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Floodplain
Development in Floodplains
The City of Johnston participates in the National Flood Insurance Program (NFIP) and has adopted regulations to manage development in floodplains. The floodplain regulations adopted by the City of Johnston establishes a flood fringe (FF) overlay district and a flood way (FW) overlay district. The regulations are found in Chapter 169 of the Zoning Ordinance, which outline permissible development in those areas. A floodplain development permit is required.

The Iowa Department of Natural Resources issues floodplain development permit also and a permit may also be required from them based upon the type of construction proposed.

To determine if your property is within the floodplain, review the Federal Emergency Management Agency (FEMA) Flood Insurance Rate Maps. Copies are available at Johnston City Hall for review. Electronic copies of the maps are also available from FEMA.

Floodplain Regulations

Because of the city's floodplain regulations, residents in the city are eligible to purchase flood insurance from the National Flood Insurance Program, please contact your insurance agent about flood insurance or review this link for more information.

For additional floodplain information, please contact the Community Development Department at 515-727-7778 or by email.