Zoning Overlays & Bonuses in Johnson County, IA (2026)
1 county-level rule, plus city-specific rules for 1 city in Johnson County, Iowa.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Johnson County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Density Bonus Law
Johnson County lets subdivisions in the Agricultural Residential (AR), Residential Single-Family (RS), and Residential Multiple-Family (RM) districts build 25% more dwelling units than the district's base density allows, if half the subdivision is set aside as permanent open-space, agricultural, preservation, or infrastructure outlots.
Johnson County Zoning Density Bonus Rules
Some RestrictionsJohnson County UDO § 8:2.8(G)(1)
G. Bonuses. Residential subdivisions in the AR, RS, and RM districts may be eligible for bonuses. 1. Density Bonuses. Subdivisions in the AR, RS, and RM districts may qualify for additional density if they meet certain standards. If fifty (50) percent of the subdivision is placed into outlots for open space, agriculture, preservation, or infrastructure, not including roads, the subdivision ma...
Zoning Overlays & Bonuses by City in Johnson County
1 cities in Johnson County have their own zoning overlays & bonuses rules. Each link goes to that city's dedicated page with code citations.
All Johnson County ordinances
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