Accessory Structures in Linn County, IA (2026)

1 county-level rule, plus city-specific rules for 1 city in Linn County, Iowa.

Verified from official government sources

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

ADU Rules

Unincorporated Linn County allows one ADU by-right per parcel with an existing single-family home. Max 1,200 sq ft or 50% of the principal dwelling, whichever is larger. Recently expanded from 800 sq ft.

accessory-structures/adu-rules

Few Restrictions

Full ordinance details →Official source ↗

Accessory Structures by City in Linn County

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

Cedar Rapids

5 verified rules • ADU Rules, Carport Rules

All Linn County ordinances

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

Linn County Ordinance Hub →