Flood zone is a property-line fact.

Standard homeowners policies do not cover flood damage. Coverage comes from the National Flood Insurance Program or a private flood insurer — a separate policy with its own premium, deductible, and limits.

In a Special Flood Hazard Area (zones starting with A), flood insurance is federally required for federally backed mortgages. Lenders enforce it at closing and for the life of the loan — it belongs in the monthly cost model, not the surprise column.

NFIP policies typically take effect 30 days after purchase, with limited exceptions — notably coverage bought in connection with a loan closing. Quote flood insurance during diligence, because the premium can move the affordability math on riverfront homes.

Use FEMA's Map Service Center (msc.fema.gov) — enter the property address to see the effective Flood Insurance Rate Map (FIRM) panel and zone. It is the official record that lenders and insurers use. Municipal offices and the county can help interpret the map, but the FIRM panel is the source.

Zones A and AE are FEMA's high-risk Special Flood Hazard Area — land with at least a 1% annual chance of flooding (AE adds a determined base flood elevation; A does not). Shaded Zone X is moderate risk (0.2% annual chance), and unshaded Zone X is minimal mapped risk. Definitions come from FEMA's flood zone glossary.

If the building sits in a Special Flood Hazard Area (zones starting with A) and the mortgage is federally backed, flood insurance is federally required. Outside the SFHA it is optional but often inexpensive — and flooding outside mapped zones is common, especially in flash-flood terrain.

No. Standard homeowners policies exclude flood damage. Coverage comes from the National Flood Insurance Program (NFIP) or private flood insurers. NFIP policies typically carry a 30-day waiting period before taking effect, with limited exceptions such as purchase at loan closing — so quote early, not at settlement.

The Delaware River corridor — from Riegelsville down through Yardley, Morrisville, and the tidal reach below Trenton — took three major main-stem floods in September 2004, April 2005, and June 2006. Creek towns along the Neshaminy saw serious flooding from Hurricane Ida's remnants in September 2021, and Upper Makefield's July 2023 flash flood killed seven people. Per-town notes on this site cover each river and creek town.