Zoning Overlays & Bonuses in Polk County, IA (2026)
1 rule for unincorporated Polk County, Iowa.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Polk County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Density Bonus Law
Unincorporated Polk County awards a 5% density bonus, minimum 20-unit development, to Conservation Design subdivisions whose engineer proves added stormwater controls like bioswales, buffer strips and native grasses cut runoff by 50% or more from every proposed structure and graded area. The bonus rounds down to the nearest whole unit.
Density Bonus for Conservation Developments, Polk Co.
Some RestrictionsPolk County Zoning Ordinance, Art. 9, Div. 3, Sec. 3
Section 3. Density Bonus Density bonuses may be provided by the County for developments meeting purpose and intent of this conservation ordinance and when additional on-site storm water management measures and practices are incorporated into the development. The additional units should not change the character of the proposed development or adjacent developments. (A) To obtain a density bonus...
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