Data Centers and Zoning in Loudoun County, Virginia

How Loudoun became 'Data Center Alley'

Loudoun County sits next to Washington Dulles International Airport and the dense fiber-optic infrastructure that grew up around it, a combination that made the county the natural landing spot for the internet's physical backbone starting in the 1990s. That early advantage compounded for decades: as of 2026, Loudoun is documented as home to the largest concentration of data centers in the world, with roughly 250 facilities sited across the county totaling more than 53.3 million square feet of building space -- an industrial buildout on a scale unmatched anywhere else, more than 900 football fields' worth of server floor, generating a substantial share of the county's tax revenue but also consuming large tracts of land, drawing enormous amounts of electricity, and generating sustained resident concern about noise, water use, viewsheds, and the pace of industrial-scale construction encroaching on residential and rural areas.

The 2025 zoning change: no more by-right data centers

That pressure produced a genuine, documented change to Loudoun's zoning ordinance. On March 18, 2025, the Board of Supervisors approved a Comprehensive Plan Amendment (CPAM) and a Zoning Ordinance Amendment (ZOAM) that eliminated by-right development of data centers everywhere in the county. Before this change, a data center meeting the applicable district's use standards could be approved administratively, without a public hearing. After it, a proposed data center anywhere in Loudoun County must instead obtain a special exception -- a legislative approval process that requires Planning Commission and Board of Supervisors review and public hearings, giving neighbors and the public a formal opportunity to weigh in on a specific project before it can proceed.

That is a meaningful practical difference for anyone with a stake in nearby land. A special exception process takes materially longer than an administrative by-right approval, and it puts each individual data center project through a public hearing where traffic, noise, visual impact, and utility infrastructure can all be contested case by case, rather than being resolved once at the ordinance-drafting stage. If you own or are buying land adjacent to a district where data centers are a permitted special-exception use, expect any future data center proposal nearby to come with real advance notice and a real public process -- which cuts both ways depending on whether you want that kind of development near your land or want to help stop it.

July 2026: a major campus rejected on the merits

The special exception process has already produced a real, concrete result. On July 23, 2026, Loudoun's Planning Commission voted unanimously to recommend denial of Active Infrastructure's proposed Spring Valley Technology Park -- a roughly 325-acre campus near Beaverdam Reservoir (reported at somewhere between 3.25 and 3.54 million square feet, with roughly 780 megawatts of capacity), which would have required rezoning from Transitional Residential to Industrial Park for ten data center buildings, three substations, and backup power storage. More than 500 residents turned out to the hearing, almost entirely in opposition, citing the clearing of woodlands and wetlands and the creation of an industrial barrier between Beaverdam Reservoir and the Banshee Reeks Nature Preserve. That is direct, current proof that the special exception process installed in 2025 is a genuine gate, not a formality -- a large, capital-intensive project can now be stopped at the public-hearing stage.

September 2026: a moratorium vote pending, not yet decided

The underlying tension has not settled. In a vote on or around September 9-10, 2026, the Board of Supervisors voted 6-1 -- Leesburg District Supervisor Kristen Umstattd dissenting -- to direct county staff to prepare, for the Board's September 15, 2026 meeting, a temporary moratorium on new data center applications, site plans, and substation permits, to remain in place until the county finishes overhauling its data center zoning standards. As of this page's last-reviewed date, that September 15 vote had not yet occurred -- this page's snapshot is of a directive to prepare a proposal, not an enacted moratorium, and you should confirm its outcome directly with the county rather than assume either way. The county's own attorney has cautioned that a blanket moratorium may not hold up under Virginia law, which generally requires each rezoning or special-exception application to be considered on its individual merits rather than paused as a class -- meaning even if the Board approves a moratorium on September 15, its legal durability is itself an open question.

Separately, the county's Western Loudoun Rural Uses and Standards Ad Hoc Committee -- nine members split between the Planning Commission and the Zoning Ordinance Committee -- was established by the Board on June 2, 2026, held its first orientation meeting on August 11, 2026, and is scheduled to finish its work and dissolve by the end of November 2026. Its job is to review draft amendment language aimed at protecting the county's rural western half -- its hunt country, wineries, and conservation-easement-protected farmland -- from further industrial encroachment, before that language goes to the Planning Commission. A separate, related process specifically labeled "Data Center Standards and Locations" (the county's Phase 2 zoning work) ran research and drafting from October 2025 through April 2026, then public engagement from April through June 2026; confirm its current post-engagement status directly, since this page's research pass could not independently verify what has happened with it since June 2026. If your land sits anywhere near the boundary between eastern Loudoun's built-out data center corridors and the rural west, both of these processes are worth tracking directly with the Department of Planning and Zoning as they finalize.

What this means for a land buyer, either direction

If you're evaluating land specifically because of its proximity to Data Center Alley -- as an investment banking on continued industrial demand, or a commercial site with data-center-adjacent utility access -- understand that any new data center project on or near your land will now go through the special exception process rather than an administrative approval, which affects both your own development timeline if you plan to build one, and your ability to have a say if a neighboring parcel proposes one.

If instead you're specifically trying to buy rural land in western Loudoun and want assurance it stays that way, the combination of the special exception requirement, the county's substantial conservation-easement program (over 85,000 protected acres countywide), and the dedicated Western Loudoun Rural Uses Standards process together form a real, multi-layered set of protections -- but none of them is an absolute guarantee, and all are worth confirming as currently in force, rather than assumed, for any specific parcel you're considering.