Elevation Certificates in Washtenaw County
Washtenaw County is not among Michigan's highest-risk flood counties, but it has a well-defined flood zone problem concentrated along the Huron River corridor. The Huron River runs east through the county, passing through Dexter, Ann Arbor, and Ypsilanti before exiting into Wayne County. The floodplain along its eastern stretch, particularly in Ypsilanti, includes residential properties that sit within FEMA Special Flood Hazard Areas.
If your Washtenaw County property is flagged in a flood zone by your lender or FEMA's Flood Map Service Center, you will need an elevation certificate before flood insurance can be issued. In 2026, this costs $300 to $700 for most residential properties in the county.
Ypsilanti and the Huron River Floodplain
Eastern Ypsilanti carries the most concentrated flood zone exposure in Washtenaw County. Neighborhoods near the Huron River between Ypsilanti and the Wayne County line have AE and AH flood zone designations on FEMA maps. Properties in these areas often trigger mandatory flood insurance requirements during mortgage origination or refinancing.
The City of Ypsilanti and Ypsilanti Township share the river corridor but have separate building and permitting processes. Surveyors familiar with both jurisdictions navigate the documentation requirements more efficiently. If your property sits near the city-township boundary, ask prospective surveyors about their experience with both.
Some properties in this corridor were built at elevations that actually sit above the base flood elevation, but sit within the mapped flood zone based on older FEMA data. An elevation certificate can confirm this and support a LOMA application to remove the flood insurance requirement entirely.
Ann Arbor: Less Common but Not Absent
Most of Ann Arbor proper sits on higher ground and is not heavily affected by flood zone requirements. However, properties near Huron River parks and lower-lying neighborhoods on the city's north and west sides occasionally fall in mapped flood zones. Buyers of properties near the Huron River recreational corridor between Ann Arbor and Dexter should check FEMA flood maps before closing.
Milan and Rural Tributaries
The River Raisin and its tributaries run through the southern part of Washtenaw County near Milan. Some parcels in this area carry flood zone designations, particularly along the river's path through Milan Township. If you are buying agricultural or rural property in southern Washtenaw County and the lender flags a flood zone, an elevation certificate may be required.
How to Use an Elevation Certificate
Once a licensed surveyor completes the certificate, you can share it directly with your lender, your insurance agent, or FEMA for a LOMA application. The process for each:
- Lender: Submit the certificate to satisfy the flood insurance documentation requirement for your mortgage.
- Insurance agent: The agent uses the lowest floor elevation and base flood elevation data to calculate your NFIP premium. A higher floor elevation relative to the BFE means a lower premium.
- FEMA LOMA: If the data supports removal from the flood zone, you submit a LOMA application at no cost. FEMA typically processes these within 60 days. Approval removes the mandatory flood insurance requirement.
Getting Started
Choose a licensed Michigan land surveyor with experience on FEMA elevation certificates in Washtenaw County. They will know the local base flood elevations from FEMA map panels covering the Huron River corridor and can advise whether your property's elevation data is likely to support a LOMA before you spend money on the certificate.
Find a land surveyor in Washtenaw County who handles elevation certificates in Ann Arbor, Ypsilanti, and the surrounding region.