Key takeaways
- Short answer: Most mold companies price by job size rather than a strict per-square-foot rate.
- Under 10 sq ft: $500–$1,500
- 10–100 sq ft: $1,500–$5,000
- Over 100 sq ft: $5,000–$15,000+
- Typical mold remediation cost: $1,500–$5,000 for a typical home.
Mold remediation cost by area
| Affected area | Typical cost | Notes |
|---|---|---|
| Under ~10 sq ft | $500–$1,500 | Often DIY-able if moisture is fixed |
| 10–100 sq ft | $1,500–$5,000 | Containment and HEPA filtration |
| Over 100 sq ft | $5,000–$15,000+ | Multiple rooms or structural materials |
Cost by location in the home
| Location | Typical cost |
|---|---|
| Bathroom walls or ceiling | $500–$3,000 |
| Under sink or behind appliances | $500–$2,500 |
| Crawl space | $1,500–$7,000 |
| Attic | $2,000–$8,000+ |
| Finished basement | $2,500–$15,000+ |
| HVAC ducts or air handler | Adds $1,000–$5,000+ |
Why per-square-foot quotes are misleading
Containment, air scrubbers, removal of drywall or insulation, and clearance testing cost roughly the same whether the patch is 20 or 40 square feet, so small jobs carry a high effective per-square-foot price. Compare total, itemized quotes instead.
Under about 10 sq ft on a hard surface? EPA guidance says you can usually clean it yourself once the moisture problem is fixed. See can I remove mold myself?
Related questions
How much does mold testing add?
An independent assessment and clearance test typically costs $300–$1,200.
Does insurance pay for mold remediation?
Only when mold results from a covered sudden water event, and many policies cap mold coverage.
Why is attic mold so expensive?
Attics often need large areas of sheathing treated plus ventilation or roof-leak fixes, and access is difficult.
Other mold remediation questions homeowners ask
How much does mold remediation cost?
A typical home remediation costs about $1,500–$5,000. Small areas under about 10 square feet often cost $500–$1,500, or can be cleaned yourself.
How much does a mold inspection cost?
A mold inspection commonly costs a few hundred dollars, and more when lab samples are taken. Hire an inspector who does not also do the remediation.
Is black mold more dangerous than other mold?
Color does not tell you how harmful mold is. Any mold can trigger allergy and asthma symptoms, so remove it and fix the moisture either way.
Mold Remediation at a glance
Timeline
Most remediation jobs take 1–5 days, plus time to fix the moisture source.
Permits
Remediation rarely needs a building permit, but a few states license mold assessors and remediators.
DIY or pro?
EPA guidance says areas under about 10 square feet can be cleaned yourself. Larger areas, HVAC mold or sewage-related growth need a pro.
What mold remediation costs
Mold remediation typically costs $1,500–$5,000 for a typical home. Small patches under 10 sq ft run $500–$1,500, while large areas over 100 sq ft cost $5,000–$15,000 or more. Rebuild costs are extra.
Keep reading
Sources: InspectAndTest — Mold remediation cost · U.S. EPA — Mold cleanup in your home. Ranges are rounded estimates; see our editorial policy.