Public opposition to data center construction is accelerating across Europe and Asia, creating investment risks that mirror growing pushback already affecting U.S. projects.

European regulators and local communities have blocked or delayed roughly $42 billion in data center investments, compared to $77 billion in the U.S., according to research from STL Partners. The European Data Center Monitor found that more than 70 projects were rejected or restricted between January and April alone, exceeding the total rejections for all of 2025.

Scotland paused new hyperscale data center approvals after local campaigns cited Ireland's moratorium triggered by overwhelming power demand. Denmark passed emergency legislation that could deprioritize data centers in grid power applications after a surge in power requests. Spain proposed rules requiring data centers to source 80% of electricity from renewables. Projects in the U.K. have stalled following local opposition.

Olivier Darmouni, associate professor at HEC Paris specializing in energy transition, told CNBC the backlash could prove decisive. "The gains of AI are very diffused," he said. Communities face concerns around water usage, power consumption, electricity costs and land requirements, with little clarity on permanent job creation or economic value per megawatt.

South Korea is experiencing similar friction despite national government backing for AI infrastructure as a priority investment alongside semiconductors. Residents in Seoul's Geumcheon district have protested for 172 days against a proposed data center near homes. In July, officials announced plans to require majority resident consent from those within 200 meters of proposed sites and introduced a three-stage dispute review process. Gwacheon's local council proposed an ordinance addressing overnight operations and backup battery fire risks.

Asya Walters, managing director at Alvarez & Marsal, noted that U.S. permitting has historically been more business-friendly, enabling operators to overcome local opposition. Europe and Asia present "hot and coldness" across countries, creating unpredictable regulatory environments that complicate investment decisions.

Costs rise even when projects are abandoned before construction begins. Operators spend substantially on planning and permits before capital expenditure accelerates, meaning denied permits create sunk losses.

Equinix's Eulalia Flo told CNBC the company does not view opposition as a structural constraint but acknowledged that "the policy environment is genuinely tightening in some markets." Verne CEO Dominic Ward attributed friction partly to visibility: "We used to be a completely unknown part of the economy. Now everybody knows where they are, so there's kind of no hiding behind this."