How Wausau Handles Accessory Structures: A Practical Guide

Wausau maintains 26 local ordinances across all categories, and 2 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Wausau falls on the strict-to-permissive spectrum compared to other cities.

Shed Rules

Sheds in Wausau are accessory structures under Title 23 of the Wausau Municipal Code. The City of Wausau Inspections, Zoning and Electrical Systems Division requires a building permit for any detached garage, lean-to, storage building, gazebo or similar accessory structure - including prefab sheds and buildings built off-site and placed on the lot. Permit applications are submitted through the city's Evolve Permit Portal and are reviewed by the Inspections Division at (715) 261-6780.

Key details: Code Title: Title 23 Zoning. Permit Required: Yes (all sheds). State Code: Wis. Stat. 62.23 / SPS 320-325. Permit Portal: Evolve Permit Portal. Inspections Phone: (715) 261-6780.

A shed installed without a required Wausau zoning or building permit, in the front yard, or inside the applicable side- or rear-yard setback violates Title 23 of the Wausau Municipal Code and is enforceable by the Inspections, Zoning and Electrical Systems Division. Typical responses include a stop-work order, an after-the-fact permit fee, or an order to relocate or remove the structure, with continued non-compliance referable to the City Attorney for forfeiture and abatement.

ADU Rules

Wausau regulates dwellings, accessory uses, and accessory structures through Title 23 (Zoning) of the Wausau Municipal Code, adopted under Wis. Stat. Sec. 62.23. Residential zoning districts include SR-2, SR-3, SR-5, and SR-7 single-family residential districts (see Article II - Establishment of Zoning Districts) and various two-family/multifamily and mixed-use districts including UMU (Urban Mixed Use). Land use regulations (Article III, beginning at Sec. 23.03) and accessory use/structure standards establish where and how accessory living quarters are permitted. The Wausau Municipal Code does not explicitly use the term 'ADU' in its public table of contents; property owners considering an accessory dwelling, in-law unit, or second residential unit should confirm permitted/conditional status with the Inspections & Zoning Division at 407 Grant St., which administers building and zoning permits.

Key details: Title 23 Of: Title 23 of the Wausau Municipal Code is the city Zoning Ordinance. Wausau Zoning Authority: Wausau zoning authority: Wis. Stat. Sec. 62.23. Singlefamily Residential Distr: Single-family residential districts: SR-2, SR-3, SR-5, SR-7. Urban Mixed Use: Urban Mixed Use district (UMU) and two-family/multifamily districts also exist. Accessory Usesstructures And: Accessory uses/structures and floodplain overlay interact under Sec. 23.05.30(2)(c).

Building or occupying an accessory dwelling unit, second living unit, or in-law suite without the required zoning approval and building permits violates Title 23 and Title 15 of the Wausau Municipal Code. Enforcement may include stop-work orders, citations, daily forfeitures under the city's general penalty provisions, and orders to remove or modify non-conforming structures. Operating a second unit as a separate rental in a single-family district where it is not a permitted, conditional, or lawfully nonconforming use is independently actionable.

The Bottom Line

Wausau's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Wausau is broadly strict or permissive.

Keep in mind that Wausau can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.