Property · Insurance Term
Excess Flood Insurance
Definition
Excess flood insurance provides flood coverage above the limits of a primary flood policy, usually an NFIP policy. Owners use it when a building or its contents are worth more than the NFIP maximums, which are $500,000 for a non-residential building and $500,000 for its contents.
In Plain English
The National Flood Insurance Program caps commercial coverage. Non-residential buildings can get up to $500,000 for the building and $500,000 for contents. Apartment buildings with five or more units (not condos) can get up to $500,000 for the building and $100,000 for contents, and many commercial buildings are worth far more.
Excess flood policies come from private insurers and pick up where the primary policy stops. Some also cover items the NFIP doesn't, such as lost business income. Terms and deductibles vary, so the excess policy should be checked against the primary.
Other options include private flood insurance as the primary layer with higher limits, or flood coverage within a difference in conditions policy. The right structure depends on the property's value, location and lender requirements.
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Example
Hypothetical and simplified: An office building worth $3 million has an NFIP building policy with a $500,000 limit and a $2.5 million excess flood policy above it. A flood causes $1.2 million of building damage. The NFIP pays up to $500,000, less its deductible, and the excess policy may pay the remaining $700,000, subject to its terms.
Why It Matters for Texas Property Owners
Houston and the Texas coast have a long history of major flooding, and flood is excluded from standard property policies. For Texas commercial buildings worth well over $500,000, excess or private flood coverage is often how owners close the gap.
What to Watch For
- Compare your building's replacement cost with your NFIP limit.
- Check that the excess policy's terms line up with the primary flood policy.
- Ask whether lost business income from flood can be covered.
- Ask about waiting periods, since NFIP policies generally have a 30-day wait and private excess policies may have their own.
Sources
Last updated October 14, 2026 · Primesure editorial team · How We Write