Floodplain Development Permit

1. Search Address

Before you create an application, make sure the address for your project is in the ‘unincorporated’ Johnson County area. Enter an address or KUPN number in the location search box provided. If the address returns with ‘Unincorporated Area’ then you can proceed with the permit application process. If your search returns with a ‘City’ name, then use the contact information provide to contact your city planning department.

2. Application Process

Before You Apply

A. Would the proposed development on this property be located in an Area of Special Flood Hazard? If YES, a Flood Plain Development Permit is required and the development must comply with the following:  

  1. Flood Plain Development Permits for new or substantially improved residential structure(s) in designated Area of Special Flood Hazard but not in a Floodway Area are conditioned on the structure(s) being elevated so the lowest floor (including basement floor) would be at least two (2) feet above the Base Flood Elevation.  
  2. Flood Plain Development Permits for new or substantially improved non-residential structure(s) in designated Areas of Special Flood Hazard are conditioned on the structure(s) either being elevated so the lowest floor (including basement floor) would be at least two feet above the Base Flood Elevation or, for non-residential structure(s) only, the structure(s) being flood proofed to an elevation at least two feet above the Base Flood Elevation.  
  3. The Permits also are conditioned on the provision of additional information and certifications as indicated in Sections E. and F. of this form.  
  4. Development within Areas of Special Flood Hazard where Base Flood Elevations and Floodways have not been determined shall not be approved if the development would result in a 1-foot or greater rise in the Base Flood Elevation. 

B. Would the proposed development on this property be located in a Floodway Area? If YES, a Flood Plain Development Permit is required and the development must comply with the following:  

  1. Permits for proposed development in any Floodway Area within any Area of Special Flood Hazard are not issued without certification that the development would not result in any increase in the Base Flood Elevation, and the Permits are subject to the provision of additional information and certifications as indicated in Sections E. and F. of this form. 

How to Apply

1. A completed Flood Plain Development Permit Application 

2. Additional Information and Certifications required before a Flood Plain Development Permit is approved and to be provided by qualified, registered, professional engineer(s) or architect(s) licensed in the State of Kansas and whose services the applicant shall obtain.  

a. If the proposed development would be located in any Area of Special Flood Hazard, the following must be provided: a.  

i. The Mean Sea Level (MSL) elevation proposed for the lowest floor (including basement floor) of each proposed structure, or  

ii. The Mean Sea Level (MSL) elevation to which each proposed non-residential structure would be flood proofed, and certification that the proposed development would withstand the hydrostatic and hydrodynamic loading conditions of expected flood events, and  

iii. Determination and certification of the Base Flood Elevation (BFE), including calculations, a map (to scale) showing the Base Flood boundaries, and a grading plan with maximum topographic contour intervals of five (5) feet for any development or subdivision greater than fifty (50) lots or five (5) acres, and  

iv. Determination and certification that the development would not raise the Base Flood Elevation (BFE) one foot or more.       

b. If the proposed development would be located in a Floodway Area, a determination and certification that the development would not result in any increase whatsoever of the Base Flood Elevation (BFE). 

3. After Construction Elevation Certifications (To be provided by the applicant before issuance of a Zoning Permit and after completion of construction in accordance with an approved Flood Plain Development Permit.)  

a. For development located in a flood hazard area, the following certifications by a qualified, licensed, professional engineer, architect or land surveyor must be provided:  

i. The certified as-built Mean Sea Level (MSL) elevation of the lowest floor (including basement floor) of each residential structure.  

ii. The certified as-built Mean Sea Level (MSL) flood proofed elevation of each non-residential structure, or the certified as-built Mean Sea Level (MSL) elevation of the lowest floor (including basement floor) of each nonresidential structure. 

4. Summary of Elevation Certifications: (Attach Certification(s)  

a. The certified as-built Mean Sea Level elevation of the lowest floor (including basement floor) of each residential structure is _____ feet.  

b. The certified as-built Mean Sea Level (MLS) flood proofed elevation of each non-residential structure is ____ feet, or The certified as-built lowest floor Mean Sea Level elevation (including basement floor) of each non-residential structure is ____ feet. 

Other Permits Required?

  • Corps of Engineers Permit, Kansas City Office 816-983-3533 
  • State Permit, Division of Water Resources 785-296-5440 
  • Building Permit, Grading Permit, Hauling Permit, etc.