Dane County’s data center moratorium adds another local brake on hyperscale growth

Dane County has put another stopgap in place for large data centers. After the Dane County Board voted June 4, 2026, County Executive Melissa Agard signed an 18-month moratorium on hyperscale data center zoning permits in unincorporated areas under county zoning.

What the moratorium does

Dane County says the resolution prevents the county from receiving applications for, and granting zoning permits related to the placement or construction of hyperscale data centers for the next 18 months.

The county narrows the definition to facilities that use at least 5,000 servers and occupy at least 10,000 square feet of floor space—so smaller data center infrastructure is not covered.

Where it applies (and where it doesn’t)

This is a county-zoning action, not a city-of-Madison zoning decision. The moratorium applies to towns subject to county zoning, and it does not apply to cities, villages, or towns that have adopted their own zoning codes.

For residents and businesses in the Madison metro, that jurisdiction detail matters: permitting timelines can vary depending on whether a potential site is inside a self-zoned municipality versus an unincorporated town governed by Dane County.

Why the county is pausing

The county says it’s using the moratorium to study how a rapidly expanding category of development fits within Dane County’s land-use framework. The resolution directs that staff examine environmental, economic, health, and safety implications and develop zoning regulations aligned with the Dane County Comprehensive Plan.

Dane County also points to its Advisory Committee on Data Centers, which is conducting that work during the moratorium window.

Timeline: what Madison-area readers should watch next

While the resolution is for 18 months, local coverage describes the practical pause window as running through December 2027. That means applicants considering hyperscale sites in Dane County’s unincorporated, county-zoned areas should expect additional uncertainty while the county updates its next-step zoning approach.

The move lands in the middle of a broader Wisconsin pattern: other communities—including Madison—have passed their own data center moratoriums or permit restrictions as they weigh resource and infrastructure concerns. Dane County’s action is distinct, though, because it targets the county zoning process for unincorporated areas.

Sources

• Dane County press release: Board approves 18-month pause on hyperscale data center development
• Dane County Legistar: RES-039 (2026) final action / County Executive signature
• Isthmus: Reader-facing timeline and Madison-area context for Dane County’s moratorium
• Wisconsin Public Radio: Statewide context and links to Madison’s earlier moratorium