Elevation Certificates in Monroe County, NY
Monroe County, home to Rochester and a string of Lake Ontario shoreline communities, carries substantial flood risk in 2026. If you own property in Greece, Irondequoit, Webster, or along the Genesee River corridor through Rochester, there is a real chance your parcel falls within or near a FEMA-designated Special Flood Hazard Area. An elevation certificate, prepared and certified by a licensed land surveyor, is the document your lender and flood insurer need to accurately assess your risk and calculate your premium under the National Flood Insurance Program.
Monroe County's Flood Hazard Landscape
Three primary features drive flood risk across Monroe County: the Lake Ontario shoreline, the Genesee River, and Irondequoit Bay.
Lake Ontario Shoreline
The municipalities of Greece, Irondequoit, and Webster stretch along the southern shore of Lake Ontario. In 2017 and again in 2019, record high lake levels caused significant shoreline flooding and property damage across these communities. Structures within a few hundred feet of the lakeshore face FEMA-mapped coastal and riverine flood hazards, and properties in Zone AE along the lake's floodplain are subject to mandatory flood insurance purchase requirements when federal mortgage financing is used. FEMA updated Monroe County flood maps in recent years to reflect better data on lakeshore elevations, which means some properties that were once outside the SFHA may now fall within it.
Genesee River Corridor
The Genesee River flows northward through the heart of Rochester before discharging into Lake Ontario near the Port of Rochester in Charlotte. Properties along the river's banks in the Lower Falls, Brooks Landing, and Charlotte neighborhoods of Rochester face Zone AE flood designations. Downstream of the Lower Falls, the river's floodplain widens and the risk of high-water events during spring snowmelt and major rain events is well documented. Several historic industrial and residential parcels along the river's lower reaches are subject to both riverine flooding and backwater effects from Lake Ontario during high-water years.
Irondequoit Bay
Irondequoit Bay, a long inlet on the eastern side of Monroe County that connects to Lake Ontario, creates additional flood exposure for properties in Irondequoit and Webster. The bay shoreline and its tidal inlet are mapped as high-risk flood zones, and low-lying residential streets near the bay's southern end in Irondequoit see periodic flooding during major rain events combined with high lake levels. An elevation certificate is essential for any property transaction involving a lakeshore, bayfront, or riverside parcel in these areas.
What an Elevation Certificate Measures
A licensed land surveyor conducting an elevation certificate survey will measure and document:
- The elevation of the lowest floor of your structure (including any basement, crawl space, or attached garage) in relation to the base flood elevation (BFE) shown on FEMA's current flood insurance rate map
- The type of foundation your structure sits on (slab, piers, fill, etc.)
- The presence and dimensions of any enclosures below the lowest floor
- The FEMA flood zone and FIRM panel number applicable to your property
- Photographs of the building's exterior and a diagram showing its position on the lot
The completed form is signed and sealed by the PLS, making it an official legal document that can be submitted to your insurer, lender, or local floodplain administrator.
Elevation Certificate Costs in Monroe County
| Service | Typical Cost Range (2026) |
|---|---|
| Elevation Certificate (residential) | $450 to $800 |
| Floodplain Letter of Map Amendment (LOMA) support | $500 to $1,500 |
| Boundary survey (required for some LOMA filings) | $900 to $2,200 |
Lakefront lots in Greece, Irondequoit, or Webster and properties near the Genesee River with complex terrain or limited prior survey data tend to be at the higher end of the cost range. Always obtain at least two quotes from licensed surveyors before committing.
Using Monroe County GIS to Research Flood Zones
Monroe County's Department of Environmental Services maintains a GIS mapping portal at monroecounty.gov/des-gis. Property owners can use this tool to perform address-based searches and overlay current FEMA flood zone layers on the county parcel map. This is a useful first step to understand your potential exposure before engaging a surveyor. However, this GIS layer is for reference only. For insurance and lending purposes, the definitive flood zone determination comes from the FEMA Flood Map Service Center at msc.fema.gov and the certified elevation certificate itself.
Verifying a Surveyor's License in New York
Before hiring anyone to prepare your elevation certificate, verify that the individual holds a current Professional Land Surveyor (PLS) license in New York State. Use the free license lookup tool at the NYSED Office of the Professions portal, op.nysed.gov. Enter the surveyor's name or license number and confirm the license is active and in good standing. Working with an unlicensed or expired-license provider puts your insurance coverage and loan closing at risk.
Find a Licensed Surveyor in Monroe County
Whether your property is on the Lake Ontario shoreline in Greece or Webster, along the Genesee River in Rochester, or near Irondequoit Bay, our directory can connect you with a licensed professional who knows Monroe County's flood zones and survey requirements. Browse elevation certificate surveyors in Monroe County, NY and get started today.