Mold remediation in New Jersey costs $500 to $1,500 for a small area under about 10 square feet in 2026, $1,000 to $3,500 for a patch of 10 to 50 square feet, and $2,000 to $8,000 for a whole basement. Call (201) 676-3099 or book a free estimate.
Mold remediation in New Jersey costs $500 to $1,500 for a small area under about 10 square feet in 2026, $1,000 to $3,500 for a patch of 10 to 50 square feet, and $2,000 to $8,000 for a whole basement. Big jobs — over 100 square feet, or mold that got into the ductwork — run $5,000 to $15,000 and up. The remediation is only half the bill, though. Fixing the water that caused it, and rebuilding what came out, are priced separately.
What does mold remediation cost in NJ in 2026?
Price is driven by square footage, how porous the materials are, whether the HVAC system moved spores around the house, and how much has to be cut out and rebuilt. A tiled bathroom wall is cheap. Carpet, insulation, paneling and a finished basement ceiling are not — porous material doesn't get cleaned, it gets removed.
| Job | Typical fixed-price range (NJ, 2026) |
|---|---|
| Small area, under about 10 sq ft | $500 – $1.5K |
| 10–50 sq ft: one wall, a closet, under a sink | $1K – $3.5K |
| Whole basement | $2K – $8K |
| Large job: 100+ sq ft, or mold in the HVAC system | $5K – $15K+ |
| Crawl space cleaned, dried and encapsulated | $4.3K – $9.6K |
| Air duct cleaning | $300 – $1K |
| Water damage drying, one to two rooms | $1.4K – $6.4K |
| Basement flood pump-out, extraction and drying | $500 – $9K |
| Sewage backup cleanup (Category 3 water) | $2K – $10K |
| Mold inspection with a few lab samples | $300 – $800 |
| Rebuild: drywall, per 4x8 sheet hung, taped and finished | $30 – $70 |
| Rebuild: a 12x12 room re-drywalled | $580 – $1.8K |
| Our minimum visit, covers up to 2 hours | $495 |
Is it mold, or just a stain?
- Mold is fuzzy or slimy, grows in patches, comes in black, green, gray or white, and smells musty.
- White, crumbly, crystal-looking powder on a block wall is efflorescence — mineral salt left by water passing through. It wipes off dry. Not mold, but proof water is coming through.
- A flat brown ring on a ceiling with no texture is usually an old stain from a leak that's been fixed.
- Soot near a furnace or fireplace is black and greasy, not fuzzy.
- Trust your nose. Musty in a closed-up basement in August with nothing visible usually means humidity plus mold you can't see yet — behind paneling, under carpet padding, inside a wall.
Do I need a mold test first?
Usually not. If you can see it, you know where the water came from, and it's a small area, testing mostly buys you a lab report that says what you already know. Spend the money on removing it and fixing the leak.
Testing is worth it in four situations: you're buying or selling a house and need something on paper; you're in a landlord-tenant dispute; someone in the house has symptoms and there's no visible growth; or you want a clearance test after a big remediation to confirm it's done.
One rule if you do test: get the testing from someone who isn't doing the removal. A company that both finds the problem and sells the cure has an obvious conflict. Independent inspections with a few lab samples run roughly $300 to $800 in New Jersey.
Does homeowners insurance cover mold in New Jersey?
Sometimes — and the dividing line is almost always sudden versus gradual. A pipe that bursts, a water heater that lets go, a washing machine hose that splits: that's a sudden, accidental discharge, and the resulting mold is usually covered. Many policies cap mold at a specific sublimit, so what's covered and what's paid can be two different numbers. Read yours.
What's normally not covered: a slow leak under a sink that ran for two years, humidity, condensation, seepage through a foundation wall, and deferred maintenance. Flooding from outside — a river, a storm surge, water coming across the ground — isn't covered by a standard policy at all; that needs separate flood insurance, which matters in shore and river towns.
If you might file: photograph everything before anything moves, keep the failed part, and save every invoice. We document with photos and write an itemized scope your adjuster can read. We won't pad a claim, and we can't promise what your policy pays.
What does real mold remediation look like?
A roof leak, a failed sump pump, a cracked foundation, a hidden supply line. Remediation without fixing the source is a bill you'll pay twice. That's where being a general contractor matters — we can fix the roof, the plumbing and the basement, not just the drywall.
Plastic containment, taped seams, a negative-air machine with HEPA filtration so spores don't travel to the rest of the house. The HVAC system gets shut down and returns get sealed.
Porous material — drywall, insulation, carpet, padding, ceiling tile, paneling — gets cut out and bagged, typically a foot or two past the visible growth. Framing and concrete get cleaned, not thrown away.
HEPA vacuum, wipe-down, and an EPA-registered antimicrobial on the surfaces that stay. Wire brushing or media blasting on heavy framing growth.
Dehumidifiers and air movers until a moisture meter says the framing is dry — not until it looks dry. This is the step cheap jobs skip, and it's why mold comes back.
Insulation, drywall, trim, paint, flooring. Same crew, same foreman, priced in writing before we start.
How do I check out a mold contractor in New Jersey?
Licensing rules for mold work differ by state and they change, so we're not going to tell you what New Jersey does or doesn't require this year — check the current rules with the New Jersey Division of Consumer Affairs before you hire. What you can always verify is everything else.
Ask for: a New Jersey Home Improvement Contractor registration you can look up; a certificate of general liability insurance sent straight from the agent, plus workers' comp; certifications such as IICRC or an ACAC credential for the inspector; a written scope naming containment and exactly what's being removed; and an independent clearance test on a big job.
Walk away from anyone who inspects for free, tests, and then sells you the remediation off the same clipboard — or who won't write down what they're removing.
Do I need a permit for mold work in New Jersey?
The removal itself usually isn't the permit question. The rebuild can be. Replacing framing, altering plumbing or electrical, or reconstructing a finished basement falls under the New Jersey Uniform Construction Code, and your town's construction office decides what needs a permit and an inspection. We check, we pull what's required, and we meet the inspector.
Same for the cause. A new sump pump circuit, a relocated discharge line or a replaced water heater usually needs its own permit — and doing it without one is what shows up later when you sell.
Where these numbers come from
2026 published pricing from New Jersey mold remediation and restoration companies serving Bergen, Passaic and Morris counties, national restoration cost guides, and our own 2026 quotes for remediation and the rebuild that follows.
Questions people ask next
Can I clean up mold myself?
A small patch on a hard surface — tile, glass, sealed wood — is a reasonable DIY job with gloves, an N95 and a detergent solution. The common industry cutoff is about 10 square feet. Past that, or anywhere it's in drywall, insulation or the HVAC, it needs containment so you're not spreading spores through the house.
Does bleach kill mold?
On hard, non-porous surfaces it works. On porous material like drywall or wood, the water in the bleach soaks in and the roots survive, so it looks clean and grows back. Professionals use EPA-registered antimicrobials and, more importantly, remove what can't be cleaned.
How long does mold remediation take?
A small area is a day. A whole basement is typically three to five days including drying time, and drying is what sets the schedule — you can't rush a moisture meter. The rebuild adds a few days to a couple of weeks depending on how much came out.
Will the mold come back?
Only if the water does. That's the whole game. Remediation without a fixed leak, a working sump, sealed foundation cracks and humidity under control is a temporary result, which is why we quote the cause and the cleanup together.
Is black mold more dangerous than other mold?
"Black mold" gets the headlines, but you can't identify a species by color, and the handling is the same either way: contain it, remove it, dry it, fix the water. Health questions belong with a doctor — we'll tell you what we found.
Do you handle the rebuild after remediation?
Yes, and that's the point of using one contractor. Insulation, drywall, trim, paint and flooring go back with the same crew and foreman who did the removal, on one written price.
Need mold and water damage cleanup near you?
If you searched “mold and water damage cleanup near me” anywhere in New Jersey, that's us. First Call Contracting is based in Paramus and sends its own licensed crew to all 21 counties — written price before work starts, no deposit, a real person on the phone 24/7.
Musty basement, or a leak that's been going a while?
Free in-home inspection with photos, an itemized written price, and one crew for the water, the mold and the rebuild. See our Mold & Water Damage page for the full process.
Or call Alex direct: (201) 676-3099