Board of Supervisors Approves New Data Center Zoning Ordinance Amendment

On Sept. 10, the Board of Supervisors approved a data center zoning ordinance amendment to strengthen regulations and address concerns about noise, building design, and proximity to residential areas. The goal was to better manage the location and operation of these facilities as demand for data centers increases.

Key Changes

The previous zoning ordinance permitted data centers in various commercial and industrial districts, with specific standards for equipment enclosure and building size. However, the newly approved amendment introduces stricter guidelines, including:

• Equipment Enclosure: In all districts where data centers are allowed, all equipment must be enclosed or screened by a wall or similar barrier to reduce visual and noise impacts.
• Size Thresholds: Limits on the size of by-right data centers are retained where they previously applied and now the I-4 District has a size limit as well. Larger developments require special exception approval, except in the I-5 and I-6 Zoning Districts
• Residential Setback: Data center buildings must be at least 200 feet from the lot line of an adjacent or abutting residential district or property. Equipment such as back-up generators must be 300 feet from the lot line of residential property or separated from the lot line of a residential district or residential property by the data center building. Lesser distances may be allowed with special exception approval.
• Distance from Metro Stations: Data centers must be at least one mile from a Metro station.
• Noise Studies: Pre- and post-construction noise studies must be submitted to ensure compliance with the Noise Ordinance.
• Building Design: Main entrance features, façade variations, and other architectural elements are required to enhance the visual appeal of these industrial buildings.

Community Engagement and Feedback

The changes follow extensive community engagement efforts. In March, the Board of Supervisors authorized the preparation of the zoning ordinance amendment, then the county held virtual community meetings in May, at which residents provided feedback on the draft amendment. Their input helped shape the final recommendations presented to the Planning Commission and the Board of Supervisors.