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Water DamageBasement Water Damage Repair Cost Calculator
Basement water damage ranges from a damp corner to a fully flooded floor. Enter the affected area and rate for a repair estimate.
Basement water damage repair commonly runs $1,000–$5,000, about $5–$9 per square foot for cleanup and drying, more if finished walls and flooring must be torn out. Sewage backup or deep flooding pushes far higher.
How this calculator works
We price the affected basement area for extraction and repair, then add drying and dehumidification — essential below grade where moisture lingers. Finished basements cost more because porous drywall, insulation, and flooring usually come out.
What changes the number
- Finished vs unfinished is the big swing — finishes get demolished and rebuilt.
- Sewage backup (Category 3) multiplies the per-sqft rate.
- Ongoing seepage may require foundation waterproofing or a sump pump.
- Fast extraction limits mold and lowers the total.
Frequently asked questions
Is a flooded basement covered by insurance?
It depends on the source. A burst pipe is often covered; surface flooding from rain or groundwater usually needs separate flood insurance. See our water damage insurance claim calculator.
How fast should I act on basement water?
Immediately — standing water and humidity can start mold within 24–48 hours, turning a cleanup into a remediation job.