The Penn Central factors are the three considerations courts weigh to decide whether a government regulation restricts private property so severely that the Fifth Amendment requires compensation. They come from the Supreme Court’s 1978 decision in Penn Central Transportation Co. v. City of New York, and they are: the economic impact of the regulation on the property owner, the extent to which the regulation interferes with the owner’s reasonable investment-backed expectations, and the character of the government action.1Constitution Annotated. Amdt5.10.6 Regulatory Takings and Penn Central Framework No factor controls on its own. Courts balance them together, case by case, which is why regulatory takings litigation is famously unpredictable.
Factor One: Economic Impact on the Owner
The first factor asks a straightforward question: how much value did the property lose because of the regulation? Courts usually answer it by comparing market value before and after the rule took effect, relying on appraisals and economic analysis.
What surprises most owners is how steep the drop has to be. There is no fixed percentage that triggers compensation, and the threshold sits far higher than intuition suggests. Courts have rejected takings claims involving diminutions of 75%, 85%, and in one well-known early case, 92.5%. The Court of Federal Claims has noted that it generally requires diminution well in excess of 85% before finding a regulatory taking under this framework. In practice, factor one favors the owner only when the regulation strips away nearly all value while leaving a nominal sliver behind.
The relevant question is whether the owner keeps some reasonable economic use, not whether the regulation blocked the most profitable use. Losing the right to build a shopping center on land that still supports single-family homes is a real financial loss, but it rarely rises to a constitutional violation.
The Parcel-as-a-Whole Problem
Before you can measure a percentage loss, you have to know what property you are measuring. An owner might hold one lot burdened by a wetlands rule and an adjacent lot that is unrestricted. Looking at the burdened lot alone, the loss can look total. Combining both lots, the loss can look modest.
The Supreme Court addressed this denominator question in Murr v. Wisconsin (2017), setting out three considerations for defining the relevant parcel. Courts give substantial weight to how state and local law treats the property, including boundaries and subdivision rules. They also weigh the land’s physical characteristics, such as topography and the relationship between distinct tracts. And they assess value under the challenged regulation, paying attention to whether restrictions on one tract create offsetting benefits for the owner’s other holdings.2Justia. Murr v. Wisconsin The parcel-as-a-whole rule generally works against owners because it enlarges the denominator and shrinks the apparent percentage loss.
Factor Two: Investment-Backed Expectations
The second factor looks at what the owner reasonably expected to do with the property when they acquired it, and how badly the regulation disrupted those plans.1Constitution Annotated. Amdt5.10.6 Regulatory Takings and Penn Central Framework The word “reasonable” carries most of the weight. A developer who buys land already subject to strict environmental rules and then complains those rules block development has a weak claim. The regulatory environment at the time of purchase sets the baseline for what the owner should have anticipated.
Courts want to see concrete, objectively reasonable plans, not vague hopes for future profit. A purchase agreement tied to a specific proposal, zoning approvals already in hand, engineering studies for a planned project: these help show that the owner invested based on a defined expectation. Speculation about what the land might someday support carries little weight.
Foreseeability matters too. If a property sits in an area where environmental or zoning rules have been tightening for years, a court may treat further regulation as foreseeable and conclude the owner assumed that risk. The scenario most likely to support a claim is a sudden, dramatic legal shift that reverses longstanding permissions. Owners who did thorough due diligence before buying stand in the best position here, because they can show exactly what the legal environment promised and how the new rule broke that promise.
Factor Three: Character of the Government Action
The third factor examines the nature of what the government did. The Supreme Court has distinguished between physical invasions of property and regulatory programs that adjust economic benefits and burdens across the community.3Legal Information Institute. Amdt5.9.6 Regulatory Takings and Penn Central Framework Even short of an outright physical taking, a regulation that resembles a forced occupation of property tilts this factor toward the owner.
Broad regulatory programs aimed at public health, safety, or environmental protection generally fare well under this factor. Courts are especially receptive to rules that spread burdens and benefits relatively evenly. A zoning ordinance capping building heights across a whole neighborhood restricts every owner but also protects every owner from a high-rise shadow next door. That mutual give-and-take, sometimes called a “reciprocity of advantage,” signals a legitimate exercise of government power rather than an unfair extraction from one owner for the public’s benefit.
What tips this factor against the government is a regulation that singles out one property, or a handful of owners, to bear a cost that should be spread across the community. If a city designates a single building as a landmark while leaving neighboring buildings unrestricted, that concentrated burden looks less like broad governance and more like forcing one owner to subsidize a public benefit.
How Courts Weigh the Three Together
The framework is deliberately flexible. The Court described it as calling for “essentially ad hoc, factual inquiries” with no rigid formula.1Constitution Annotated. Amdt5.10.6 Regulatory Takings and Penn Central Framework No single factor decides the outcome. A massive economic loss might not produce a taking if the owner bought into a heavily regulated market with eyes open. A more modest loss might support a taking if the government singled out one owner to shoulder a community-wide cost.
The overarching question is whether fairness requires the public to compensate the owner for the impact of the regulation.4Justia. Penn Central Transportation Co. v. New York City In practice, owners face long odds. The high threshold on economic impact alone screens out most claims, and the expectations factor screens out more. Claims that succeed usually combine severe financial loss, disrupted concrete plans, and a government action that looks more like targeted extraction than broad public policy. Honestly assessed, the test favors the government in most cases, and any owner weighing a claim should know that going in.
When Penn Central Doesn’t Apply
The three-factor test governs most regulatory takings disputes, but not all. The Supreme Court has identified two categories where a regulation is automatically a taking, and the factors never come into play.
The first is a permanent physical occupation of property, or a government authorization that lets someone else occupy it. Any such intrusion is a per se taking, no matter how small.5Legal Information Institute. Amdt5.9.7 Per Se Takings and Exactions In Cedar Point Nursery v. Hassid (2021), the Court held that a California regulation giving union organizers the right to enter agricultural property for three hours a day, 120 days a year, was a per se physical taking even though the access was temporary and limited.6Supreme Court of the United States. Cedar Point Nursery v. Hassid
The second is a regulation that strips away all economically beneficial use of property. The Court set this rule in Lucas v. South Carolina Coastal Council (1992), where a beachfront building ban left two residential lots with no development potential at all. One exception applies: if the regulation only restates a restriction that already existed under state property or nuisance law, no compensation is owed, because the owner never had the right to that use to begin with.7Justia. Lucas v. South Carolina Coastal Council
There used to be a fourth theory floating around: that a regulation was a taking if it failed to “substantially advance legitimate state interests.” The Supreme Court eliminated it in Lingle v. Chevron U.S.A. (2005), holding that whether a regulation effectively achieves its purpose is a due process question, not a takings question.8Justia. Lingle v. Chevron U.S.A. Inc. After Lingle, the three Penn Central factors and the two per se rules are the only frameworks courts use to analyze regulatory takings.