Mold Remediation Cost Calculator
Get a city-specific cost estimate based on your room type, affected area, and severity. Updated with contractor rate data across 516 US cities.
1. Where is the mold?
2. How large is the affected area?
3. What type of space?
4. How severe is it?
Select your state and city above to see your cost estimate.
What affects mold remediation cost?
Four factors drive the final price on any mold job:
- Area size — The EPA's 10 sq ft rule is the DIY threshold. Professional jobs typically start around $500 for small patches and scale up proportionally for larger infestations.
- Room type and accessibility — Crawl spaces and attics require specialized equipment, confined-space protocols, and longer labor hours. HVAC system contamination is the most expensive because ductwork runs throughout the home.
- Severity and material penetration — Surface mold on tile or painted walls can be cleaned. Mold that has penetrated drywall paper, wood framing, or insulation requires removal and replacement of those materials.
- Local labor rates — Contractor costs vary significantly by city. Markets like New York, San Francisco, and Boston run 40–60% above national averages. Smaller cities in the South and Midwest tend to be lower.
Average mold removal cost by room type
| Room type | Typical range | Why it varies |
|---|---|---|
| Bathroom | $500 – $2,500 | High humidity, tile surfaces — often surface-level |
| Basement | $1,500 – $5,000 | Large area, often structural — sump/drainage issues |
| Crawl space | $2,000 – $8,000 | Confined access, vapor barrier replacement often needed |
| Attic | $1,500 – $6,000 | Sheathing replacement common, ventilation fix required |
| HVAC / Ductwork | $3,000 – $10,000 | Whole-home contamination risk, specialized equipment |
| Kitchen | $500 – $2,000 | Usually behind cabinets or under sink — smaller scope |
| Bedroom / Living room | $500 – $3,000 | Typically drywall or window-related |
National averages. Use the calculator above for city-adjusted estimates.
How to use this estimate
The estimate above is based on local contractor rate data for your city, adjusted for area size, room type, and severity. Use it as a baseline when getting quotes — not as a final price.
Before contacting contractors:
- Find and fix the moisture source first — remediation without fixing the cause will fail
- Don't disturb the mold before an inspection — spreading spores increases scope and cost
- Get at least 2–3 quotes — prices vary significantly between contractors
- Ask each contractor what the quote includes: containment, air scrubbing, disposal, post-clearance testing
- Check IICRC certification — the industry standard for mold remediation
Will insurance cover it?
Homeowners insurance may cover mold remediation — but only if the mold resulted from a covered event like a burst pipe. Gradual leaks, flooding, and neglect are typically excluded. Use our insurance coverage checker to evaluate your situation before filing a claim.
Frequently asked questions
How accurate is this estimate? ▼
The estimate is based on local contractor rate data calibrated to 516 US cities, adjusted for room type, area size, and severity. It's accurate within ±30% for most situations. Unusual cases (historic homes, hazmat-level contamination, high-rise buildings) may fall outside the range.
What is not included in the estimate? ▼
The estimate covers remediation labor and materials only. It does not include: post-remediation air quality testing ($200–$500), structural repairs after mold removal, fixing the underlying moisture source (plumbing repairs, roof repairs), or temporary lodging during remediation.
Should I get mold testing before remediation? ▼
Not always. If mold is visibly present, most contractors can assess scope without air testing. Pre-remediation testing is most useful when you smell mold but can't see it, or need documentation for insurance or legal purposes. Post-remediation clearance testing is more important — it verifies the job was done correctly.