Wausau, WI Building Safety: Electrical Permits (2026)

Section 18.05.010 requires notifying the Electrical Inspector and securing a permit before any building, structure, or premises is wired for lights, meters, heating units, signs, refrigeration, or other electrical wiring, before installing electrical equipment, or before altering an existing wiring system. A permit is not required for connecting equipment rated 120 volts or 20 amps or less that plugs into a permanently installed receptacle, but installing or replacing a fire alarm system needs both a permit and a license, since the code treats a fire alarm system as any wiring connected to a listed SPS 316.11 fire alarm control panel. Applicants must be a contractor licensed for the work sought, or otherwise authorized under Wisconsin Statutes Chapter 101, and must file an application naming the owner, the work address, and a description of the work along with the required fee.

Section 18.01.020 adopts the Wisconsin State Electrical Code, plus Wisconsin Administrative Code SPS 316 and SPS 305 Subchapter IV, as the technical standard behind this title, with the stricter of city or state requirements governing where they conflict. A permit expires 12 months after issuance if work has not started, under Section 18.05.020, though a written request before expiration can extend it up to 120 additional days. Section 18.07.020 lets a property owner personally wire their own single-family dwelling if they secure the permit, pay the fees, do the work themselves, and pass the Electrical Inspector's inspection, but that homeowner's privilege does not cover new electrical services or service upgrades, in-ground pools, spas, or hot tubs, or new construction before an occupancy permit issues.