Update

Seattle Halts New Data Center Development for One Year Amidst Power Concerns

The Seattle City Council has approved a one-year moratorium on new data center construction, responding to concerns raised by the city's power company about the significant energy demands of several proposed projects that could consume over a third of the city's current power capacity.

Update Published 15 June 2026 3 min read Clara Whitfield

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Seattle’s City Council has enacted a one-year moratorium on the development of new data centers, a move driven by significant concerns over the strain these facilities place on the city’s power grid. The decision came after the city’s primary power provider identified five proposed data center projects that, if approved, would collectively demand approximately 369 megawatts of power. This demand represents a substantial portion of Seattle’s total power capacity, estimated at around 1 gigawatt.

The moratorium specifically pauses the development of data centers exceeding approximately 20 megawatts for an initial period of one year. This duration allows the city ample time to conduct crucial assessments and potentially extend the pause for an additional six months if deemed necessary.

Por que importa

In parallel to the development freeze, a separate ordinance has been passed, directing city staff to undertake a comprehensive study of the multifaceted impacts of data centers. This study will delve into the potential effects on power consumption, water resources, land use patterns, local employment, and public health within the city. The findings from this research are expected to inform future policy decisions regarding data center development in Seattle.

Key facts

Aspect	Detail
Action	One-year moratorium on new data center development
Trigger	Concerns over power demand from proposed projects
Power Impact	Five proposed projects would require ~369 MW out of ~1 GW total capacity
Scope	Pauses development of data centers > ~20 MW
Additional Measures	Mandated study on data center impacts (power, water, land use, employment, health)
Geography	Seattle, Washington

The rapid growth of data centers globally presents a growing challenge for urban planners and utility providers. These facilities are notoriously energy-intensive, requiring substantial and continuous power supply for operations and cooling systems. As demand for digital services escalates, so does the need for data center infrastructure, often leading to a critical examination of their environmental footprint and resource demands.

Contexto

This moratorium in Seattle highlights a broader trend where cities are beginning to grapple with the implications of large-scale industrial energy users within urban environments. The city’s approach suggests a desire to balance technological advancement and economic development with the imperative of maintaining reliable and sustainable energy infrastructure, as well as considering the wider impacts on the urban fabric. The outcome of the mandated study will be pivotal in shaping Seattle’s future policy on data centers, potentially influencing how other cities approach similar challenges.

Source: Planetizen News – Seattle bans data centers for a year (https://www.planetizen.com/news/2026/06/137799-seattle-bans-data-centers-year)