Larimer County regulates floodplains to manage flood risks and protect public safety and property. The regulations are designed to ensure that any development in or near floodplain areas complies with local, state, and federal floodplain management standards. A Floodplain Development Permit is typically required for any development or construction activities within designated floodplain areas. 

The Larimer County Flood Review Board is responsible for reviewing and making recommendations to the County Engineer on selected floodplain management issues within the county.

A Permit is required for

• New structure construction
• Additions to existing structures
• Building improvements, remodels, and repairs
• Non-structural
  • storage of equipment or materials (including outdoor storage)
  • grade changes
  • drainage pattern changes
  • paving
  • bank stabilization
  • stream restoration
  • bridges and culverts
  • change of use of the property
  • any other development (any manmade change to improved/unimproved real estate)

Identify floodplains

Larimer County Flood Information Locator

• "Layer Themes" tab:  select the "Layers List" button
• remove the checkmark from items you don't want

Required documentation includes

 Floodplain Development Permit Fees