The Justs owned low-lying, marshy land along the shore of a navigable water body in Marinette County, Wisconsin. Pursuant to state law authorizing county shoreland zoning (Wis. Stat. § 59.971 (now § 59.692)) and the Wisconsin Constitution's public trust doctrine (art. IX, § 1), Marinette County adopted a shoreland-wetland zoning ordinance regulating activities such as filling, grading, dredging, lagooning, ditching, and excavating within designated distances of navigable waters and in mapped wetlands. Without obtaining the required county permit, the Justs began placing fill to raise and convert portions of the marsh into buildable land for residential development. The county sought and obtained an injunction to halt the unpermitted filling and to require compliance with the ordinance. The Justs challenged the ordinance as applied to their property, arguing that restricting their ability to fill and develop constituted an unconstitutional taking without just compensation, and contending that the regulation exceeded the county's authority.
Does a county shoreland-wetland zoning ordinance, adopted pursuant to state authority to protect navigable waters and public rights, effect an unconstitutional taking by prohibiting a landowner from filling and altering marshy shorelands without a permit, or is it a valid exercise of the police power to prevent harm to public resources?
Under Wisconsin law, regulations enacted pursuant to the police power that are reasonably related to preventing harm to public health, safety, and welfare—particularly the protection of navigable waters and public rights under the public trust doctrine—do not constitute a compensable taking, even if they restrict certain uses of private property or diminish its value. Property rights are held subject to the state's duty to protect navigable waters, and an owner has no absolute right to change the natural character of shorelands and wetlands in ways that injure public rights. The question is one of reasonableness: whether the regulation bears a substantial relation to a legitimate public purpose and prevents harm rather than confers a special public benefit.
The Wisconsin Supreme Court upheld the shoreland-wetland zoning ordinance as a constitutional exercise of the police power and affirmed injunctive relief. The ordinance's restrictions on filling and altering wetlands adjacent to navigable waters did not effect an unconstitutional taking of the Justs' property.
The court grounded its analysis in the public trust doctrine, which imposes on the state a fiduciary-like duty to protect navigable waters for public uses such as navigation, fishing, recreation, and water quality. Shorelands and wetlands adjacent to navigable waters are integral to those public interests: they filter pollutants, store floodwaters, support fisheries and wildlife, and stabilize shorelines. Allowing private owners to fill and convert wetlands would foreseeably degrade water quality, exacerbate flooding, and diminish public uses—harms the state is obligated to prevent. Characterizing the ordinance as harm-preventing, the court analogized to long-accepted exercises of the police power—such as nuisance abatement—where compensation is not required. The regulation did not appropriate the Justs' land for public use; it simply required that the land be kept in (or altered only with a permit to ensure) its natural condition to avoid injury to public rights. The court emphasized that property ownership is not absolute: owners hold title subject to reasonable regulations that protect the public welfare, especially where the public trust is implicated. The Justs could still use their land for purposes consistent with its natural state (e.g., recreation, hunting, and other low-impact uses), even if they could not fill to create buildable lots. Diminution in market value alone is insufficient to establish a taking when the regulation reasonably prevents harm. The court rejected arguments that the ordinance exceeded county authority, noting that the county acted under express state statutory authorization for shoreland zoning tailored to protect navigable waters. The ordinance's permit system and performance standards were reasonably related to legitimate environmental objectives and applied uniformly within the regulated area. Because the regulation was a valid exercise of the police power, the injunction to halt unpermitted filling was proper, and no compensation was due.
Just v. Marinette County is a touchstone in property and environmental law for its articulation of the harm-preventing police power and the relationship between the public trust doctrine and land use controls near navigable waters. It illustrates how environmental regulations that preserve the natural character of shorelands and wetlands can be sustained against takings challenges. For law students, the case provides an essential analytical framework later echoed in federal takings jurisprudence: it anticipates the idea that "background principles" of state property and nuisance law (including the public trust) can defeat takings claims (as recognized in Lucas v. South Carolina Coastal Council). It also remains a core Wisconsin case guiding shoreland and wetland regulation, demonstrating how reasonableness, not mere economic impact, drives the takings inquiry in harm-prevention contexts.
Just v. Marinette County stands as a seminal endorsement of environmental land use regulation grounded in the police power and the public trust doctrine. By upholding restrictions on filling and altering shoreland wetlands, the Wisconsin Supreme Court clarified that preventing harm to navigable waters and associated public rights is a legitimate, non-compensable regulatory goal. The case reinforces the principle that private property rights are not absolute; they coexist with enduring public interests embedded in state constitutional and common law.