Water Damage Restoration Cost Calculator
Most homeowners pay between $1,300 and $6,000 for water damage restoration, with a national average of about $3,000–$3,500. A small clean-water cleanup in one room runs roughly $450–$1,500. A fully soaked room needing structural drying runs $1,500–$5,000. Sewage, standing water or structural repairs push it to $5,000–$15,000 or more.
The calculator below uses the same framework restoration firms estimate against — the IICRC water category (how contaminated) and class (how much material is wet). Use it to sanity-check a quote before you accept one.
What drives the price
Two jobs covering the same floor area can differ threefold. These are the variables that do it.
By water category
| Category | Where it comes from | Cost effect |
|---|---|---|
| Category 1 — clean | Burst supply pipe, tap left running, rainwater, failed water heater | Baseline |
| Category 2 — grey | Washing machine or dishwasher discharge, toilet overflow without solids, clean water standing over 24h | About +35% |
| Category 3 — black | Sewage backup, ground or surface flooding, any water standing beyond ~48 hours | About +90% |
By damage class, per square foot
| Class | What it means | Mitigation rate |
|---|---|---|
| Class 1 | Part of one room, little absorption, mostly hard flooring | $3.00 – $4.50 |
| Class 2 | Whole room, carpet and underlay wet, wicking up walls under 24″ | $4.00 – $7.00 |
| Class 3 | Water came from overhead; ceilings, walls and insulation saturated | $6.00 – $9.50 |
| Class 4 | Hardwood, plaster, concrete or crawlspace — specialty drying | $7.50 – $13.00 |
Common add-ons
| Work | Typical cost |
|---|---|
| Mould remediation | $1,100 – $3,400 |
| Hardwood floor drying or replacement | $2.00 – $4.50 / sq ft |
| Ceiling & drywall repair | $350 – $1,800 |
| Contents pack-out & cleaning | $500 – $2,500 |
| Emergency night / weekend call-out | +10% – 20% |
What insurance usually pays for
The line insurers draw is sudden and accidental versus gradual and preventable. Most disputes come down to which side of it your claim falls on.
Usually covered
- Burst or frozen supply pipes
- Failed water heater or washing machine hose
- Accidental overflow from a bath or sink
- Storm damage that breaches the roof
- Firefighting water damage
Usually not covered
- Slow leaks left unaddressed over time
- Groundwater and surface flooding (needs flood insurance)
- Sewer backup without a specific endorsement
- Damage from deferred maintenance
- Mould, where it followed an uncovered cause
Before anything is moved or torn out, photograph and video everything, and keep receipts for emergency work — most policies require prompt mitigation and will reduce a payout if you delayed.
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Water damage restoration cost — FAQ
The questions homeowners ask most before authorising work.
How much does water damage restoration cost?
Most homeowners pay between $1,300 and $6,000, with a national average of roughly $3,000–$3,500. Minor clean-water cleanup in a single room runs about $450–$1,500. Moderate damage needing structural drying runs $1,500–$5,000. Major damage involving sewage, standing water or structural repairs runs $5,000–$15,000 or more. The three things that move the number most are how much floor area got wet, whether the water was clean or contaminated, and how long it sat before drying started.
How much does water damage restoration cost per square foot?
Water mitigation — extraction, drying equipment and daily monitoring — typically runs $3.00 to $4.50 per square foot for a small clean-water job, $4.00 to $7.00 for a fully soaked room, and $7.50 to $13.00 per square foot where hardwood, plaster or crawlspaces need specialty drying. Contaminated water raises those rates by roughly 35% for grey water and 90% for black water, because porous materials get removed rather than dried.
Does homeowners insurance cover water damage restoration?
Usually yes for sudden, accidental events — a burst pipe, a failed water heater, an overflowing appliance. Usually no for gradual damage such as a slow leak you did not notice, or for groundwater and surface flooding, which needs separate flood insurance. Most policies also require you to mitigate promptly, so delaying drying can reduce what you are paid. Photograph everything before anything is moved or torn out.
How long do I have before mould becomes a problem?
Mould can begin developing within 24 to 48 hours on wet porous materials such as drywall, carpet underlay and insulation. That is why restoration firms treat water damage as an emergency and why same-day extraction usually costs less overall than waiting — once mould is established you are paying for remediation on top of drying, typically an extra $1,100 to $3,400.
What is the difference between water categories 1, 2 and 3?
Category 1 is clean water from a supply line, tap or rainwater. Category 2, called grey water, comes from appliances such as washing machines and dishwashers, or a toilet overflow without solids. Category 3, black water, is sewage, ground flooding, or any water that has been standing long enough to grow bacteria — generally more than 48 hours. Categories degrade over time, so clean water left sitting becomes grey and then black, which is why the cost climbs the longer you wait.
Should I get more than one quote?
Yes — get at least three itemised quotes wherever the situation is not an active emergency. Ask each firm for the drying plan, the daily equipment count, whether they carry IICRC certification, and whether they bill your insurer directly. Be cautious of anyone who quotes a flat price without inspecting, asks for full payment upfront, or pressures you to sign an insurance assignment of benefits on the doorstep.