Louisville Bans Co-Located Power Plants at Data Centers?

Louisville Metro’s Office of Planning has proposed a sweeping data center zoning framework that carries direct consequences for energy infrastructure strategy

Alert Level

Active monitoring now, with preparation warranted this quarter. Louisville’s proposal is not yet enacted law, but it passed through a 30-day public comment period drawing more than 3,600 submissions and was subsequently tightened — not loosened — in response. That trajectory suggests the regulatory direction is hardening, not softening.

What Is Changing

Louisville Metro’s Office of Planning has proposed a sweeping data center zoning framework that carries direct consequences for energy infrastructure strategy. The proposal, updated in July 2026 after a formal public comment process, introduces the following requirements.

Hyperscale data centers exceeding 500,000 square feet are banned outright. Large-scale facilities that remain permissible must be located at least 500 feet from sensitive uses including residences, hospitals, nursing homes, childcare centers, and schools. Smaller facilities in the 50,000-to-250,000-square-foot range face a 200-foot setback requirement. All future data center development is confined to industrial zones.

On the energy side, the rules go further than most municipal frameworks. Gas turbines and co-located power plants are explicitly excluded from data center uses. Generator testing is capped at once per week, restricted to the window between 8 a.m. and 5 p.m., and generators are permitted for regular operation only during declared emergencies. A separate provision targets accessory data centers, capping them at the lesser of 25,000 square feet or 49.9% of a building’s total floor area.

The proposal also requires developers to bear the full cost of any utility infrastructure upgrades their facilities necessitate, and mandates that new facilities demonstrate they will not shift costs onto existing ratepayers.

Who Is Most Exposed

Operators with active site selection or development pipelines in the Louisville metro region feel this most immediately. Any facility design that assumed behind-the-meter gas generation — whether as primary power or as load-management capacity — must be re-evaluated from the ground up under this framework.

The co-location prohibition directly targets a strategy that has gained traction industry-wide as a hedge against grid interconnection delays. Developers packaging on-site gas turbines into their resiliency stack, or exploring co-location with dedicated generation assets to sidestep queue timelines, will find Louisville explicitly forecloses that path.

The generator-use rules create a separate operational constraint. A facility relying on diesel or gas gensets for routine load-following or demand-response participation — rather than strictly emergency backup — would be structurally non-compliant under the proposed restrictions. The weekly testing cap also narrows the maintenance window and elevates compliance risk for how backup capacity is sized.

Colocation providers scouting Louisville for multi-tenant campuses face the 500,000-square-foot ceiling: that scale is modest by hyperscale standards, and operators planning phased expansion to hyperscale density would need to model alternative geographies.

What Happens If You Do Not Act

The immediate consequence of inaction is misaligned capital. A development project underway in Louisville that incorporates co-located generation will need to either strip that infrastructure or relocate — neither path is low-cost. At the permitting stage, a facility design that conflicts with the setback requirements or generation prohibitions will not clear conditional use review.

Beyond Louisville, the exposure is reputational and precedent-setting. This proposal emerged directly from a community organizing campaign and was strengthened in response to public pressure. If that dynamic replicates in other mid-sized markets — and there is no structural reason it would not — operators that have not mapped their generation co-location strategy against municipal zoning risk will find themselves re-engineering site packages late in the development cycle.

The cost-shift provision warrants particular attention. If regulators in other jurisdictions adopt Louisville’s requirement that developers certify against ratepayer cost transfer, it introduces a new due-diligence layer into utility interconnection negotiations — a material change to how developers and operators engage with utilities during site selection.

3-Step Action Path

This week: Confirm whether any active Louisville-area site selections or lease negotiations involve facilities above 250,000 square feet, and whether any energy design packages incorporate on-site generation beyond standard emergency backup. Flag those files for legal and permitting review before the proposal advances to a vote.

This month: Request a legal assessment of the proposal’s current draft language — specifically the co-located power plant exclusion and the generator operating rules — in terms of how those definitions interact with your standard facility specifications. If behind-the-meter generation is embedded in your resiliency model for any mid-South markets, initiate a zoning-risk review across that geography before committing further capital.

This quarter: Brief your site selection team on the community-organized regulatory pattern this proposal represents. The 3,600-comment mobilization that tightened Louisville’s rules is a replicable playbook. Add municipal zoning risk — including generation co-location restrictions — to your site-scoring criteria for any market where residential or hospital adjacency is possible, not just Louisville.

What Is Still Unclear

The proposal is a recommendation from the Office of Planning, not an enacted ordinance. The timeline for a formal vote, the probability of additional amendments, and whether the current hyperscale size ceiling could shift during the legislative process are not established by available reporting.

The practical definition of “co-located power plant” in enforcement terms is also not yet confirmed. Whether that language would capture fuel cells, stationary battery systems with integrated inverters, or small modular generation assets remains an open interpretive question. Operators should not assume the current language is final or that their specific infrastructure configurations fall clearly inside or outside the prohibition until final text and implementing guidance are published.