Prah v. Maretti, 108 Wis. 2d 223, 321 N.W.2d 182 (1982)

Historically, Wisconsin law did not permit one landowner to sue another landowner for obstructing access to sunlight across his property. Recognizing that by the 1980s sunlight had become viable alternative energy source, Abrahamson held, as an issue of first impression, that an owner of a solar-heated residence has a claim for private nuisance when his neighbor’s proposed construction interferes with his access to sunlight.