Loudoun votes Oct. 20 on a 12-month data center pause. What is on the table.

On Sept. 15, the Loudoun County Board of Supervisors voted 7-1-1 to draft a 12-month pause on new legislative data center applications. The formal resolution is expected on Oct. 20. It would be retroactive to Sept. 15, with exceptions for substations needed for grid reliability, and it would run while the county rewrites its data center standards, a job scheduled to finish in the summer of 2027.

What the pause does and does not do

The pause applies to new legislative applications, the rezonings and special exceptions that come to the board for a vote. It does not stop the projects already approved. Loudoun has 233 data centers operating and 116 in the pipeline, and on Oct. 6 the board tabled a proposed audit of 15 grandfathered projects covering about 10.5 million square feet, after county staff warned that trying to undo grandfathering could cost $45 million to $60 million in litigation and put the county's bond rating at risk.

By-right data center development, where a project needs no board vote at all, already ended in Loudoun in March 2025.

What is at stake for the budget

Data centers supply about $1.3 billion a year to Loudoun, roughly 40% of the county's General Fund in the fiscal 2027 budget. That revenue is why Loudoun's real estate rate is $0.805 per $100, the lowest in Northern Virginia, down from $1.145 in 2016, and why the average homeowner's bill rose $141 this year while Arlington's rose $466 and Fairfax's $337.

The county's own budget guidance says that revenue "will plateau in the next 5 to 10 years." The school division's first multi-year forecast shows shortfalls beginning in fiscal 2030 as data center growth slows, and county staff expect the growth to end around 2032. The Revenue Stabilization Fund the county built for that day is about $10 million short of its $130 million target and received no new money in fiscal 2027.

The questions worth asking

We do not ask anyone to trust every project. We ask that each one get a real evaluation. A pause is a procedural step, and the useful questions are about what the county writes during it.

• What will the new standards require? Clear, enforceable rules on water, cooling, noise, backup power and siting protect neighbors and give operators something definite to meet. Vague rules, or rules written to make projects impossible, do neither.
• What replaces the revenue as it plateaus? A county that depends on one industry for 40% of its budget needs the other parts of its base growing: homes, offices, industry, retail. A pause on one sector is only sound if the others are moving.
• What happens to the grid? During the July heat wave, Dominion said it was "minutes away" from putting every Ashburn data center on backup generators. The substations and lines that fix that still have to be approved somewhere.

The board meets at 1 Harrison St. SE in Leesburg. Agendas and public comment sign-up are on the county's website. If you plan to speak, tell us and we will send you the budget figures behind the decision.