Water Damage Cost Estimator
Estimate the total cost of water damage restoration based on affected area, damage category, water class, and material types involved.
Formula
Total Cost = (Extraction & Drying + Equipment + Flooring + Drywall + Mold + Contents) × 1.20
- Extraction & Drying = Area (sq ft) × Category Base Rate × Class Multiplier
- Category Base Rates: Cat 1 = $3.75/sq ft | Cat 2 = $6.50/sq ft | Cat 3 = $10.00/sq ft
- Class Multipliers: Class 1 = 1.0× | Class 2 = 1.35× | Class 3 = 1.75× | Class 4 = 2.10×
- Equipment = ⌈Area ÷ 150⌉ units × Drying Days × $75/day (Class 1=3d, 2=5d, 3=7d, 4=10d)
- Flooring: Carpet $4.50 | Hardwood $12.00 | Tile $7.00 | Concrete $1.50 per sq ft
- Drywall: Estimated perimeter (4√Area) × height (4 ft partial / 8 ft full) × $2.50/sq ft
- Mold: Minor = max($500, $2/sq ft) | Extensive = max($2,000, $6/sq ft)
- Contents: Minor = $500 flat | Significant = $2,500 flat
- Overhead & Profit: 20% applied to subtotal
Assumptions & References
- Water damage categories (1–3) and classes (1–4) follow IICRC S500 Standard for Professional Water Damage Restoration.
- Base extraction and drying rates sourced from HomeAdvisor and Angi national cost data (2023–2024 averages: $1,300–$5,600 for typical residential claims).
- Flooring replacement costs based on RSMeans residential cost data and national contractor averages.
- Mold remediation costs aligned with EPA mold remediation guidelines and industry averages ($500–$30,000 depending on scope).
- Equipment rental rates (~$75/unit/day) reflect industry-standard dehumidifier and air mover pricing.
- Perimeter is approximated as 4√(area), assuming a roughly square room layout.
- A ±20% range reflects regional labor cost variation, contractor markup differences, and material price fluctuations.
- This estimate does not include insurance deductibles, permit fees, temporary housing, or structural engineering assessments.
- Category 1, Class 1 flooring applies a 40% cost factor assuming partial salvageability with rapid response.
- Always obtain multiple contractor quotes; costs vary significantly by geography and damage severity.