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Construction Requirements

As part of the city's MS4 Permit, several requirements must be met during residential and commercial construction.

Grading Permits

If you are building a residential structure in Johnston, you are required to complete and submit a Building Department Notification Statement and Grading Permit. 

If you are otherwise building, excavating or grading (excluding agriculture or residential landscaping) a Grading Permit is required.

Stormwater Pollution Prevention Plan (SWPPP)

A SWPPP is required with any NPDES permitted site, and may also be required in support of a Grading Permit Application. The SWPPP Checklist provides information for your use.

Questions regarding the Grading Permit or SWPPP requirements can be directed to Eric Rehm at 727-7779 or erehm@ci.johnston.ia.us.

Other Resources

Iowa Rain Garden Design and Installation Manual.  Rain gardens are landscape features that help absorb runoff from rain events and clean it.  Designed correctly, they can be both attractive and provide an important benefit. The manual provides more information on the function, design and installation of rain gardens.  If you decide to hire a contractor to install a rain garden for you, be sure to ask some questions to be sure that they are familiar with proper installation.