The Mechanics of Federal 'National Security Zoning': How CFIUS is Redrawing the US Real Estate Map

The federal government has quietly become America's most powerful, least visible zoning board. Through a series of methodical expansions to the Committee on Foreign Investment in the United States (CFIUS), the Treasury Department has claimed the authority to review, block, or unwind real estate transactions across millions of acres of US soil. If a foreign entity wants to buy land near a designated military installation, local municipal approval no longer matters; Washington has the final say. This represents a profound, structural shift in how land use is governed in the United States, moving authority from the county courthouse to the Pentagon.[3]

Historically, CFIUS focused almost exclusively on corporate mergers and acquisitions. Its mandate was to stop foreign adversaries from buying US defense contractors, advanced technology firms, or critical infrastructure providers. Real estate was largely an afterthought, reviewed only if it was incidentally attached to a corporate buyout. A foreign wealth fund buying an empty field in Texas or a warehouse in Virginia was simply not on the committee's radar.[2]

That paradigm fractured with the passage of the Foreign Investment Risk Review Modernization Act (FIRRMA). Recognizing that espionage and surveillance do not require corporate ownership, Congress granted CFIUS explicit jurisdiction over "greenfield" real estate purchases—empty land or existing buildings—located near sensitive government sites. The law acknowledged that proximity itself is a national security vulnerability.[2]

The mechanism of this new authority is entirely spatial. The Treasury Department identifies specific military bases, testing ranges, and intelligence facilities. It then draws regulatory perimeters around them. The rules establish two primary types of geographic zones: a one-mile "close proximity" radius for highly sensitive sites, and a 100-mile "extended range" radius for installations where line-of-sight surveillance or signals intelligence gathering is a broader threat.[1]

Recently, the scale of this map has expanded dramatically. Treasury has systematically added dozens of new military bases to its jurisdiction list, effectively dropping new 100-mile regulatory circles across the American landscape. When these radii overlap, they create massive, contiguous zones of federal oversight that blanket entire regional commercial real estate markets.[1][3]

This creates a jarring dual-track system for property development. A commercial developer might spend years securing every necessary permit from a county zoning board to build a logistics center, a data facility, or a wind farm. The local mayor might champion the project for its tax revenue. Yet, if the capital stack includes foreign investment and the parcel falls within a CFIUS radius, the federal government can kill the project entirely on classified national security grounds, overriding local sovereignty.[3]

Proponents of the expansion argue that framing this as "federal zoning" is a category error. They point out that a true zoning law applies to the land itself, dictating use regardless of who holds the deed. CFIUS, by contrast, only applies to foreign persons. A domestic buyer can purchase the exact same parcel next to a military base without triggering any federal review. Therefore, they argue, it is a targeted national security filter, not a land-use policy.

That counter-argument is technically true but economically hollow. In modern commercial real estate, capital is inherently global. Large-scale developments—particularly data centers, advanced manufacturing hubs, and energy infrastructure—rely heavily on international private equity, sovereign wealth funds, and cross-border joint ventures. By regulating the specific capital that can be deployed on specific parcels, CFIUS is functionally dictating what can be built and by whom.[3]

The national security imperative driving this is undeniably real. The intelligence community has documented repeated instances of foreign entities attempting to purchase land near drone bases, naval shipyards, and missile silos. The threat of signals intelligence collection, or simply establishing a physical presence to monitor troop movements and logistics, requires a robust defensive posture. The open nature of the US real estate market was a vulnerability that adversaries were actively exploiting.[2]

However, the implementation of this defense has created a severe compliance burden for the real estate industry. Unlike a local zoning map, which is publicly available and clearly delineated, the exact boundaries of CFIUS jurisdiction are notoriously opaque. The government provides the list of bases and the radius rules, but it does not publish a definitive, parcel-level map. Developers are forced to rely on expensive legal counsel and proprietary mapping software to guess if their project falls inside the federal net.[3]

This opacity creates a chilling effect that extends far beyond adversarial nations. Because the rules apply broadly to "foreign persons," allied capital—from Canadian pension funds to European infrastructure investors—is increasingly caught in the regulatory friction. The uncertainty of a potential CFIUS review, which can take months and end in a forced divestment, is enough to drive global capital away from certain regions entirely.

Ultimately, the expansion of CFIUS real estate jurisdiction represents the quiet institutionalization of national security zoning. As the definition of what constitutes a "sensitive facility" continues to broaden, the map of federal control will inevitably grow. The United States is currently navigating a profound transition: balancing its historic commitment to open, locally governed property markets against the realities of great power competition. For now, the Pentagon is winning the turf war.[3]