A parcel-level certificate built from the federal record — your erosion rate, storm-surge exposure, uncertainty, and whether the next step should be a licensed coastal survey, engineering review, or permit consultation. Not the neighborhood. The address.
“The coast was never going to hold still — but it does leave a record.”
In ten months — 93% of the measured beach — differenced straight from Sentinel-2 satellite imagery. We didn’t model it. We measured it. On the reach report, the projected waterline is drawn over the houses that are still standing.
See the Westhampton reach report →Read a real one — the Camp Hero bluffs at Montauk Point, eroding 3.1 ft/yr with the recent rate running 2.67× the century average. Every figure traces to a federal source.
The screening layer before the field report: rate, setback, horizon, storm exposure, uncertainty, and a clear recommendation on whether licensed site review is warranted.
Long-term and recent erosion rates with a 90% confidence interval, and your distance to the mapped shore.
Every historical survey since the 1800s, plotted — the sea drawing measurably nearer, decade by decade.
Your surge depth by category, the storms that have passed, and an escape plan built for your parcel's regime.
The seafloor that decides how much storm-wave energy reaches your bluff toe — the cause behind the rate.
Source vintage, confidence intervals, coverage limits, and the field conditions an automated screen cannot verify.
A single, dated finding: stable, watch, elevated, or critical — and the years until the edge reaches the house.
Compiled from the public archives of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration. The certificate cites every dataset by name.
For a buyer in diligence, an attorney at closing, a lender underwriting the collateral, or an owner who wants the truth about the ground.