Wis. Stat. § 66.1108: Limitation on weekend work.

(1) Definitions. In this section:

(a) “Construction project” means a project involving the erection, construction, repair, remodeling, or demolition, including any alteration, painting, decorating, or grading, of a private facility, including land, a building, or other infrastructure that is directly related to onsite work of a residential or commercial real estate development project.

(b) “Political subdivision” means a city, village, town, or county.

(2) Construction projects; weekend work.

(a) A political subdivision may not prohibit a private person from working on the job site of a construction project on a Saturday. A political subdivision may not impose conditions that apply to a private person who works on a construction project on a Saturday that are inapplicable to, or more restrictive than the conditions that apply to, such a person who works on a construction project during weekdays.

(b) If a political subdivision has enacted an ordinance or adopted a resolution before April 5, 2018, that is inconsistent with par. (a), that portion of the ordinance or resolution does not apply and may not be enforced.