Home → Restoration → Mold Remediation

MOLD REMEDIATION
ON LONG ISLAND, NY

NYS-licensed mold remediation using independent mold assessment and clearance testing. We remove mold-contaminated materials, correct moisture problems, and restore affected areas throughout Long Island.

📞 Call 24/7: (631) 532-7346 Request a Free Remediation Estimate →

Protect Your Family
From Mold

Call for a professional mold consultation, or send us the details below and we'll call you back, usually the same day.

  • NYS DOL licensed and insured
  • 24/7 emergency response, water, fire, mold and storm
  • IICRC-certified technicians
  • Photos and documentation available for insurance claims
  • Serving all of Nassau and Suffolk County, from Great Neck to Montauk
⭐ 5-Star Rated on Google
📞 Call 24/7: (631) 532-7346

Request a Free Estimate

We'll only use this information to respond to your mold inquiry. We don't sell your information to third parties.

✅ IICRC Certified
🪪 Licensed & Insured
🔬 Independent Air Testing
☎️ 24/7 Emergency Response
🗺️ All of Long Island
What To Expect

What Happens When You Call

1

We answer

Tell us what you're seeing and where. If there's active water intrusion, we'll talk you through what to do until we arrive.

2

We schedule a free on-site visit

Often same-day. We walk the property, photograph what we find, and coordinate an independent mold assessor if your project requires one.

3

You get a written plan

A clear scope and price before any work starts, with photos and documentation you can hand to your insurance company.

Mold Remediation Services

Licensed Mold Removal in Suffolk and Nassau County

Mold is more than a cosmetic problem. Indoor mold can affect air quality and may cause allergic reactions, respiratory irritation, or asthma symptoms in sensitive individuals, and it's a sign of underlying moisture issues in your home. Long Island's humid climate makes homes especially vulnerable to mold growth, particularly after water damage events, in poorly ventilated attics and crawl spaces, and in basements.

Greene Group Construction Corp. is licensed by the New York State Department of Labor for mold remediation. New York law (Labor Law Article 32) requires mold assessment and mold remediation to be handled by separate, independent companies on projects above a minimum size, and we work within that structure on every project that requires it. We do not clear our own work.

NYS Department of Labor Licensed Mold Remediation Contractor, License No. [ADD LICENSE NUMBER HERE] (see the NYS Mold Program). You can verify any contractor's mold license status directly with the New York State Department of Labor.

Our certified mold remediation specialists follow industry-standard IICRC S520 protocols for safe, effective mold removal. We don't just clean the surface. We remove mold-contaminated materials and address the moisture conditions contributing to mold growth, clean and treat affected surfaces according to the remediation plan and applicable industry standards, and verify removal with post-remediation clearance testing performed by an independent assessor. Remediation takes affected materials out rather than putting them back, and when the affected room is a bathroom our guide to rebuilding a bathroom after a leak or flood covers the rebuild that follows and the mold sublimits many homeowners policies carry.

We remove all types of mold including black mold (Stachybotrys), Aspergillus, Penicillium, Cladosporium, and other species commonly found in Long Island homes. Our contained remediation process prevents cross-contamination to unaffected areas during removal.

⚠️ Mold Health Risks

Mold exposure may cause allergic reactions, respiratory irritation and aggravated asthma symptoms in sensitive individuals. The color or appearance of mold cannot reliably determine its type or potential health effects. Significant indoor mold growth should be evaluated by a qualified professional. If you suspect mold in your home, call Greene Group at (631) 532-7346.

Attic, Basement and Water-Damage Mold Removal:

  • Coordination With an Independent Mold Assessor
  • Independent Air-Quality Testing Coordination
  • Black Mold Removal
  • Attic Mold Remediation
  • Basement Mold Removal
  • Crawl Space Treatment
  • Containment Setup
  • HEPA Air Filtration
  • Anti-Microbial Treatment
  • Material Removal
  • Independent Clearance Testing
  • Clearance Documentation

Signs You May Need Mold Remediation:

  • Musty or earthy odor indoors
  • Visible dark spots on walls or ceilings
  • Recent water damage or flooding
  • Increased allergy or respiratory symptoms
  • Peeling paint or wallpaper
  • Warped or discolored drywall
How It Works

Our Mold Remediation Process

New York law requires mold assessment and remediation to be handled by two independent companies. Here's how that plays out on an actual project, start to finish.

1

Review the assessment

Before any work begins, we review the remediation plan prepared by an independent, NYS-licensed mold assessor, a company separate from Greene Group, as New York law requires.

2

Correct the moisture source

Mold returns if the underlying problem isn't fixed. We identify and address the roof leak, plumbing failure, flooding or ventilation issue driving the growth.

3

Set up containment

The affected area is isolated with poly barriers to stop spores from spreading to the rest of the home during removal.

4

Establish negative air pressure

HEPA-filtered air scrubbers run for the duration of the job to capture airborne particles and hold the containment zone under negative pressure.

5

Remove damaged materials

Contaminated drywall, insulation and other unsalvageable materials are removed and disposed of per protocol, not cleaned and left in place.

6

HEPA clean and treat

Remaining surfaces are HEPA vacuumed, wiped down and cleaned and treated according to the remediation plan and applicable industry standards.

7

Independent clearance testing

The same independent, licensed mold assessor returns to inspect and test the area before containment comes down. We don't clear our own work.

8

Reconstruction

Once you have a passed clearance report, we rebuild (drywall, insulation, ceilings and finishes) so you're not left coordinating a second contractor.

Note: New York's assessor/remediator separation requirement applies above a minimum project size set by Labor Law Article 32. Ask us where your project falls before work begins.

Photo Documentation

Recent Long Island Mold Remediation Projects

These photos show actual water and mold damage found in Long Island homes: collapsed ceilings, saturated insulation, and heavily mold-covered structural joists.

Ceiling collapse from water and mold damage
Ceiling Collapse
Saturated insulation with black mold
Mold-Saturated Insulation
Exposed ceiling joists with mold damage
Structural Joist Damage
Black mold growth on ceiling joists
Black Mold Growth
Severe mold on roof decking
Roof Deck Contamination

Recent project: Hampton Bays, NY, April 2026. A roof leak had gone undetected long enough to grow mold in the attic. We removed the contaminated materials, addressed the moisture source, and cleared the project with an independent NYS-licensed mold assessor before reconstruction.

✕ Close ‹ ›
Common Questions

Frequently Asked Questions About Mold Removal

Does homeowners insurance cover mold remediation?

It depends on the cause. Mold from a sudden covered water event such as a burst pipe is often covered, though many Long Island policies carry a mold sublimit of five to ten thousand dollars. Mold from long-term humidity, poor ventilation, or deferred maintenance is typically excluded. Documenting the water source early is what determines coverage.

Can I remove mold myself with bleach?

Bleach is not effective on porous materials. It lightens surface staining while the mold structure survives beneath, and the water content can feed further growth. The EPA suggests homeowners may handle areas under roughly ten square feet. Anything larger, anything involving HVAC, or any mold following a sewage event needs professional containment.

How long does mold remediation take?

Most residential projects run three to seven days, covering containment, removal of affected materials, HEPA filtration and cleaning, anti-microbial treatment, and drying. Post-remediation clearance testing adds another two to three days for lab results before reconstruction starts.

Do you test for mold before remediation?

Greene Group performs mold remediation, not the independent mold assessment on the same project. When testing or a written remediation plan is required, we coordinate with a separate NYS-licensed mold assessor. That independent assessor can also perform post-remediation clearance testing.

Is black mold more dangerous than other mold?

Some molds, including Stachybotrys chartarum, may produce mycotoxins under certain conditions, but mold cannot be reliably identified or evaluated by color alone.

Why does mold keep coming back after removal?

Because the moisture source was never corrected. Mold is a symptom, not the root problem. Recurring attic mold on Long Island usually traces to inadequate ventilation or a roof leak; recurring basement mold to hydrostatic moisture or humidity. We correct the source as part of the remediation.

Where We Work

Mold Remediation Across Nassau and Suffolk County

We provide mold remediation throughout Nassau and Suffolk County, including Quogue, Hampton Bays, Southampton, East Hampton, Sag Harbor, Riverhead and Great Neck. Don't see your town? Call us. We cover all of Long Island.

Also Consider

Related Restoration Services

💧

Water Damage Restoration

Mold always follows water. Stop the source first with 24/7 emergency extraction and structural drying.

Details →
🔥

Fire Damage Restoration

Fire suppression water left untreated leads to mold. We prevent it during the restoration process.

Details →
⛈️

Storm Damage Restoration

Storm water intrusion through roofs and windows is a leading cause of Long Island attic mold.

Details →
💰

Mold Remediation Cost Guide

Long Island pricing by area size: attic, basement, and whole-home remediation costs.

Details →
📋

Water Damage Insurance Claims

If mold came from a covered water event, remediation may be fully covered by your policy.

Details →
🏠

All Restoration Services

See the full range of damage restoration services Greene Group provides on Long Island.

Details →
📞 Call 24/7: (631) 532-7346