Seattle Bans New AI Datacenters for One Year

Seattle's city council has unanimously approved a one-year moratorium on new datacenter construction, making it the largest U.S. city to impose such restrictions as communities nationwide push back against AI infrastructure's energy demands.

The temporary ban, passed Tuesday, comes after proposals for five new datacenters revealed they could consume up to one-third of Seattle's current electricity demand, according to reporting by the Seattle Times in April. That disclosure prompted swift action from lawmakers in a metro area that serves as headquarters for both Amazon and Microsoft.

A pause to write the rules

Mayor Katie Wilson framed the moratorium as a window for city officials to develop targeted regulations for electricity-intensive AI datacenters and assess whether they represent appropriate urban land use. The pause may also enable the city to require developers to fund local transit and housing projects as a condition of approval.

"There are times when public pressure forces elected officials to do something they don't want to do, but in other cases, public pressure just supports and helps to spur on elected officials to do things that they already want to do," Wilson said. "I think this was one of those latter cases."

Local tech workers played a central role in the campaign. Groups including Amazon Employees for Climate Justice organized meetings with policymakers and coordinated a letter-writing effort that generated nearly 100,000 emails to city officials. Ben Jones, a spokesperson for climate group 350 Seattle, said many tech workers opposed the datacenters because AI has become "synonymous with people losing their jobs" — a reference to the thousands of layoffs at Amazon and Microsoft over the past year even as the companies invest a projected $390 billion in AI in 2026.

An exception that may undermine the pause

Lawmakers included a unanimous amendment allowing existing Seattle datacenters to request expansions of up to 20 megawatts during the moratorium. Officials justified the carve-out as a way to distinguish facilities serving civic functions — such as those supporting health systems and emergency services — from large-scale AI infrastructure.

Activists worry the provision could trigger a surge in power demand during the pause period, potentially defeating its purpose.

Why it matters

Seattle's moratorium reflects growing tension between AI ambitions and local infrastructure limits. As companies race to build computational capacity for generative AI, municipalities are discovering that datacenter power requirements can strain electrical grids and drive up costs for residents. The Seattle model — a temporary ban paired with regulatory development — may offer a template for other cities navigating similar pressures. Wilson said her administration plans to advocate for state-level datacenter regulation during Washington's next legislative session.

Activists in Seattle are now supporting similar campaigns in Spokane, the state's second-largest city, and in Walla Walla in southeastern Washington.

These details were first reported by The Guardian.