Loudoun grandfathering review turns the data center pipeline political

Loudoun County's board of supervisors voted Tuesday to ask its attorney whether it can reverse the grandfather clause shielding some data center applications from the new public-hearing rule and to count how many would be affected, Data Center Dynamics first reported. That review will measure how much certainty remains in applications that had not cleared the county when the old rules were removed. The clause was a bridge. By-right approval once let some data center projects through administrative review without a public hearing, and the new rules ended that route by requiring a board hearing and vote. Grandfathering eased the transition, letting applications filed before the removal keep the old standards as long as they sat more than 500 feet from residential units and were still being “diligently pursued.”

That clause gave developers with early filings something scarce: an administrative path in a jurisdiction that had just decided data centers would need public votes. Tuesday's motion by supervisors Juli Briskman and Laura TeKrony aimed to close even that path.

TeKrony argued that Loudoun should not have to “shoulder the burden of all the data centers in the world” and that residents deserved a voice in what is built next to their homes. Caleb Kershner answered with the county's revenue math, claiming data centers use one percent of the land while producing 50 percent of the revenue.

The two arguments count in different units: Kershner's are countywide and fiscal, TeKrony's local and experiential. The meeting ended with the board asking the county attorney how many applications qualify for grandfathering and whether reversal would be legal; no vote on the reversal itself will occur until that assessment comes back.

The legal analysis may be the slower of the two assignments, but the count carries the political weight. A small number of eligible applications would make the reversal largely symbolic, while a large number would put the board in the position of stripping an approval route from projects that relied on it, and every pending file would become an issue in the next campaign.

The Loudoun question is the siting question this publication has argued is the real bottleneck for data center construction: consent, not capital. Power and interconnection have become recognized constraints, but consent can be withdrawn. The grandfather clause was a promise that consent could be frozen at the filing date, and the board is now testing whether that promise was enforceable.

The motion drew attention, but the review is what changes the calculation: grandfathering only works if the clause is durable, and once a board votes to test that durability, an application points to a date on which the county may choose to change its mind as much as to any administrative process.

Kershner's one-percent argument can win the fiscal argument and still lose the zoning one, because a county can depend on data center revenue at the top of its balance sheet and still resist the next project at the street that receives it. The 500-foot eligibility line in the grandfather clause acknowledges that gap, which is why the count is likely to be as contested as the legality.

The count the county attorney returns is the number that will matter, because until it lands a crowded pipeline creates a new kind of asset risk: a grandfathering exemption the county has agreed to examine is no longer outside politics. In the data center business, that risk now has to sit somewhere in the underwriting.