Seoul's Data Center Space Is Nearly Full, Pushing Growth to Rural Areas

Seoul has almost run out of room for the data centers that power artificial intelligence. According to recent industry analysis, the city’s vacancy rate stands at just 1.1 percent, making it the second-tightest market in the Asia-Pacific region. Only Johor Bahru in Malaysia is lower, reflecting a broader regional trend where digital infrastructure is outpacing physical space.

This scarcity is not just a local issue; it is reshaping where global companies build their digital foundations. With major infrastructure already concentrated in the capital, there is simply not enough room to accommodate large-scale new facilities. As a result, developers are looking beyond the city limits to find land that can support the heavy energy demands of modern AI workloads.

Power availability drives site selection

The primary factor driving this shift is not distance from the capital, but access to electricity. Industry experts note that global developers are now prioritizing 'powered land' over prime urban locations. If a site does not have immediate access to substantial power capacity, it must have a clear, timely plan for energization. This has made rural areas in provinces like Gangwon and cities like Busan and Ulsan viable options, provided they can meet these energy requirements.

This change reflects a broader trend in the industry. As power constraints intensify across the region, companies are willing to accept locations that are further from the urban core if they can secure stable energy supply and maintain acceptable network performance. The focus has shifted from proximity to the center to the reliability of the grid.

High costs balance high returns

Building in South Korea is expensive, with costs per megawatt ranking among the highest in the region outside of Singapore and Japan. However, this high entry price is offset by strong rental yields. Investors view the market as a lower-risk option that offers consistent long-term returns, rather than just a place to expand capacity as quickly as possible.

The combination of strong demand, low vacancy, and premium rents makes the country attractive for those who prefer renting space over building their own facilities. This is particularly true for large technology companies that face high costs and prefer the flexibility of leasing. The market’s maturity means that while the scale of expansion may be limited compared to countries like India or Australia, the quality of the revenue stream is considered stable.

National strategy targets 2035 goals

The Korean government is responding to this infrastructure gap with significant investment. The current administration has proposed major projects aimed at expanding AI data center capacity to 18.4 gigawatts by 2035. This plan involves spending over 1 quadrillion won to build out the necessary infrastructure, explicitly moving development away from the saturated capital region to other parts of the country.

This national push aligns with the private sector’s observations. By spreading out the build-out, the goal is to relieve pressure on Seoul’s grid and land availability while still meeting the growing demand for AI computing power. The catch, however, is that these new sites will require significant upfront investment in power infrastructure, a cost that must be factored into the long-term viability of the projects.