Elevation Certificates in DuPage County, IL
DuPage County's two primary flood corridors, Salt Creek and the West Branch Du Page River, run through some of its most developed communities. Elmhurst, Villa Park, Lombard, Wheaton, Glen Ellyn, and Lisle all have properties mapped in FEMA Special Flood Hazard Areas. Elevation certificates are a routine part of buying, selling, insuring, and improving properties near these waterways.
What an Elevation Certificate Does
An elevation certificate (EC) records the elevation of a building's lowest floor, including basement or crawlspace if applicable, relative to the Base Flood Elevation (BFE) established by FEMA's Flood Insurance Rate Maps. It is prepared by a licensed Illinois Professional Land Surveyor (PLS) or engineer using FEMA Form FF-206-FY-22-152.
The difference between your lowest floor and the BFE directly affects your flood insurance premium. If your floor is above the BFE, your risk is lower, and premiums can drop substantially. If it is below, premiums increase accordingly.
Flood Zones in DuPage County
Salt Creek Corridor
Salt Creek drains a large portion of northeastern DuPage County, flowing through Elmhurst, Villa Park, and Lombard before continuing into Cook County. FEMA Zone AE designations follow the creek through these communities. Properties within a few blocks of the creek and in low-lying areas are most commonly affected.
West Branch Du Page River
The West Branch Du Page River runs from northwestern DuPage through Glen Ellyn, Wheaton, and Lisle. FEMA maps show Zone AE floodplain areas along much of this corridor. Downstream areas near the river's confluence with the main branch can also be affected during heavy rain events.
East Branch Du Page River
The East Branch runs through Addison and Glendale Heights. Lower-lying parcels near this corridor have historically experienced flooding and may carry Zone AE or Zone AH designations on current FEMA maps.
When You Need an Elevation Certificate in DuPage County
- Mortgage on a flood zone property: Federal law requires flood insurance for properties in SFHAs with federally backed mortgages. The insurer needs an EC to rate the policy.
- New construction or substantial improvement: DuPage municipalities require elevation certificates before issuing certificates of occupancy for buildings in flood zones.
- LOMA application: If you believe your property was incorrectly mapped into a flood zone, an EC is the primary evidence for a Letter of Map Amendment.
- Refinancing: Lenders often require a current EC when refinancing a property that was previously flagged as being in a flood zone.
Cost of an Elevation Certificate in DuPage County
Standard residential elevation certificates in DuPage County cost $450 to $750. Factors that push costs higher include:
- Properties with complex grading or multiple structures on the same parcel
- Sites where GPS benchmarking requires additional setup
- Locations where the surveyor must establish a new elevation reference due to distance from existing benchmarks
Some surveyors bundle elevation certificates with boundary surveys for a combined discount. If you need both, ask about package pricing when getting quotes.
How to Check Your Flood Zone
Use the FEMA Flood Map Service Center at msc.fema.gov to search your property's current FIRM designation. If you are in Zone AE, AH, or AO, you are in a Special Flood Hazard Area and should contact a surveyor about an elevation certificate. Resources on flood insurance and zone definitions are also available at floodsmart.gov.
Find a Surveyor for Your Elevation Certificate
Only a licensed Illinois PLS can certify an elevation certificate in DuPage County. Verify any surveyor's license status at idfpr.illinois.gov before hiring.
Our directory lists surveyors serving Naperville, Wheaton, Downers Grove, Elmhurst, Glen Ellyn, Lombard, Lisle, Woodridge, and all of DuPage County. Find an elevation certificate surveyor in DuPage County here.