Elevation Certificates in Story County: What Ames Property Owners Need to Know
Two waterways shape Story County’s flood risk picture: the South Skunk River, which flows through central Ames, and Ioway Creek (renamed from Squaw Creek in 2021), a tributary that drains south Ames before joining the South Skunk. FEMA’s current Flood Insurance Rate Maps show AE flood zone designations along both waterways, affecting properties in several Ames neighborhoods. Elevation certificate costs in Story County run $150 to $300 for most residential properties in 2026.
The South Skunk River and Ames Flood Risk
South Skunk River Corridor
The South Skunk River runs roughly through the center of Ames, creating a mapped floodplain that extends outward from its banks into adjacent residential and commercial areas. Properties within the mapped AE zone along this corridor may require flood insurance under NFIP rules when the mortgage is federally backed. Iowa State University itself has infrastructure near the South Skunk, and the river corridor is integrated into the Ames trail and park system, bringing residential development close to the floodplain edge in several neighborhoods.
An elevation certificate, prepared by a licensed Iowa land surveyor, documents your lowest finished floor elevation and compares it to the base flood elevation on the current FIRM panel. When your floor is above the BFE, insurers can rate your policy at a lower premium. When it is below, the certificate still provides accurate documentation rather than leaving the insurer to default to a conservative estimate.
Ioway Creek
Ioway Creek drains a substantial portion of south Ames before emptying into the South Skunk. The creek was renamed from Squaw Creek in 2021 following a city council vote. Its floodplain affects properties in south Ames neighborhoods and in some areas near the commercial corridors along South Duff Avenue and US-30. Homeowners near the creek who carry flood insurance, or whose lenders have flagged a flood zone designation at closing, typically need an elevation certificate to finalize their policy or appeal the designation.
When You Need an Elevation Certificate in Story County
- Flood insurance purchase: Your lender has identified a Special Flood Hazard Area designation and requires NFIP coverage. The insurer needs the certificate to set your premium.
- Premium review: You are currently paying flood insurance and want to confirm whether your actual elevation supports a lower rate than what you are paying.
- LOMA application: Your property was mapped into the flood zone but you believe the designation is incorrect based on your actual ground elevation. An elevation certificate is the required documentation for a FEMA Letter of Map Amendment.
- Building permit in an AE zone: Ames requires elevation documentation before issuing permits for new construction or substantial improvements to structures in mapped AE zones.
- Real estate transaction: A buyer’s lender flags a flood zone designation during underwriting and requires documentation before approving the mortgage.
What the Survey Process Involves
A licensed Iowa land surveyor visits your property and measures the elevations required by FEMA Form 086-0-33. This includes your lowest finished floor elevation, the elevation of the lowest adjacent grade, and other reference points depending on the structure type. The surveyor completes the form, stamps it with their professional seal, and delivers the finished certificate.
Fieldwork takes a few hours. Total turnaround in Story County is typically one to two weeks. Only a licensed Iowa PLS can legally sign an elevation certificate under Iowa Code Chapter 542B.
To find a licensed surveyor who prepares elevation certificates in Ames and throughout Story County, visit our Story County land surveyor directory.