When Millions of Dollars Aren’t Enough: The Iowa Supreme Court Redefines Vested Rights

How much money does a developer need to spend before the government cannot pull the rug out from under a project? On April 24, 2026, the Iowa Supreme Court answered: how much you spend doesn’t matter—no permit, no vested right. The case, Worthwhile Wind LLC v. Worth County Board of Supervisors, carries significant implications for land use developers across Iowa, particularly those operating in unzoned areas where no permitting framework exists.

The Setup: An Invitation Turned Revocation

The facts read like a cautionary tale. Worth County had long embraced wind energy. With 229 turbines already operating within its borders and a 2017 Board of Supervisors resolution enthusiastically proclaiming that “there are no county ordinances, permits or other approvals required for construction and operation” of wind projects, the county actively courted development. Worthwhile Wind LLC, an affiliate of Chicago-based Invenergy, took the county at its word and embarked on a multi-year effort to develop a 165-megawatt wind farm involving up to fifty-five turbines across roughly 100 parcels.

Between 2018 and early 2021, Worthwhile executed over 160 easement agreements with local landowners, posted approximately $3.8 million in interconnection security deposits with the regional grid operator, commissioned extensive environmental and engineering studies, and even poured two enormous concrete “seal slab” foundations. When the political winds shifted, the district court found that Worthwhile had committed over $7 million to the project.

Public sentiment soured following the completion of the existing wind farm project. Two new supervisors were elected, and in April 2021, the Board adopted a moratorium on commercial wind energy development. After more than a year of failed negotiations between the county and Worthwhile over the terms of a possible development agreement, the Board enacted a new ordinance in June 2022 imposing setback distances, height limits, noise restrictions, and shadow flicker standards that Worthwhile contended rendered approximately 98.2% of its targeted acreage unbuildable. Worthwhile never attempted to comply with the new ordinance and instead filed a declaratory judgment action, claiming it had vested rights to complete the project under pre-moratorium law and that the county had acted in bad faith. The district court agreed—Worthwhile had vested rights and the county acted in bad faith.

The Majority: No Permit, No Vested Right

Justice McDonald, writing for the majority, reversed the district court on both grounds. The opinion notes that the vested rights doctrine exists to mediate the tension between a local government’s legislative power to regulate land use and a developer’s reliance on governmental action. The court identifies three general approaches nationally: the majority approach requiring substantial construction or expenditure in reliance upon a lawfully issued permit; the minority approach that vests rights at the time a conforming application is filed; and an intermediate approach requiring some form of governmental approval, such as a conditional use permit or approved site plan.

By deeming a permit a “threshold condition,” the court firmly aligns Iowa with the majority approach. Under Iowa law, the court held, a developer must point to a validly issued permit or formal governmental approval—such as an approved plat—as the predicate for any vested rights claim. A developer’s plans remain “speculative” and “no property right has crystallized that could be infringed by a subsequent change in zoning law” until the developer obtains a permit or formal governmental approval. Because Worthwhile never applied for or obtained a permit to construct or operate the wind turbines, the court concluded that its vested rights claim failed as a matter of law.

The majority rejected Worthwhile’s argument that requiring a permit in unzoned areas where no permit is available produces an absurd result reasoning that a developer who spends money in an unzoned area “does so with knowledge that local government retains the full scope of its legislative power to enact zoning regulations.” In the court’s view, no enforceable right arises in a “regulatory vacuum.” The opinion emphasized the speculative nature of Worthwhile’s project, noting that the developer had not selected a turbine model, could not identify the number of turbines it would build, and had spent less than 1% of the project’s estimated total cost of over $300 million. The right Worthwhile claimed—“the right to construct an unknown number of unspecified turbines at unidentified locations to be sold to an undisclosed buyer”—lacked the definiteness the vested rights doctrine presupposes.

The court concluded that Worthwhile failed to carry its burden to find the county acted in bad faith. The majority acknowledged that the moratorium resolution’s express reference to “a wind energy company” and its temporal proximity to the county’s learning of the project were “suggestive.” But the court found that the new ordinance imposed precisely the kinds of setback, height, noise, and flicker restrictions that local governments routinely adopt. More than a year of negotiations between the moratorium and the ordinance attenuated any inference of improper purpose, and the county’s decision to create a permitting regime where none existed was, in the court’s words, “a paradigmatic exercise of the police power, not evidence of bad faith.”

The Dissent: A Sharp Rebuke

Justice McDermott’s dissent strongly disagreed with the majority opinion. Opening with the observation that the county “successfully attract[ed] an energy company to develop wind turbine projects” only to “backtrack,” the dissent characterizes the majority as having “abandoned” Iowa’s established two-part test for vested rights and replaced it with a rigid permit requirement that finds no support in the court’s own precedents.

The dissent is anchored by Iowa’s longstanding framework from Quality Refrigerated Services, Inc. v. City of Spencer, which asks two questions: (1) did the property owner make substantial expenditures toward the use in question before the zoning change, and (2) were those expenditures lawful? Justice McDermott argues that Iowa case law has never treated a permit as a prerequisite for vested rights—it has treated a permit as relevant only to the question of lawfulness, and only when a permit was actually required. Where no permit is required, the developer’s expenditures are lawful by definition.

The dissent marshals a formidable line of Iowa precedent to support this reading. In Kasparek v. Johnson County Board of Health, property owners who purchased subdivision lots before the county imposed a new five-acre lot-size requirement were held to have vested rights to install septic systems under the prior regulations without ever having obtained a permit. In Board of Supervisors v. Paaske, a property owner who spent just $8,126 in preparatory work on an unzoned parcel was found to have vested rights to complete a housing project despite a subsequent ordinance. In Incorporated Town of Carter Lake v. Anderson Excavating & Wrecking Co., a landfill operator’s previously approved lease gave rise to vested rights despite the absence of any permit. And in Nemmers v. City of Dubuque, the Eighth Circuit, applying Iowa law, held that $140,000 in preliminary grading was sufficient to vest rights without a building permit.

Justice McDermott also takes aim at the majority’s comparison of Worthwhile’s $2.8 million expenditure to the project’s estimated $300 million total cost. The dissent argues that Iowa law has never required a minimum ratio between pre-moratorium expenditures and total project cost, citing Paaske for the proposition that “‘[i]t is impossible to fix a definite percentage of the total cost which establishes vested rights and applies to all cases.’” Moreover, because Worthwhile was designed as a “development-transfer” project—one that would be sold to a third party for construction—the dissent argues the proper comparator is the development-stage sale price of $11.5 to $33 million, not the full construction cost.

Perhaps the dissent’s most memorable passage comes at its close. Invoking Justice Oliver Wendell Holmes’s famous maxim that citizens ‘“must turn square corners when they deal with the Government,’” Justice McDermott counters with Justice Robert Jackson’s rejoinder that “there is no reason why the square corners should constitute a one-way street.” The dissent warns that by “turning away from our vested-rights precedents, we have severely undermined predictability not only for the developer in this case, but for all developers considering complex wind energy projects in our state.”

The Bottom Line: Developers Beware

Worthwhile Wind sends a clear signal: spending millions of dollars on a development project in Iowa—even one that the local government openly encouraged—will not create vested rights unless the developer has obtained a permit or other formal governmental approval. For developers working in unzoned areas, vested rights may be impossible to acquire, since there is no permitting framework from which to seek approval.

The practical takeaway is straightforward but significant. Developers should seek formal governmental approvals at the earliest possible stage, even if current law does not require them. Where no permitting regime exists, developers should consider negotiating development agreements or seeking other formal assurances from local governments before committing substantial capital. The court’s opinion expressly noted that other constitutional protections—including the Contracts Clause, the Due Process Clause, and the Takings Clause—“might provide alternative avenues of relief against arbitrary or confiscatory governmental action,” but those claims were not before the court.

Legal scholars and practitioners will debate whether the majority or the dissent has the better reading of Iowa precedent, but Worthwhile Wind has certainly reshaped the landscape of vested rights law in Iowa. Developers that proceed without formal governmental sign-off do so at their own peril.