The typical range is $2,000–$10,000 for a standard 1,000 sqft basement, depending on water contamination category, finish level, and depth. Clean water from a pipe burst averages $3–$5/sqft; gray water from a washing machine or sump overflow runs $5–$8/sqft; black water or sewage backup costs $8–$13/sqft and requires hazmat-grade treatment. A finished basement (drywall, carpet, flooring) adds 30–60% over an unfinished space because porous materials must be removed before drying can begin.
- Clean water (Category 1): $3–$5/sqft, typical 1,000 sqft = $3,000–$5,000
- Gray water (Category 2): $5–$8/sqft, typical 1,000 sqft = $5,000–$8,000
- Black water / sewage (Category 3): $8–$13/sqft, typical 1,000 sqft = $8,000–$13,000
- Finished basement adds 30–60% vs unfinished for same water category
- Deep water (>6 inches) adds 20–40% for extended extraction and drying equipment
| Water Category | Unfinished Basement (1,000 sqft) | Finished Basement (1,000 sqft) |
|---|---|---|
| Clean water (Category 1) | $3,000–$5,000 | $3,900–$8,000 |
| Gray water (Category 2) | $5,000–$8,000 | $6,500–$12,800 |
| Black water / sewage (Cat 3) | $8,000–$13,000 | $10,400–$20,800 |