St. Louis planning officials outline proposed data center rules as city weighs energy, zoning, transparency concerns

A fast-moving development trend meets a decades-old zoning code

St. Louis planning officials are moving to formalize how data centers are reviewed and where they may be allowed, after a surge of proposals exposed gaps in the city’s land-use framework. City planning leaders have warned that St. Louis lacks a clear zoning definition for data centers and has limited tools to evaluate their impacts on surrounding neighborhoods, infrastructure and long-term development goals.

The push for rules follows public scrutiny of large, power-intensive projects and an internal assessment that city staff have been forced to evaluate proposals without standardized disclosure, site standards or consistent public-hearing requirements.

From moratorium talk to a rulemaking timetable

In September 2025, city leaders debated whether to temporarily pause new data center proposals while staff developed regulations. Planning officials said St. Louis is not pursuing a permanent ban. Instead, the city moved toward a time-limited regulatory framework designed to gather standardized information from applicants and align data center review with updated zoning and water-related requirements.

The city also signaled that, going forward, data center proposals should receive public hearings through the conditional use process—an important procedural shift because some proposals previously could proceed without the kind of public vetting typically associated with major land-use decisions.

What the proposed rules aim to address

Planning officials have framed the policy goal as “responsible regulations” that allow data centers while limiting adverse impacts. Among the principal issues identified:

• Location and compatibility: establishing clear siting standards so large facilities are not placed in areas deemed incompatible with adjacent residential or mixed-use districts.

• Energy demand and grid impacts: requiring disclosures that allow the city and utilities to evaluate unusually large electricity needs tied to modern data centers.

• Water use and infrastructure: integrating review of water needs and related infrastructure constraints into permitting.

• Transparency and ongoing reporting: exploring updates to local energy-reporting tools so the public and policymakers can see large-facility consumption trends.

Benchmarking as a policy lever

St. Louis already has an energy and water benchmarking ordinance for large buildings, generally applying to properties 50,000 square feet and larger, with annual reporting requirements. Planning officials have discussed updating this system to ensure transparency for large data centers’ energy use—an approach that could give the city clearer, standardized comparisons across high-consumption properties.

Why the issue is escalating now

The debate is unfolding amid active proposals, including a high-profile Midtown concept tied to the former Armory site that has drawn attention from residents and elected officials. Supporters of stronger rules have pointed to the scale and intensity of modern data centers—facilities that can bring substantial construction activity but typically operate with comparatively limited permanent staffing.

City leaders have emphasized that the central question is not whether data centers are allowed, but how they are defined, reviewed and integrated into St. Louis’ long-term land-use and infrastructure plans.

For now, the city’s planning approach is shifting toward clearer definitions, standardized applicant disclosures and more consistent public process—steps intended to give officials and residents a more reliable basis for evaluating projects that can reshape utility demand and land-use patterns.