Property · Insurance Term
Flood Insurance
Definition
Flood insurance covers physical damage from flooding, such as rising water, overflowing rivers or bayous, and storm surge, which standard commercial property policies exclude. It is available through FEMA's National Flood Insurance Program and from private insurers, each with its own limits and rules.
In Plain English
Most property policies exclude flood and surface water, so flood needs separate coverage. The National Flood Insurance Program caps non-residential coverage at $500,000 for the building and $500,000 for contents. For apartment buildings with five or more units (not condos), the caps are $500,000 for the building and $100,000 for contents.
NFIP policies generally have a 30-day waiting period, with exceptions, such as coverage bought in connection with making, increasing, extending or renewing a loan. The NFIP pays commercial contents at actual cash value, and it doesn't cover lost business income.
Private flood insurance can offer higher limits, replacement cost terms or business income, depending on the policy. For buildings in high-risk flood zones with loans from federally regulated or insured lenders, federal rules require the lender to require flood insurance.
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Example
Hypothetical and simplified: An office building worth $1.5 million sits in a high-risk zone and carries an NFIP building policy with a $500,000 limit. A flood causes $700,000 of damage. The NFIP pays up to $500,000, minus the deductible, leaving at least $200,000 for the owner unless excess or private flood coverage is in place.
Why It Matters for Texas Property Owners
Houston and much of the Texas coast face repeated flood risk from heavy rain and storm surge. Flood is excluded from standard property policies and from TWIA's wind and hail coverage, so it needs its own policy. With a 30-day wait on most new NFIP policies, buy before storm season rather than when a storm is already in the Gulf.
What to Watch For
- Ask whether your property policy excludes flood, surface water or both.
- Compare your building and contents values with NFIP limits.
- Plan around waiting periods instead of waiting for a storm forecast.
- Ask about flood coverage for lost business income, which the NFIP doesn't provide.
Common Questions
Do I need flood insurance if I'm not in a high-risk zone?
Your lender may not require it, but floods happen outside high-risk zones too. Whether to buy depends on your location, drainage and how much loss you could absorb.
Does my property policy cover water from a storm?
It may cover rain that gets in through storm damage, like a torn roof. Rising water from outside, which is flooding, is usually excluded.
Sources
- FloodSmart: Buy a flood insurance policy
- FEMA NFIP Summary of Coverage: Commercial Property
- FEMA: Understanding flood risk for real estate, lending and insurance professionals
Last updated October 14, 2026 · Primesure editorial team · How We Write