San Diego Files Lawsuit Against Federal Government Over Border Fence

The city of San Diego has initiated legal action against the federal government, claiming that the construction of a razor wire fence near the U.S.-Mexico border constitutes illegal trespassing on city property and poses significant environmental risks. The lawsuit, filed on January 2, 2026, in federal court, specifically targets the U.S. Department of Homeland Security and the U.S. Department of Defense.

According to the complaint, the razor wire fencing, currently being erected by U.S. Marines in the Marron Valley, has adversely affected protected plant and wildlife habitats. City officials allege that the presence of federal personnel in the area, which they discovered in December 2025, represents unauthorized intrusion into city-owned land. The lawsuit states that the ongoing construction efforts have prevented city officials from accessing the property to manage and assess the land adequately.

City officials assert that the federal actions have led to property damage and will continue to result in detrimental environmental impacts. They seek a court injunction that would require the federal government to cease all construction activities in the area and to respect the city’s property rights.

Heather Ferbert, the City Attorney, emphasized the city’s commitment to protecting sensitive habitats and upholding environmental agreements. “The city of San Diego will not allow federal agencies to disregard the law and damage city property,” Ferbert stated. “We are taking decisive action to protect sensitive habitats, uphold environmental commitments and ensure that the rights and resources of our community are respected.”

The lawsuit adds to ongoing tensions between local governments and federal authorities over border security measures. In response to the allegations, a spokesperson for the Department of Homeland Security stated, “Under the Trump Administration, we have the most secure border in American history. DHS will continue to use every tool in its toolbox to defend the American people from dangerous foreign criminals—and we look forward to challenging this lawsuit.”

As the legal proceedings unfold, the implications of this case could extend beyond the immediate environmental concerns, potentially influencing future federal actions regarding border security and local governance. The outcome will be closely watched, not only by San Diego but also by other cities facing similar challenges related to federal projects on local land.