Black Mold Removal Cost Calculator
Black mold removal cost runs about $1,200–$3,800 for a typical job, or roughly $10–$30 per square foot — but your actual price depends heavily on where the mold is, how bad it is, and where you live. Instead of a one-size-fits-all number, the calculator below builds a tailored range from your specific situation, using current 2026 remediation pricing.
Estimate your removal cost
Answer five quick questions for a tailored price range.
Estimated cost for bathroom (30 sq ft)
$850–$1,250
Based on $18–$28/sq ft for this location & severity. This is an estimate, not a quote.
How we got there
- Affected area
- 30 sq ft
- Remediation rate
- $18.0–$28.0/sq ft
- Inspection / testing
- +$300–$400
Estimates use current national and regional remediation pricing. Actual costs depend on your home, mold type, and contractor. Always get a professional inspection for severe or hidden mold.
How black mold removal is priced
Remediation contractors price jobs by the size of the affected area, the materials involved, and how hard the mold is to reach and contain. Most quote somewhere between $10 and $30 per square foot, which already bundles labor, containment, protective equipment, HEPA filtration, cleaning agents, and disposal. Light surface cleaning of non-porous areas can be cheaper (around $2–$8/sq ft), while severe or hidden mold sits at the top of the range or beyond.
Average black mold removal cost by location
Where the mold is changes the price more than almost anything else, because access and the materials involved differ room to room:
| Location | Typical cost | Can reach |
|---|---|---|
| Bathroom | $500–$2,000 | $8,000+ (behind walls) |
| Drywall / walls | $1,000–$4,000 | $10,000+ |
| Basement | $1,500–$6,000 | $15,000 |
| Attic | $1,500–$6,000 | $15,000 |
| Crawl space | $2,000–$6,000 | $15,000 |
| HVAC / ductwork | $3,000–$7,000 | $10,000+ |
| Whole house | $10,000–$30,000 | $30,000+ |
What drives your price up or down
- Size of the area. The biggest factor. A 5 sq ft patch may hit a contractor's minimum (~$450–$600); a whole room scales with square footage.
- Severity and mold type. Heavy or toxic growth needs more containment and disposal.
- Porous vs. non-porous materials. Tile wipes clean; soaked drywall, carpet, and insulation must be cut out and replaced.
- Accessibility. Crawl spaces, attics, and ductwork cost more because they're harder to work in.
- Reconstruction. Rebuilding walls, flooring, or insulation after removal adds $8–$20 per square foot.
- Your region. Labor in Northeast and West Coast metros can run 25% above the national average; much of the South and Midwest runs below it.
DIY vs. professional: the cost trade-off
For a small, simple patch under ~10 sq ft, DIY supplies (respirator, gloves, mold cleaner or vinegar, plastic sheeting) run $30–$150 — a fraction of a pro visit. But DIY only makes sense when the cause is straightforward and the area is small. Paying $1,500 for a pro to properly contain and remove mold you can't fully reach is cheaper than redoing a failed DIY job twice and still ending up with regrowth. Our full cost guide breaks the math down further.
How this calculator works
The estimator multiplies a per-square-foot remediation rate (set by the severity you choose) by a location factor and a regional cost multiplier, then adds optional inspection and reconstruction costs and applies a realistic minimum job fee. The coefficients come from published 2026 pricing data, including:
- Angi — Mold Remediation Cost (2026)
- HomeGuide — Mold Removal Cost (2026)
- This Old House — Mold Remediation Cost (2026)
- EPA — Mold Cleanup in Your Home
It returns an honest range rather than a single number, because real quotes vary with details no calculator can see. Treat the result as a budgeting tool and a sanity check on contractor quotes — not a binding price.