Dane County’s 18-month data center zoning moratorium: what it could mean for Mount Horeb
Mount Horeb WI – Dane County adopted an 18-month hyperscale data center zoning-permit moratorium. Here’s how to tell if it affects village limits.
Dane County has adopted an 18-month pause on receiving zoning-permit applications for certain large (“hyperscale”) data centers. For residents and business owners in Mount Horeb, the key question isn’t just whether a project is in Dane County—it’s where the proposed site is located and which zoning authority applies.
What Dane County adopted (and when)
Dane County Resolution 2026 RES-039 was adopted by the County Board on June 4, 2026 and signed by the County Executive on June 8, 2026. The county said the moratorium is meant to give its Advisory Committee on Data Centers time to finish research and help inform possible policy changes.
What the moratorium actually does
In plain terms, the county action creates a moratorium on the receipt of applications for—and the granting of zoning-related permits—for the placement or construction of hyperscale data centers in Dane County.
That’s narrower than a broad “development moratorium.” The resolution text says it is not intended to be, and does not constitute, a Wisconsin “development moratorium.” It’s focused on zoning-permit issuance tied to this specific type of data center.
The definition Mount Horeb residents should use: “hyperscale”
The resolution defines a hyperscale data center as a data center that uses at least 5,000 servers and includes at least 10,000 square feet of floor space.
So, if you hear “a data center” discussed locally, residents and businesses should get specific about whether the project meets those thresholds.
Who is covered—and who is not
Dane County’s own materials say the moratorium is designed to apply to towns subject to county zoning. It does not apply to cities, villages, or towns that have adopted their own zoning codes.
That matters in Mount Horeb because Mount Horeb has its own adopted zoning ordinance.
So does it affect Mount Horeb? Location determines the zoning authority
Mount Horeb’s zoning code (Chapter 17) states that the chapter is applicable to territory within the corporate limits of the Village of Mount Horeb. It also defines “extraterritorial zoning” as the area outside village limits where the village has exercised extraterritorial zoning powers.
Putting those two pieces together:
- If a hyperscale data center proposal is inside Mount Horeb village limits, the village’s zoning authority is the governing framework for local zoning review.
- If a hyperscale proposal is outside village limits, the next question becomes whether the site is in a Dane County town under county zoning (a situation where the county moratorium may limit zoning-permit issuance) versus in an area where Mount Horeb’s zoning authority applies.
What to watch next: the “18-month clock” may not start on June 8
The resolution text says the moratorium is in effect for 18 months from the ordinance’s effective date (with the county clerk to insert that effective date) or until it is rescinded, whichever comes earlier. That means residents should not assume June 8, 2026 is automatically the start of the 18-month period.
If more hyperscale data-center proposals are discussed around Mount Horeb, the practical checklist is straightforward: Does it meet the 5,000-server / 10,000-square-foot hyperscale definition? And is the site within Mount Horeb’s village zoning jurisdiction or in a Dane County town under county zoning?
Sources
- Dane County press release: “Dane County Board Introduces Moratorium on Data Center Development” (includes applicability language)
- Dane County Legistar page: 2026 RES-039 (resolution status + final action/signing dates)
- Village of Mount Horeb zoning code, Chapter 17 (adopted; applicability inside village limits)
- League of Wisconsin Municipalities: Mount Horeb Village Administrator position profile (place context)
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