Don’t get ripped off. National average pricing for mold removal in attics, basements, and crawl spaces.
Typical range: $15 – $30 per square foot
1. Costs by Room
Accessibility is the biggest factor. A moldy wall in a bedroom is cheap to fix; a moldy roof deck in a tight attic is expensive.
| Location | Typical Price Range | Why it costs more |
|---|---|---|
| Attic | $1,500 – $6,000 | Difficult access. Often requires “Ice Blasting” to save the wood. |
| Crawl Space | $2,000 – $8,000 | Hazmat gear required (tight space). Often includes encapsulation. |
| Basement | $1,500 – $4,000 | Usually involves removing drywall and treating concrete. |
| HVAC / Ducts | $500 – $2,000 | Specialized equipment needed to clean coils and trunks. |
| Bathroom | $500 – $1,500 | Small area, but often requires removing the vanity or tub. |
2. Costs by Method
Not all “cleaning” is equal. Wiping a surface is cheap; blasting it with dry ice pellets is expensive but more effective.
- Chemical Fogging ($): $400 – $800. Warning: Does not remove roots. Often temporary.
- Wire Brushing/Sanding ($$): $1,000 – $3,000. Physical removal. Good for small areas.
- Dry Ice Blasting ($$$): $3,000 – $8,000. Uses compressed air and CO2 pellets. The Gold Standard for wood framing.
3. Where Does the Money Go?
Homeowners often ask: “Why is it $3,000? It’s just bleach and water!” (It’s not). You are paying for engineering controls to prevent the mold from spreading to the rest of the house.
Heavy-duty 6-mil plastic chambers to seal off the work zone. Zipper doors. Tape seals.
Negative Air Machines (Scrubbers) run 24/7 to filter the air. Dehumidifiers dry the structure.
Technicians wear full Tyvek suits and respirators. It is hot, dangerous, manual labor.
Moldy drywall cannot be tossed in a regular bin. It requires hazardous waste disposal fees.
4. The “Hidden” Costs (Reconstruction)
Important: Most remediation quotes do NOT include putting the house back together.
The remediation company’s job is to remove the damage (Demolition). You will likely need to hire a separate contractor to:
- Hang new drywall and paint.
- Install new carpet/flooring.
- Replace insulation.
Budget an additional 50% of the remediation cost for reconstruction.
5. Avoiding the “Low Bid” Scam
If a contractor quotes you under $800 for a whole-house treatment, they are likely just “Fogging.”
Fogging sprays a chemical into the air that settles on surfaces. It kills airborne spores temporarily but does not remove the source inside the walls. The mold will return in 3-6 months. Real remediation requires physical removal.