Regulatory Takings (Penn Central) vs. Per Se Takings (Lucas)
A detailed comparison of these two constitutional law rules, including key differences, exam strategies, and guidance on when to apply each.
Overview
Penn Central and Lucas represent two different tests for determining when a government regulation constitutes a "taking" requiring just compensation under the Fifth Amendment. They apply in different circumstances and use fundamentally different analytical approaches.
Penn Central Transportation Co. v. New York City (1978) established a multi-factor balancing test for regulatory takings claims. The three principal factors are: (1) the economic impact of the regulation on the claimant, (2) the extent to which the regulation has interfered with distinct investment-backed expectations, and (3) the character of the governmental action (physical invasion vs. public program adjusting benefits and burdens). Penn Central is the default test for most regulatory takings challenges and involves case-by-case, ad hoc factual inquiry rather than bright-line rules.
Lucas v. South Carolina Coastal Council (1992) established a categorical (per se) rule: when a regulation deprives an owner of all economically beneficial use of their property, it is a taking requiring just compensation, regardless of the public interest served. The only exception is if the prohibited use was already restricted by background principles of state property or nuisance law. Lucas applies only in the narrow circumstance of total deprivation of economic value; if the owner retains any economically beneficial use, the Penn Central balancing test applies instead.
The relationship between the two is hierarchical. Lucas is a threshold inquiry: if the regulation eliminates all economic value, it is a per se taking. If some economic value remains, the court applies Penn Central balancing. This means Lucas is narrower in scope but more favorable to property owners when it applies, because it creates a categorical rule rather than a fact-intensive balancing test.
Key Differences
| Aspect | Regulatory Takings (Penn Central) | Per Se Takings (Lucas) |
|---|---|---|
| When it applies | Default test for regulatory takings when some economic value remains | Only when regulation eliminates all economically beneficial use |
| Analytical approach | Multi-factor balancing (economic impact, expectations, character of action) | Categorical per se rule; total deprivation = taking |
| Government defense | Government can argue the balancing favors regulation | Only defense: the use was already prohibited by background property/nuisance law |
| Outcome certainty | Fact-intensive, ad hoc, unpredictable | Bright-line: total deprivation is automatically a taking |
| Frequency of application | Most regulatory takings claims are analyzed under Penn Central | Rarely applies because total deprivation is uncommon |
Exam Tips
On a constitutional law exam, analyze Lucas first. If the regulation eliminates all economically beneficial use, it is a per se taking under Lucas and you need only address the background principles exception. If some value remains, apply the Penn Central three-factor test. A common exam trap is a regulation that eliminates most but not all value: this falls under Penn Central, not Lucas. Also note Loretto v. Teleprompter Manhattan CATV Corp. as the other per se takings rule: permanent physical occupation is always a taking regardless of economic impact. Together, Lucas (total economic deprivation) and Loretto (permanent physical occupation) are the two per se takings categories; everything else is Penn Central.
When to Apply Which
Apply Lucas when a regulation eliminates all economically beneficial use of the property. Apply Penn Central when the regulation reduces but does not eliminate the property's economic value. In practice, most takings claims are analyzed under Penn Central because total deprivation is rare. Use Lucas as the threshold inquiry and Penn Central as the default analysis.