Whether homeowners insurance covers a flooded basement depends on the cause. Sudden and accidental internal leaks (like a burst pipe) are often covered. However, groundwater flooding from outside is typically excluded, and sewer backups and sump-pump failures often require separate endorsements. Your carrier determines coverage based on your policy and the cause of loss.
What you need to know
Depends on the cause. Internal leaks are often covered; groundwater is often excluded; backups and sump-pump failures may need endorsements.
In detail
Coverage for a flooded basement hinges on the source of the water. If the flooding is from a sudden and accidental internal source — a burst pipe, a supply-line failure, or an appliance leak — it is often covered under a standard homeowners policy.
However, if the flooding is from groundwater entering from outside — through foundation walls, floors, or window wells — it is typically excluded under standard homeowners policies and may require separate flood insurance. Sewer backups and sump-pump failures often require specific endorsements or riders added to your policy.
Your provider documents the source and extent of the flooding for your claim, but does not guarantee coverage. Your insurance carrier makes the coverage determination based on your policy and the cause of loss. Contact your carrier or agent regarding your specific coverage and any endorsements you may need.
Insurance
Coverage depends on the cause. Groundwater flooding is often excluded; sewer backups and sump-pump failures may require endorsements. Your carrier makes the determination — contact them regarding your policy.
Related service
This answer relates to our Flooded Basement Cleanup page.
Flooded Basement CleanupRelated questions
Last reviewed: September 2026