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Mold RemediationMold Remediation Cost Calculator — What a Full Containment Job Costs
Remediation is the whole project, not a wipe-down: sealed containment, negative air pressure, HEPA filtration, bagged disposal, and an independent clearance test at the end. Enter the contaminated area and the rate a remediation firm quotes to see what that scope of work costs.
Full-scope mold remediation runs about $15–$30 per square foot of contaminated area — $25–$35 where black mold or HVAC contamination forces full containment — plus $250–$700 for the post-remediation clearance test. A 200 sq ft containment job at $24/sq ft lands near $5,400, realistically $4,300–$7,600. An isolated area under 100 sq ft usually comes in at $1,200–$3,000; whole-house remediation runs $10,000–$30,000.
How this calculator works
We multiply the contaminated area by the rate a remediation contractor quotes, then add the flat line for setting up containment and paying for the post-remediation clearance test. Remediation prices higher and swings wider than a plain cleanup line item because the crew is also building sealed barriers, running negative-air machines and HEPA scrubbers for the duration, treating what stays in place, and documenting that the air came back clean. Demolition, rebuild, and the moisture repair that caused the problem are quoted separately.
What changes the number
- EPA guidance splits jobs by contaminated area — under 10 sq ft is homeowner scale, 10–100 sq ft is an isolated area needing limited containment, and over 100 contiguous sq ft is extensive contamination that needs full containment. The table below follows those tiers.
- Containment is the line item homeowners do not expect: poly barriers, a zippered airlock, negative-air machines, and HEPA scrubbers are rented by the day, so a slow small job can cost as much as a fast large one.
- The post-remediation clearance test by an independent hygienist runs about $250–$700. It is what closes the job out — skip it and you have no documented proof the air is clear.
- Most remediation firms carry a $500–$1,000 minimum charge, so a 15 sq ft patch rarely costs 15 times the per-square-foot rate.
- Demolition and rebuild are a separate trade. Remediation gets the mold out; a carpenter puts the wall, flooring, and trim back.
- The moisture source repair — plumbing, roof, grading, or ventilation — is its own invoice, and skipping it means paying for remediation twice.
Remediation scope and cost by contaminated area
| Contaminated area | Containment used | Who handles it | Typical all-in cost |
|---|---|---|---|
| Under 10 sq ft | None — dust control, N-95 respirator, gloves, eye protection | Homeowner, per EPA guidance | $50–$150 in supplies |
| 10–30 sq ft (about one drywall panel) | Poly sheeting over the work area, HEPA vacuum | Homeowner, or a pro at their minimum charge | $500–$1,200 |
| 30–100 sq ft (several panels) | Sealed barrier, vents taped off, HEPA air scrubber | Professional | $1,200–$3,000 |
| Over 100 contiguous sq ft | Full containment, negative air pressure, decon airlock | Professional; clearance test strongly advised | $3,000–$8,000 |
| HVAC system involved | System shut down, containment at the air handler | Professional only | $2,000–$6,000 |
| Whole house / multiple rooms | Staged containment, room by room | Professional; occupants often relocate | $10,000–$30,000 |
Frequently asked questions
How much does whole-house mold remediation cost?
Whole-house remediation typically runs $10,000–$30,000, because containment has to be staged room by room, the HVAC system is almost always involved, and occupants usually relocate for part of the work. Most residential jobs are far smaller — an isolated area under 100 sq ft lands at $1,200–$3,000.
What does the containment line on a remediation quote pay for?
Poly barriers taped floor to ceiling, a zippered airlock at the entry, HVAC vents sealed off, one or more negative-air machines exhausted outside, and HEPA scrubbers running for the duration of the job. That equipment is rented by the day, which is why a slow 60 sq ft job can cost as much as a fast 150 sq ft one.
Do I need a clearance test after mold remediation?
For anything over about 100 sq ft, for black mold, and for any insurance claim — yes. An independent hygienist samples the air once containment comes down and issues a pass or fail, which is the only documented proof the work succeeded. Budget $250–$700, and have the test done by someone other than the remediation contractor.
How long does mold remediation take?
A contained single-room job is usually 1–3 days of work plus 1–2 days of drying. Jobs over 100 sq ft, or with demolition and HVAC involved, run 3–7 days. The clearance test adds a day or two for lab results before rebuild can start.
Is mold remediation covered by insurance?
Sometimes. If the mold followed a sudden, covered event such as a burst pipe it is often covered, usually with a cap of $1,000–$10,000. Mold from long-term leaks or humidity is normally excluded. Use our mold insurance claim calculator to weigh whether filing is worth it.