Building Codes and Design Criteria

West Des Moines follows specific codes to ensure all construction is safe and sustainable. The following codes are currently enforced:

Adopted Building Codes

  • 2021 International Building Code (IBC with amendments)
  • 2021 International Residential Code (IRC with amendments)
  • 2024 International Fire Code (IFC with amendments) - see WDM Fire Permits and Forms
  • 2021 International Property Maintenance Code (IPMC) 
  • State of Iowa Electric Code            (2023 NEC with amendments)
  • State of Iowa Mechanical Code    (2021 IMC with amendments)
  • State of Iowa Plumbing Code       (2024 UPC with amendments)
  • State of Iowa Energy Code            (2012 IECC)

 

Local Design Criteria

Engineers, designers and contractors should use the following for projects in West Des Moines:

Criteria Requirement
Frost Depth 42 inches
Ground Snow Load 30 lb. (24 lb. Roof Load)
Wind Speed 105/115/120 mph (based on risk category)
Seismic Zone A
Weathering Severe
Termite Condition Moderate to Heavy
Winter Design Temp -5 degrees
Ice Barrier Required Yes
Flood Hazard FEMA approved NFIP since 11-01-79
Rainfall Rate (100 Year) 3.4 inches per hour
Air Freezing Index 1833
Mean Annual Temp 48.6 degrees

Resources and Licensing

Use these links to find official code and licensing information: