Water damage restoration cost.
Water damage cost is driven by how far the water spread and how contaminated it is, and clean supply-line water is far cheaper to restore than sewage or flood water.
Water damage restoration cost by damage severity
| Minor: one room, drying only | $1,200 – $3,500 |
| Moderate: multiple rooms, soaked drywall | $3,500 – $8,000 |
| Severe: flooding, sewage, or structural | $8,000 – $22,000 |
Typical installed range for a 400 sq ft project. Adjust the estimator for your own size.
Priced on wet square footage, multiplied by water category
Mitigation is priced on the floor area water actually touched, not your whole house, and the IICRC S500 water category sets the rate. Category 1 (clean water from a supply line) runs $3.00–$4.50 per square foot. Category 2 (grey water from a dishwasher, washer, or toilet overflow without solids) runs $4.00–$7.00. Category 3 (sewage, flooding, groundwater) runs $7.00–$12.00 because it adds containment, PPE, and contaminated disposal. Most US jobs land between $1,300 and $6,400.
What actually moves the price
How fast you called, which literally changes the category
Untreated Category 1 water becomes Category 2 or 3 within 24 to 48 hours as bacteria multiply. A washing machine overflow found Monday and ignored until Wednesday is a black water job by standard. Speed is not just about mold; it changes the rate your entire job is priced at.
Class, which is separate from category
Class measures how much material absorbed water. Class 1 is minimal and dries in 2–3 days. Class 2 means carpet and cushion plus moisture up to 24 inches in walls, 3–5 days. Class 3 is saturation from overhead. Class 4 is specialty drying of hardwood, plaster, and concrete. Higher class means more equipment and more drying days.
Equipment days, billed per unit
Air movers run $25–$50 per unit per day with a typical job using 6 to 12, and LGR dehumidifiers $75–$150 per unit per day using 2 to 4. Equipment alone on a three-day Class 2 job runs $900–$2,500. This is why drying time is a cost driver rather than a schedule detail.
Reconstruction, which is a different job
Mitigation dries and removes. Rebuilding runs roughly $20–$37 per square foot and is billed separately, as are mold remediation and contents cleaning. A quote that looks low may simply be mitigation only, which is legitimate but not the whole number.
What a complete quote names out loud
- The IICRC S500 category and class assigned, in writing
- Affected square footage measured, not estimated from room size
- Equipment count and expected drying days, since both are billed
- Moisture readings and a drying log, which insurers require
- Whether the scope is mitigation only, or includes reconstruction
- Antimicrobial treatment and disposal for Category 2 and 3 losses
The one to watch: A flat per-room price with no category, no class, and no moisture readings. On insurance work carriers expect line-item pricing in Xactimate backed by a documented scope. A number with no documentation behind it will not survive the claim.
Water damage restoration cost: FAQ
How much does water damage restoration cost?
Most US water damage restoration runs $1,300–$6,400, averaging near $3,900 for mitigation. Pricing is per affected square foot: about $3.00–$4.50 for clean Category 1 water, $4.00–$7.00 for grey Category 2, and $7.00–$12.00 for Category 3. Reconstruction is billed separately at roughly $20–$37 per square foot.
What are water Categories 1, 2, and 3?
They come from the IICRC S500 standard. Category 1 is clean water from a sanitary source such as a supply line or rainwater. Category 2 (grey) carries contamination from a dishwasher, washing machine, or toilet overflow without solids. Category 3 (black) is grossly contaminated: sewage, flooding, or any Category 1 or 2 water left long enough to grow bacteria.
Why does the same leak cost more if I wait?
Two reasons compound. The water category escalates within 24 to 48 hours, moving the job to a higher per-square-foot rate. And the class of saturation climbs as water wicks into walls, subfloor, and insulation, adding drying days and equipment. Fast mitigation is always the cheapest version of the job.
Does homeowners insurance cover water damage?
Most policies cover sudden and accidental water damage such as burst pipes, appliance failures, and supply line breaks. Gradual damage from a long-term leak typically is not covered. Flood damage requires separate flood insurance, and sewer backup usually requires a specific endorsement.
Is mold removal included in water damage restoration?
No. Standard mitigation covers extraction and structural drying. Mold remediation, contents cleaning, and reconstruction are separate line items. Category 3 losses frequently require remediation as well.