedia Global Data Centres' foundational entry into the competitive South Korean market. Advancing rapidly through final engineering validation, technical data hall fit-outs, and commercial operations staging in mid-2026, the facility addresses the acute grid scarcity impacting Seoul's urban core. In May 2026, STT Seoul 1 officially achieved the prestigious Uptime Institute Tier III Certification of Design Documents, validating its structurally resilient, concurrently maintainable architectural blueprint. By injecting 30 MW of net critical IT load directly into the Gasan-dong technology node, the data center gives enterprise clients and international hyperscalers access to scalable, hyper-dense compute clusters optimized to deliver ultra-low latency metropolitan interconnectivity.
Quick Facts
| Field | Value |
|---|
| Project Name | STT Seoul 1: 30MW Gasan-dong AI-Ready Hyperscale Hub |
| Location | 54 Gasan digital 2-ro, Geumcheon District, Seoul, South Korea |
| Status | Active / Core Structural Completion & Final Technical Fit-Out (Tracking June 2026) |
| Commissioning | Commercial operations and initial data hall live production launch targeted for June 2026 |
| Total IT Load | ~30.0 MW net critical operational compute capacity |
| Total Capacity | 45.0 Megawatts (45 MW) gross ultimate master-planned utility power envelope |
| Tier Level | Tier III Certified (Uptime Institute Certification of Design Documents achieved May 2026) |
| Project Type | Greenfield Multi-Story, High-Density Hyperscale & AI-Ready Urban Facility |
City Profile
| Header | Details |
|---|
| City Name | Seoul |
| Population | ~9.4 million (Seoul city proper) |
| Urban Agglomeration | ~26 million (Seoul Capital Area metropolitan region) |
| City GDP | ~US$400 billion |
| Per Capita Income | ~US$42,000–45,000 |
| City Tier | Tier 1 / Alpha Global City |
| Key Strengths | Global financial center, technology and innovation hub, headquarters of major conglomerates (Samsung, LG, Hyundai), advanced infrastructure, world-class public transportation, strong education and research institutions, vibrant culture and tourism sector |
Companies Involved
| Header | Details |
|---|
| Developer / Operator | ST Telemedia Global Data Centres |
| Strategic Infrastructure Partner | Geumcheon-gu Municipal Infrastructure Development Bureau |
| Construction Contractor | Leading South Korean Tier-1 Prime Mission-Critical General Contracting Firms |
| MEP Engineering | STT GDC Global Data Center Architectural Design & Engineering Platform |
| Network Connectivity | Carrier-neutral platform deploying dual physically isolated telecom entry points providing direct dark fiber paths to major local exchanges (KINX, KPN) |
| Power Infrastructure | Korea Electric Power Corporation (KEPCO) Grid Network (Dual 22.9kV utility power feeds deploying primary and secondary line isolation) |
Technical Specifications
| Header | Details |
|---|
| Power Capacity | 30 MW net critical operational IT capacity supported by highly specialized, high-amp distribution frameworks |
| UPS Redundancy | Distributed redundant solid-state static UPS systems paired with $N+1$ fast-starting emergency backup diesel generator arrays |
| Cooling System | High-efficiency closed-loop mechanical setup utilizing intelligent air-handling blocks engineered to adapt natively to direct-to-chip liquid cooling loops |
| Connectivity | Concrete-hardened subterranean network vaults providing total path routing diversity and redundant carrier transport pathways |
| PUE Target | $\le 1.30$ design-optimized annualized operating profile under continuous full-load simulation |
| Energy Mix | Energy-efficient architectural footprints incorporating smart water management and sustainable technical layouts designed to reduce resource utilization |
Milestones
| Header | Details |
|---|
| Announcement | 2023 - Q3 |
| Construction Start | 2024 - Q2 |
| Phase 1 Go-Live | 2026 - Q2 (Targeted June 2026 Commercial Launch) |
| Full Buildout | 2026 - Q4 |
Investment Details
| Header | Details |
|---|
| Total Investment | Multi-hundred million dollar long-term asset deployment under STT GDC’s strategic East Asian capital expansion program |
| Funding | Corporate equity backed by structured green financing frameworks, global syndicated credit lines, and local infrastructure investment tranches |