Coverage question
Does homeowners insurance cover sewer backup?
Short answer
No, not by default. Standard homeowners policies exclude sewer and drain backups. You need the optional water backup and sump overflow endorsement — usually $40–$120/year.
How to check your policy in 30 seconds
- 1. Pull up your declarations page.
- 2. Search the endorsement schedule (usually page 2 or 3) for phrases like "water backup," "sump overflow," or "back-up of sewer."
- 3. If you see it, note the limit ($5k, $10k, $25k are common). If you don't, you're not covered.
Want us to check for you?
Upload your dec page — we'll confirm whether you have the endorsement and what your limit is.
Frequently asked
Does standard homeowners insurance cover sewer backup?
No. Every standard HO-3 policy in the U.S. excludes loss caused by water that backs up through sewers or drains. You need a separate 'water backup and sump overflow' endorsement to cover it.
How much does sewer backup coverage cost?
$40–$120/year for $5,000–$25,000 of coverage. Higher limits ($50,000+) are available from most carriers for a small additional premium.
Will my policy cover the cleanup?
Only if the water-backup endorsement is on your policy. With it, both cleanup/decontamination and physical damage to the structure and contents are covered up to your chosen limit.
Does flood insurance cover sewer backup?
Sometimes — NFIP flood insurance covers sewer backup only when it's a direct result of flooding on your property. A backup caused by a clog or city-main surge in dry weather is not covered by flood insurance.
Looking for the full breakdown? See our sewer backup coverage guide.
Keep reading
Sewer Backup Coverage
The $40/yr endorsement that turns a denied claim into a paid one.
Read moreCoverage gapsWater Backup Coverage
The $50/year endorsement that covers $25k of damage.
Read moreCoverage gapsWater Damage vs Flood
The distinction that decides whether you're covered.
Read more CalculatorDwelling Coverage Calculator
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