Floodplain Development Permit in Unincorporated Fremont County, Wyoming
VerifiedRequired for construction, excavation, or other development within Fremont County's FEMA-mapped 100-year flood hazard areas (near Lander, Dubois, Hudson, and Riverton). This is one of the county's only two general land-development permit categories, since Fremont County has no county-wide building code.
Verified 2026-07-01 · Source
When you need this permit
- Required if the property lies within a mapped flood hazard area per the Fremont County Mapserver 'Flood Hazard Zones' layer
- Construction is restricted in all zones with a 0.1% annual chance of flooding (the 100-year floodplain)
- Construction is forbidden entirely within the mapped Floodway
- Complete and submit an Application for Floodplain Development through the Planning Department before any excavation or construction begins
- An Elevation Certificate or Floodproofing Certificate may be required depending on the scope
- A Floodplain Zoning Regulation Variance may be requested for exceptions
Required documents
- Req
Floodplain Development Permit Application
Fremont County Planning Department application for any development within a mapped flood hazard area
- Req
Floodplain Application Information
Instructions/informational packet accompanying the application
- Opt
Elevation Certificate
Required for structures in mapped flood hazard areas to document lowest-floor elevation relative to base flood elevation
- Opt
Floodproofing Certificate
Required if floodproofing (rather than elevation) is used to meet floodplain construction standards
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Floodplain Development Permit | $750.00 | Fremont County Planning and Rural Addressing FY 2025 Fee Schedule, effective 7-1-2025 |
Review timeline
~1–30 business days
Typical estimate — confirm current times with the Unincorporated Fremont County building department
Inspection process
- 1
Floodplain Compliance Review
Flood Plain Administrator (Steve Baumann) reviews development for compliance with the Fremont County Floodplain Zoning Regulations
Tips
- Fremont County participates in the National Flood Insurance Program (NFIP) — flood insurance is available to unincorporated county property owners whether or not the property lies within a mapped flood hazard area.
- Turn on the 'Flood Hazard Zones' layer on the Fremont County Mapserver to check your parcel before designing any project near Lander, Dubois, Hudson, or Riverton.
- The towns of Lander, Riverton, Dubois, Hudson, and Shoshoni participate in the NFIP; Pavillion does not.
Frequently asked questions
- Does unincorporated Fremont County require a building permit for a new house?
- No general county building permit exists — Fremont County has no county-wide building code (confirmed on the county's own Building Codes & Certificates of Occupancy page). The county's only development-permit trigger is if your property lies within a FEMA-mapped flood hazard area, in which case a Floodplain Development Permit ($750) is required before construction.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- Fremont County Planning Department — official building department
- Fremont County Planning Department — Floodplain Zoning
- Fremont County Planning Department — Building Codes & Certificates of Occupancy
- Fremont County Planning and Rural Addressing FY 2025 Fee Schedule (effective 7-1-2025)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Fremont County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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