Accessory Structures in Marathon County, WI (2026)

1 county-level rule, plus city-specific rules for 3 cities in Marathon County, Wisconsin.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Marathon County. If you live within an incorporated city, that city's own rules apply — see the city list below.

ADU Rules

Marathon County zoning (General Code Ch. 17) regulates accessory structures and second dwellings only in the 42 towns that have adopted county comprehensive zoning. Wausau, Rothschild, Schofield, Weston, Mosinee, Kronenwetter, and other incorporated cities/villages administer their own zoning codes. Wisconsin has no statewide ADU mandate.

accessory-structures/adu-rules

Some Restrictions

Full ordinance details →Official source ↗

Accessory Structures by City in Marathon County

3 cities in Marathon County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.

Mosinee

2 verified rules • ADU Rules, Shed Rules

Rothschild

2 verified rules • ADU Rules, Shed Rules

Wausau

2 verified rules • ADU Rules, Shed Rules

All Marathon County ordinances

See every category we cover for Marathon County — parking, noise, fences, fires, animals, pools, and more.

Marathon County Ordinance Hub →