Mold remediation cost
Professional mold remediation typically costs $1,223 to $3,758, averaging about $2,369, according to Angi (updated July 9, 2026). Fixr (August 29, 2025) puts most jobs at $1,500 to $9,000, averaging $3,500. HomeGuide (February 5, 2026) lists about $15–$30 per square foot of affected area, or roughly $1,500 to $6,000 for an average project. Size, location, containment and whether HVAC is involved drive the total—use the estimator below with your own quotes. Fix the moisture source first or mold will return.
Published cost ranges
These are national ranges as each source publishes them. None of them are our own prices.
| Source (date) | Typical project | Notes |
|---|---|---|
| Angi (updated Jul 9, 2026) | $1,223–$3,758 | Average about $2,369; ~$10–$25/SF |
| Fixr (updated Aug 29, 2025) | $1,500–$9,000 | Average $3,500; about $10–$30/SF |
| HomeGuide (Feb 5, 2026) | $1,500–$6,000 | $15–$30/SF; whole home $15,000–$30,000 |
By affected area size (HomeGuide)
| Area size | Square feet | Average cost |
|---|---|---|
| Small | 10–100 | $500–$1,500 |
| Medium | 100–300 | $1,500–$6,000 |
| Large | 300–1,000 | $6,000–$15,000 |
| Very large / whole home | >1,000 | $15,000–$30,000 |
Fixr’s size samples (Aug 29, 2025): 50 SF $500–$1,500; 100 SF $1,000–$3,000; 200 SF $2,000–$6,000; 500 SF $5,000–$15,000.
By location in the home
| Location | Angi | HomeGuide |
|---|---|---|
| Bathroom | $500–$1,000 | $500–$2,000 |
| Basement (partial) | $500–$3,000 | $1,500–$6,000 |
| Attic | $1,000–$4,000 | $1,500–$6,000 partial |
| Crawl space | $500–$2,000 | $1,500–$4,000 |
| HVAC / ducts | $3,000–$10,000 | $2,000–$10,000 |
| Whole house | $10,000–$30,000 | $15,000–$30,000 |
Fixr’s HVAC band matches Angi at $3,000–$10,000; Angi lists separate air-duct cleaning at about $600–$2,000 when ducts alone are treated. The EPA advises not to run an HVAC system you know or suspect is contaminated with mold.
Estimate your own job
Choose a HomeGuide size band (or price by square foot), then add testing, inspection, HVAC remediation or air scrubbers. Override any line with your quote. This mold remediation cost calculator is for planning only—rebuild of drywall, carpet and paint is often separate.
What's in the price
- Assessment and containment: Pros seal the work area (plastic, negative air) so spores don’t spread. Fixr notes containment labor around $75–$120/hour plus modest equipment costs.
- Cleaning and removal: HEPA vacuuming, antimicrobial cleaners, and cutting out porous materials (drywall, carpet, insulation) that can’t be cleaned.
- Air cleaning: Fixr cites air scrubbers/HEPA starting about $500–$1,000.
- Testing / inspection: Angi testing $250–$350; HomeGuide inspection $300–$650.
- HVAC: Angi/Fixr $3,000–$10,000 when the system or ducts are involved.
- Often extra: drywall, carpet and paint rebuild; disposal fees; fixing the leak or humidity source.
- Fix moisture first: EPA and CDC both stress that mold returns if leaks, humidity above about 50%, or floods aren’t dried within 24–48 hours. Remediation without a moisture fix is temporary.
- DIY size limit: EPA: under about 10 square feet, many homeowners can clean hard surfaces themselves with detergent, PPE and ventilation—after fixing the water source. Larger areas, sewage, or HVAC involvement → hire a remediation pro.
- Who should not clean: CDC advises people with mold allergies, asthma/COPD, immune suppression or lung disease not to do cleanup. Use at least an N95, gloves and sealed goggles if you do small DIY work. Never mix bleach with ammonia.
- “Black mold” without the scare: Dark growth is common; you usually don’t need a species ID to clean it (CDC). Color alone doesn’t prove toxicity. Large, hidden or HVAC-related growth still deserves a professional scope—not alarmist marketing.
- HVAC: EPA: do not run a system you know or suspect is moldy—it can spread spores. See EPA’s duct-cleaning guidance before authorizing duct work.
- Insurance: Sudden covered water damage may help; gradual leaks and floods often don’t. Confirm coverage before you sign a contract.
Getting quotes
- Get at least three written estimates that list contaminated square footage, containment, what will be removed, disposal, testing and whether rebuild is included.
- Ask about IICRC or similar remediation credentials, insurance and (where required) state licensing.
- Prefer an independent inspector if you need a report for an insurer or a home sale—some remediators include or waive inspection when they also do the work (Fixr).
- Related water and finish work: bathroom remodel cost, water heater replacement cost, tankless water heater cost, termite treatment cost (moisture and wood damage often travel together), foundation repair cost (wet basements and crawl spaces), pest control cost and the cost guides.
FAQ
How much does mold remediation cost?
Angi (updated July 9, 2026) puts most professional jobs at $1,223 to $3,758, averaging about $2,369. Fixr (August 29, 2025) lists $1,500 to $9,000, averaging $3,500. HomeGuide (February 5, 2026) puts a typical project at about $1,500 to $6,000, or roughly $15–$30 per square foot of affected area.
How much does mold remediation cost per square foot?
Angi cites about $10–$25 per square foot of contaminated surface. HomeGuide lists $15–$30/SF. Fixr’s wider band is about $10–$30/SF. Small jobs often hit a contractor minimum, so the effective per-foot rate can be higher on tiny patches.
Do I need testing before mold remediation?
Not always. The EPA says that if mold is visible, sampling is usually unnecessary, and no federal limits exist for mold spores in air. Angi budgets about $250–$350 for testing; HomeGuide puts a home inspection at about $300–$650; Fixr cites about $450–$800 for inspection. Testing is more useful for hidden mold, clearance after a big job, or when an insurer or state requires documentation.
Can I remove mold myself?
The EPA says that if the moldy area is less than about 10 square feet (roughly a 3×3 ft patch), you can often clean it yourself after you fix the moisture source—using detergent and water on hard surfaces, PPE, and good ventilation. Call a pro for larger areas, sewage/contaminated water, suspected HVAC contamination, or if you have health concerns. The CDC advises people with allergies, asthma/COPD, immune suppression or lung disease not to do mold cleanup themselves.
Is “black mold” more expensive or more dangerous?
HomeGuide lists black mold (Stachybotrys) remediation at about $2,000–$10,000 because of extra PPE and handling—not because every dark patch is automatically “toxic black mold.” The CDC says you do not need to know the mold type to clean it up; if mold is growing, fix moisture and remove the growth. Color alone is a poor toxicity test—avoid scare tactics and get a written scope from a remediation pro when the area is large or hidden.
Does homeowners insurance cover mold remediation?
Often only when mold follows a sudden covered water event (for example a burst pipe), and many policies limit or exclude mold. HomeGuide notes flood-related mold often needs flood coverage. Read your policy and call your insurer before work starts.
Sources
All checked October 26, 2026. Dates are each page's own published or updated date.
- Angi, Mold remediation cost, updated July 9, 2026: project range and average, $/SF, location bands, testing, HVAC, ducts.
- HomeGuide, Mold removal cost, February 5, 2026: $/SF, size-band table, location bands, inspection, black mold band, DIY <10 SF note, insurance note.
- Fixr, Mold remediation cost, updated August 29, 2025: national average and range, $/SF size samples, HVAC, inspection, air scrubbers, containment labor.
- US EPA, A Brief Guide to Mold, Moisture and Your Home; Mold Cleanup in Your Home (DIY <~10 SF; HVAC caution).
- CDC, Mold clean-up guidelines; Mold overview (who should not clean; humidity ≤50%; no need to ID species to clean).