Background
Adams Outdoor Advertising has operated a billboard near Madison since 1999, when the parcel sat within the separate Town of Madison. In 2006, Adams converted the billboard to a digital display—a change that was lawful under Town ordinances at the time. In 2022, the City of Madison annexed the parcel through an “attachment” process, bringing the billboard under the City’s Sign Control Ordinance, which contains a citywide ban on “Digital Image Signs.” MGO § 31.045(3)(i). There was no dispute that Adams’ billboard fell squarely within that definition.
In September 2023, the City’s zoning administrator issued an Official Notice ordering Adams to discontinue the digital features. Adams appealed to the City’s Urban Design Commission (UDC), arguing the billboard was a legal nonconforming use protected by Wis. Stat. § 62.23(7)(h), which prohibits municipalities from banning the continued lawful use of a structure existing before adoption of a zoning ordinance. The UDC declined to consider that legal argument, limiting its review to whether the billboard was a digital sign violating the ordinance, and affirmed the notice. The circuit court for Dane County affirmed on the ground that Adams was asking “more than the UDC can provide.”
Adams appealed, arguing that the UDC was required to consider the nonconforming-use defense and that, on the merits, the digital sign ban is a zoning ordinance that cannot be enforced against its preexisting structure without just compensation.
The Court’s Holding
The Court of Appeals, in an opinion by Presiding Judge Graham, agreed with Adams on the procedural question but not on the dispositive one. The court held that the UDC erred by refusing to consider the nonconforming-use argument. MGO § 31.043(1) grants the UDC broad authority to review “any … decision or determination” the zoning administrator makes “in the enforcement of” the sign ordinance, and nothing in that language limits review to the four corners of the ordinance or bars the UDC from resolving underlying questions of state law. Because Adams’ sole basis for challenging the Official Notice was the § 62.23(7)(h) defense, the UDC’s outright refusal to hear that argument meant it never “heard” Adams’ appeal at all, contrary to its mandate.
Nevertheless, the court exercised its authority to resolve the statutory question itself rather than remand, because the classification of an ordinance as zoning or non-zoning is a question of law reviewed de novo, and the record was fully developed. Applying the multi-factor framework from Zwiefelhofer v. Town of Cooks Valley, 2012 WI 7, the court examined whether the digital sign ban exhibited the traditional hallmarks of a zoning ordinance—geographic districting, use-based classification, comprehensive coverage of land uses, forward-looking fixed determinations, and built-in nonconforming-use protection. The court concluded that the digital sign ban lacks those characteristics and is instead a valid exercise of the City’s non-zoning police power.
Because Wis. Stat. § 62.23(7)(h) shields structures only from zoning ordinances, and the digital sign ban is not one, Adams cannot invoke nonconforming-use status. The court affirmed the circuit court’s order, albeit on different grounds than those relied upon below.
Key Takeaways
- Wisconsin’s nonconforming-use statute, § 62.23(7)(h), protects preexisting structures only from zoning ordinances—not from functionally similar regulations enacted under a municipality’s non-zoning police power.
- A municipality may choose to regulate signs, including digital billboards, through its non-zoning police power rather than through zoning, and that choice forecloses a landowner’s nonconforming-use defense even if the regulation operates much like a zoning restriction.
- The UDC’s appellate authority under MGO § 31.043(1) is broad: it must consider legal arguments—including state-law challenges to the nature of the ordinance being enforced—when those arguments are the sole basis for claiming the zoning administrator erred.
- When application of a statute presents a pure legal question and the record is adequate, an appellate court may decide the issue rather than remand to the administrative body, even if that body never reached the question.
Why It Matters
This decision exposes a significant gap in protection for outdoor advertising operators and property owners who are absorbed into a city through annexation. The traditional safeguard against retroactive sign enforcement—legal nonconforming use status—may be unavailable if the city’s sign ban was adopted as a non-zoning police power ordinance. Billboard operators and land-use counsel should now examine not only whether a sign was lawfully established before a new restriction took effect, but whether the restricting ordinance qualifies as a zoning ordinance under the Zwiefelhofer analytical framework—a determination that, after this case, can turn on subtle structural features of how the ordinance was drafted and enacted.
The ruling also carries procedural weight for litigants before the UDC and similar administrative bodies. Local appellate bodies cannot avoid hard legal questions by characterizing their review as limited to factual or ordinance-interpretation issues; when a legal argument is the sole basis for an appeal, the board must engage with it. Practitioners appealing sign enforcement actions in Madison should present the full legal theory at the UDC level rather than reserving it for circuit court.