When a storm hits, does water pool around your house?

Heavy rain runs over the ground and collects in low spots, sometimes right against the walls, where it can get in through a window well or a garage ramp. Enter an address, pay $39 once and see how deep the water gets around the building in a 100-year storm, where it collects around you and, on the island of Montréal, what the street drains carry away.

Check an address for $39How it worksSee a sample result

$39 CAD per property, taxes included. Result usually in about fifteen minutes (occasionally up to about thirty when the service is busy), delivered by email and on this site.

A real rain check, recorded on floodverity.com. No account, no subscription.

How it works

  1. Type the civic address. We locate it and model a hexagon about 400 m in radius centred on the address.
  2. Pay once by card through Stripe. No account, no subscription.
  3. We drop a 100-year, 1-hour design storm on the 1 m government terrain model, resampled to a 2 m simulation grid, route the runoff over the ground, and email you a private link to the result.

What you get

  • How deep rain water gets on the ground against the walls of your building in a 100-year storm, and whether it collects there or drains away.
  • Where the water collects around you and, on the island of Montréal, how much the municipal street drains carry away.
  • How the water builds and drains through the streets around you during the storm, as an animated map and a 3D view with the buildings.
  • A PDF report with the data sources and the screening disclaimer, to keep or to discuss with a professional such as a notary or a contractor. If the calculation fails its quality checks or the document cannot be produced, no report is issued, but you still get the full result on this site.
Check an address for $39See a sample result

What the maps do not show

Québec's flood-zone maps cover rivers and lakes, not the rain water that collects around your building in a storm. This check covers only the rain that falls on and around the property. It shows the water standing on the ground next to the walls; it does not know your door, window-well or garage levels, so it cannot say whether water gets inside. A river or lake next to the property is not modelled, and neither is sewer backup, which comes up through the basement drains. For that risk, ask a plumber about a backwater valve.

For professionals

Brokers, notaries, lenders, builders, municipalities and insurers: we run the same check over a list of addresses and deliver a spreadsheet (CSV) ranking them by the modelled rain depth, with a methodology note and the data-source table; the map layers of each run (GeoJSON, GeoTIFF) on request. Priced per address; ask us for a quote.

Ask for a portfolio screening

Licensing and acquisition

FloodVerity is a complete platform: static screening engine, optional hydrodynamic solver, hexagonal areas of interest, flood-order sweeps, 3D, reports, exports, billing. It is available for licensing or acquisition.

Get in touch

FloodVerity applies a design rainstorm to public terrain data and simulates where the rain runs and collects. It is a screening, not a hydraulic study, and not an official flood-zone determination.