Louisville Data Center Zoning Analysis

Background: Data centers currently have no dedicated use category in Louisville’s LDC — they’ve been approved as telecommunication hotels, a catch-all with no size limits, no public process, and no environmental standards. Metro Council passed Resolution 82 (September 2025) directing Planning staff to develop dedicated regulations. The result is a tiered, size-based framework that introduces setback, noise, utility, transparency, and workforce requirements that didn’t previously exist.

Side-by-Side: Current Code (Telecom Hotels) vs. Proposed Regulations (Data Centers)

Topic	Current Code	Proposed Code
Use Classification	No "data center" category. Facilities reviewed as Telecommunication Hotels — no formal definition, no size distinction.	NEW Dedicated definitions: Data Center, Accessory Data Center, Telecommunication Data Center, and Data Center White Space.
Where Permitted	By right in C-3, M-1, M-2, M-3, C-M, EZ-1, PRO, PEC — all sizes, no restrictions.	RESTRICTED Tiered by size. Large (250k–500k sq ft): M-3 only. Medium (50k–250k): EZ-1, M-2, M-3, PEC. Small (≤50k): C-M, EZ-1, M-1, M-2, M-3, PEC, PRO.
Size Cap	None. Any scale permitted.	NEW Hard cap of 500,000 sq ft. Hyperscale facilities prohibited in all districts.
Permit Type	By right — no public hearing, no review process.	RESTRICTED Small: by right with special standards + registration. Medium: standards or CUP. Large (250k–500k): CUP required with public hearing. Over 500k: prohibited.
Form District Overlay	No form district requirement.	NEW Must be in Campus, Regional Center, Suburban Workplace, or Traditional Workplace Form Districts (non-waivable).
Residential Setback	Standard district minimums only.	NEW Small: +25 ft. Medium: +100 ft. Large CUP: +200 ft — all in addition to standard setbacks.
Separation from Sensitive Uses	None. No separation from homes, schools, hospitals, or daycares.	NEW Small: 25 ft. Medium: 200 ft. Large CUP: 500 ft from dwellings, schools, childcare, nursing homes, hospitals, shelters.
Noise Standards	General LDC noise provisions only.	NEW Max 65 dBA at property boundary. Generator testing: once/week max, 8 AM–5 PM only, emergency use only.
Generator Fuel Type	No restrictions on fuel type, testing, or operations.	RESTRICTED Propane, natural gas, hydrogen, bi-fuel, battery (ESS), or EPA Tier IV diesel only. No gas turbines or co-located power plants. Emergency use only.
Utility / Grid Impact	No utility analysis required.	NEW Transmission study with LG&E required before development. Will Serve Letters from Louisville Water and MSD. Developer pays for required infrastructure upgrades.
Water / Cooling	No requirements.	NEW Closed-loop cooling encouraged. No private wells (except geothermal). Must connect to public sewer. Reclaimed water encouraged.
Environmental Site Design	Standard LDC development standards only.	NEW Must avoid slopes >15%, preserve 40% tree canopy, maintain ≥20% vegetated open space, LED lighting, passive cooling, no development in environmental constraint areas.
Ownership Transparency	No disclosure required.	NEW Full ownership disclosure + primary user/operator disclosure required — public record at application.
Workforce / Wages	No requirements.	NEW 30% of construction hours must be Louisville Metro residents (good faith). Prevailing wage required where permitted by law.
Accessory Data Centers	Any zone under general accessory standards. No size cap.	RESTRICTED Capped at lesser of 25,000 sq ft or 49.9% of principal use floor area. No colocation. Loophole closed.
Registration / Tracking	No mechanism. Metro does not track locations (~23 known, only 13 active).	NEW All facilities must register with the Office of Planning before development or operation. Director can deny for non-compliance.

Proposed Size-Tier Framework

Accessory Data Center

≤ 25,000 sq ft or ≤ 49.9% of principal use

Districts: Any zone (tied to principal use; no colocation)

By Right w/ Standards

Small Data Center

≤ 50,000 sq ft

Districts: C-M, EZ-1, M-1, M-2, M-3, PEC, PRO
25 ft separation from sensitive uses

Special Standards + Registration

Medium Data Center

50,001 – 250,000 sq ft

Districts: EZ-1, M-2, M-3, PEC only
200 ft separation from sensitive uses

Special Standards or CUP

Large Data Center

250,001 – 500,000 sq ft

Districts: M-3 only
500 ft separation from sensitive uses

CUP Required (Public Hearing)

Hyperscale

> 500,000 sq ft

All districts

Prohibited Outright

Telecom Data Center

≤ 250,000 sq ft (FCC-regulated only)

≤50k: C-3, C-M, EZ-1, M-1, M-2, M-3, PEC, PRO + downtown/urban forms
50k–250k: EZ-1, M-2, M-3, PEC

Special Standards (no CUP)

Key Equity Note: The only zones eligible for large data centers (250k–500k sq ft CUP) are M-3 districts — concentrated in West Louisville (Rubbertown/Portland corridor, Cane Run, Riverport). These are the same communities bearing the greatest existing environmental burden in Louisville. The 500 ft sensitive-use separation requirement is a critical protection, but given the density of residential areas and schools in those neighborhoods, even that buffer will face real-world constraints. The registration and public hearing requirements are new tools for community oversight that did not exist under the old telecom hotel framework.