Flooded Basement Repair Cost Calculator

A fully flooded basement means water extraction, drying, sanitizing, and often rebuilding. Enter the flooded area and rate for a realistic estimate.

Quick answer

Repairing a flooded basement typically costs $3,000–$10,000+, often around $10–$15 per square foot once extraction, drying, sanitizing, and rebuild are combined. Sewage or deep, prolonged flooding can exceed $20,000.

How this calculator works

We combine a per-square-foot rate for drying and rebuild with a flat amount for the pumping, extraction, and equipment a full flood requires. The wide high-end reflects sewage contamination and prolonged saturation, which can more than double a clean-water job.

What changes the number

Water depth and how long it sat drive mold risk and material loss.
Sewage or storm water (Category 3) requires sanitizing and raises the rate sharply.
Rebuild of drywall, flooring, and built-ins is often the largest line.
Preventing the next flood (sump pump, backflow valve, grading) is an added but worthwhile cost.

Frequently asked questions

Does homeowners insurance cover a flooded basement?

Internal failures (burst pipe, failed water heater) are often covered; external flooding from rain, rivers, or groundwater generally needs a separate flood policy.

What should I do first with a flooded basement?

Cut power to the area if safe, stop the water source, and start extraction fast — every hour of standing water raises the repair and mold risk.