Case Law-special benefit

A clear example in South Dakota case law where the principle of “special benefit” was enforced strictly, leading to an assessment being invalidated, is the 2010 South Dakota Supreme Court case concerning the City of Pierre’s curb and gutter project. 

While the case did not specifically use the term “flat fee,” it effectively struck down assessments that were applied without adequate proof that the property owners received a special, quantifiable benefit greater than the general public’s benefit. 

Case Example: Carlson v. City of Pierre (2010)

The case, often referred to in summaries as Carlson v. City of Pierre, involved homeowners challenging special assessments levied by the city for the replacement of curb and gutter in front of their homes. 

The Key Issue: The city levied the assessments using a calculation method, but the homeowners argued they received no “special benefit” from the replacement—the street was already functional, and the improvement primarily served the public good and future city infrastructure plans, not a specific enhancement to their private property value. 

The Ruling: The South Dakota Supreme Court agreed with the homeowners. The court determined that the assessment constituted an unconstitutional taking because the city failed to provide sufficient evidence that the amount of the special assessment did not exceed the actual special benefits conferred upon each specific property. 

The court emphasized the core constitutional principle that the cost of a public improvement exacted in substantial excess of the special benefits accruing to private property is an unconstitutional taking of private property for public use without compensation. This principle effectively invalidates any uniform or “flat fee” assessment where the actual benefit to individual properties is not specifically measured and proven to equal or exceed the amount assessed.