Mid-Atlantic data center permits just became the scarce asset

The Prince William County Board of County Supervisors voted unanimously to cut its Data Center Opportunity Zone Overlay District from 9,698 acres to roughly 3,641 and to require a special-use permit for anything proposed outside the smaller boundary. The county's planning documents call the change a fundamental shift in how Prince William approves data centers: proximity to a high-voltage transmission line no longer carries an entitlement with it.

A day later, Maryland Gov. Wes Moore announced an executive order creating a state review process for data centers of 25 megawatts or more whenever a developer seeks state permits, incentives or letters of support, along with a task force to weigh projects against their effects on ratepayers and the grid. Virginia Gov. Abigail Spanberger had moved first with last week's Data Center Accountability Framework and Executive Order 22, which directs state agencies to increase transparency, environmental oversight and scrutiny of the industry; her administration is separately proposing legislation for the 2027 session. For a sponsor with a Mid-Atlantic pipeline, the order of operations that governs a project has been rearranged, and site control in the region's most concentrated market no longer implies a path to approval.

Prince William created the overlay in 2016 to steer data center development toward land near high-voltage transmission lines, and the strategy worked well enough to make the county one of the country's largest data center markets, according to Commercial Observer. The amendment leaves roughly 38 percent of that footprint: a little over 3,600 acres where a sponsor can still underwrite a schedule, and about 6,000 acres where construction now depends on a discretionary vote. Nothing about the power, the fiber or the tenant demand changed in the past two weeks. What changed is that the county has stopped enlarging the supply of entitled land, which fixes the buildable footprint at a number the board chose.

The boundary now does the work that power lines used to do on a Prince William site map: it turns acreage just outside it into something closer to a political option than a development site. Land inside the overlay should trade at a widening premium that has little to do with distance to transmission or dirt quality and a lot to do with the cost of a special-use permit and the time that consumes, and every acre removed from the entitlement map raises the barrier to the next competing campus. For owners of operating data centers in Prince William and Loudoun, that is the favorable side of the trade, assuming demand holds and Loudoun's special-exception process does not become the substitute path the county just narrowed.

Both states settle on 25 megawatts as the line separating a routine project from a scrutinized one. Maryland's review applies at 25 megawatts or more and conditions state advocacy and certain incentives on a project aligning with the new framework, although Moore said local officials will still decide whether projects move forward and projects that fall out of step can face deferred state review. Virginia's proposed legislation would end by-right approval above 25 megawatts, require local sign-off, pull future large projects out of the state's fast-track permitting process and end state subsidies, and Spanberger framed the framework as a withdrawal of the latitude the industry has held in the state.

The threshold matters as much below the line as above it. Under Virginia's proposal as written, projects at or under 25 megawatts would keep by-right treatment, suggesting the next round of site plans gets sized to the rule rather than to the parcel and that a sponsor weighing one large campus has reason to look at phased capacity instead—a land-assembly question with a zoning answer that counsel and civil engineers will settle long before it reaches a lender's term sheet.

Maryland's version carries a cost the review process does not. Moore said his administration will seek to repeal the state's 2020 sales and use tax exemption, though he did not say what that exemption has been worth to developers. A repeal would remove a cost input Maryland has offered since 2020 while an additional review layer sits above the approval path—a harder package to underwrite than Virginia's, where the constraint so far runs through land rather than tax treatment. Maryland's market is not at Virginia's scale, and its politics have moved faster: about half its counties have adopted temporary moratoriums, according to Moore's order, and Harford County banned new data centers outright in June.

Virginia's two anchor counties are converting fixed entitlements into discretionary ones in the same season. Loudoun County, home to more than 250 data centers, has moved future projects to a special-exception process and is considering additional permitting and zoning changes, so the jurisdiction with the deepest concentration of capacity in the state now approves capacity by vote where it once approved it by filing.

For a construction lender, the difference between a county moratorium and a special-use process is one of degree. Both replace a schedule with a vote, and debt prices a vote through wider contingency, longer interest carry and a harder conversation about pre-leasing covenants. Maryland's deferred-review rule sharpens the point: a project that does not line up with the framework forfeits state advocacy and certain incentives, which strips a sponsor of documents that show up in a loan file.

As this publication has argued, data-center-linked pricing is a rents-and-scarcity trade in which the operator, the land basis and the data-center pull set the clearing price. The past week adds a variable that sits above the other three, because the scarcity is now administered: Prince William can redraw its overlay, Loudoun can widen its special-exception process and Maryland can condition its incentives on a task force's reading of grid cost, which puts the clearing price for Mid-Atlantic data center land on county calendars and legislative sessions rather than on interconnection queues and makes the underwriting question less about power than about who sits on the board. Virginia's by-right elimination is still proposed for the 2027 session and Maryland's tax repeal has not been enacted, so for now the 3,641 acres inside Prince William's overlay remain the ground a sponsor can underwrite on a schedule.