FEMA is direct about it: most homeowners insurance does not cover flood damage. Flood insurance is a separate policy for the building, the contents, or both. It is available in participating National Flood Insurance Program communities, and it is required for many homes in high-risk zones that carry a government-backed mortgage.
That requirement is the floor, not the full picture. Floods happen outside mapped high-risk zones. Updated flood maps and heavier rainfall have pulled more properties into a conversation they did not have five years ago. Industry notes heading into 2026 also flagged that many flood premiums are running 10% or more above the prior year, especially for homes newly added to flood zones.
Commercial buildings have the same gap. A commercial property form typically excludes flood unless you add dedicated coverage. If the building sits near a waterway, in a coastal market, or in an area with drainage problems, that exclusion is worth pricing — not discovering after a claim.
A short checklist
- Pull the flood zone and elevation information for the address, even if you have never been required to buy a policy.
- Decide whether you need building coverage, contents coverage, or both.
- If you are buying, do not wait for the lender to tell you. Waiting can delay closing or leave a gap at possession.
- Coordinate flood with the homeowners or commercial property policy so deductibles and limits are not working against each other.
Sources: FEMA Flood Insurance; NFIP consumer guidance; 2026 industry flood-premium commentary.