Milwaukee officials just put big data center builders on notice.
On Monday, the city's Zoning Code Technical Committee advanced a proposed rule that would sharply limit where and how new data centers can be built within city limits. The quick procedural vote moves the measure to the City Plan Commission for a deeper public airing, with supporters arguing it will bring more transparency and protect neighborhoods from noise and infrastructure strain, while developers warn it could make adaptive reuse projects a lot harder to pull off.
The committee agreed that the proposal meets its criteria to move up the chain during a brisk six-minute meeting, according to the Milwaukee Journal Sentinel. Members signaled they want a full public hearing and a broader planning-level review before recommending any zoning changes to the Common Council. The measure appeared on the agenda as a substitute ordinance specifically focused on data centers.
What the rule would do
The draft ordinance would carve out a brand-new "data center" land-use category and apply a three-tiered framework, according to Finance & Commerce. Facilities up to 20,000 square feet would be treated as a limited use in industrial-light and industrial-heavy zones. Projects between 20,000 and 60,000 square feet would be allowed only as a special use that needs Board of Zoning Appeals approval. Anything larger than 60,000 square feet would be outright prohibited.
Sponsors say those thresholds are designed to steer hyperscale, power-hungry campuses into appropriate industrial areas and to give nearby residents more chances to weigh in before a project lands in their backyard. The proposal would also spell out standards for parking and cooling systems tied to the new data center land use.
Extra review for mid-size projects
For mid-size facilities that fall into the special-use category, the ordinance would add another layer of scrutiny. Developers would have to submit a report from a Wisconsin-licensed professional engineer that projects annual and peak energy demand, analyzes expected noise impacts and describes community benefits, according to the Milwaukee Journal Sentinel.
Supporters say those technical studies would arm utilities and residents with clearer, comparable data when they are deciding whether to back or fight a proposal. Opponents counter that the added requirements could slow down redevelopment timelines and drive up costs, especially for projects trying to breathe new life into big, aging buildings.
Midtown Walmart redevelopment at center of debate
The political heat really turned up after developers floated a plan to reuse the long-vacant Walmart at 5825 W. Hope Ave. as a mixed-use property that would include up to 19,000 square feet of high-performance computing and research space, according to city filing City of Milwaukee Legistar.
The project's deviation narrative details server racks, data-storage systems, workstations, air handlers and backup generators for the computing area. Those specifics caught the attention of neighborhood groups, which argued that the potential impacts were serious enough to justify tighter rules and more extensive public review.
Local precedent
Milwaukee is not starting from zero. The city already hosts smaller commercial data centers, including a roughly 45,000-square-foot facility developed in 2012 by the Potawatomi Business Development Corporation at 3135 W. Highland Blvd., according to a Potawatomi release. Planners point to that earlier project as an example of both the economic upside and the heavy infrastructure footprint that modern data centers can bring, and as a reason they say the zoning code needs clearer, more tailored rules.
What's next
The committee's vote sends the ordinance to the City Plan Commission, which is slated to hold a public hearing on June 29, 2026, per the City Plan Commission schedule and public-hearing notice. Any final change would still need approval from the Common Council and the mayor before it could take effect.
Residents can dig into meeting documents and submit comments through the City Plan Commission website or sign up to testify at the hearing, the notice states. For now, Milwaukee's data center future will be hashed out in a very public forum.
