NYLMB · IICRC · Since 2012
(631) 625-8807
Long Island Mold Co. logo

Suffolk County Remediation

Black Mold Removal in Suffolk County, NY

NYLMB-licensed assessment and IICRC S520-certified remediation serving all of Suffolk County — from Huntington and Smithtown to Bay Shore, Patchogue, and the East End. Fixed-price quotes after the site visit. No hourly billing.

NYLMB MR00612
IICRC S520 Certified
Same-week scheduling
Request Free Suffolk Inspection (631) 625-8807

Free Suffolk Inspection

Same-week callback.

Fixed-price quote after the site visit. Insurance-friendly documentation.

We call within 1 business hour. NYLMB-licensed · IICRC certified · Insurance-friendly.

NYLMB Licensed · MA00534 / MR00612
IICRC CMR & AMRT Certified
4.9★ · 187+ Google Reviews
EPA RRP Lead-Safe
Since 2012 · 2,800+ Homes

Suffolk County Overview

Why Suffolk County homes have unique black mold risk factors

Suffolk County’s mold profile differs from Nassau in three important ways. First, Suffolk’s larger lots and older septic systems create persistent soil saturation conditions that push moisture into basement walls and crawlspaces for weeks after heavy rain. Second, the South Shore towns — Bay Shore, West Islip, Babylon, Lindenhurst, Patchogue — are still working through Hurricane Sandy legacy moisture in wall cavities and sub-slab areas, over a decade after the storm. Third, Suffolk’s 1950s and 1960s housing stock in Huntington, Smithtown, and Commack was built with bathroom exhaust fans ducted into the attic rather than through the roof — standard practice at the time, and now the #1 driver of attic mold in Suffolk County.

The term “black mold” most often refers to Stachybotrys chartarum, but visual identification is unreliable. Cladosporium, Aspergillus, and Penicillium — the three most common mold species we find in Suffolk County homes — all require the same licensed remediation protocol under NY Article 32. Every job starts with AIHA-accredited lab sampling to document species and concentration before any remediation begins.

Under New York Article 32 (the Mold Licensing Law in effect since January 2016), black mold removal in Suffolk County for any area over 10 square feet requires a NYLMB-licensed Mold Remediation Contractor and a separately-licensed Mold Assessor. The same company cannot legally perform both. Our remediation arm holds NYLMB MR00612 and our assessment arm holds NYLMB MA00534, operating independently as the law requires.

Black mold removal cost in Suffolk County, NY — 2026 breakdown

Suffolk County black mold removal costs range from $500 for small bathroom spots to $6,000+ for large-scale attic or basement remediation. The three main cost drivers are: (1) the size of the affected area in square feet, (2) the location — attic vs basement vs finished living space — which determines how much demolition and reconstruction is needed, and (3) whether post-remediation clearance air sampling is required for insurance or a real estate transaction. Every quote is fixed-price after the assessor’s site visit.

ScopeCost RangeNotes
Testing only (inspection + AIHA lab)$250 – $600Stand-alone assessment, no remediation
Small removal, under 10 sq ft (bathroom spot, wall cavity)$500 – $1,2001 day, no full containment required
Mid-size job, 10–50 sq ft (finished basement section, attic patch)$1,200 – $3,000Full containment, HEPA scrubbers, 1–2 days
Large basement or crawlspace remediation (50–200 sq ft)$2,500 – $4,500Multi-day, structural drying if needed
Full attic or whole-home Stachybotrys job (200+ sq ft)$4,000 – $6,000+2–4 days, may require drywall removal + HEPA vacuuming of framing
Post-remediation clearance air sampling (AIHA lab)+$300 – $500Required for insurance / real estate transactions

Inspection is free when it leads to remediation. See the full pricing guide for complete pricing details.

Nassau County vs Suffolk County — contractor licensing requirements compared

Homeowners often ask whether Suffolk County has different mold contractor licensing requirements than Nassau County. The short answer: both counties operate under the same NY Article 32 statewide framework, but enforcement and real-world expectations differ. Here is the full comparison.

RequirementNassau CountySuffolk County
Governing lawNY Article 32 (statewide)NY Article 32 (statewide)
Remediation contractor licenseNYLMB MR license required (10+ sq ft)NYLMB MR license required (10+ sq ft)
Assessor / inspection licenseNYLMB MA license requiredNYLMB MA license required
Dual-license prohibitionSame entity cannot assess + remediate same jobSame entity cannot assess + remediate same job
County-level permit required?No (mold work only)No (mold work only)
Building dept enforcement of Article 32Stronger — frequently checked in real estate closingsVaries by town; Brookhaven, Huntington stricter
What to look for when hiring a Suffolk County mold contractor: Request the contractor’s NYLMB license numbers before signing anything. A legitimate Suffolk County mold remediation contractor will have an MR prefix on their remediation license (e.g., MR00612). Verify the license is active at labor.ny.gov/moldinspection. If a contractor offers both inspection and remediation under one contract, that is an Article 32 violation and a red flag.

Our Suffolk County black mold removal process

01

Licensed assessment + AIHA lab sampling

Our NYLMB MA00534-licensed Mold Assessor performs a full site walk, moisture mapping with a calibrated meter, and AIHA-accredited lab sampling (air + surface). Results in 2–5 business days. Written assessment report documents species, concentration, and source.

02

Written remediation protocol (IICRC S520)

Based on the assessment report, our remediation arm prepares a fixed-price scope that follows IICRC S520 standards. No open-ended contracts. Suffolk County homeowners receive a line-item scope before work begins.

03

Containment + negative air pressure

For jobs over 10 sq ft, poly barriers isolate the work zone. HEPA-filtered negative-air machines run continuously, venting contaminated air outside. PPE for all crew throughout.

04

Physical mold removal + antimicrobial treatment

HEPA vacuum all affected surfaces. Remove and double-bag all contaminated porous materials (drywall, insulation, carpet). Treat remaining structural surfaces with EPA-registered antimicrobial at manufacturer-specified dwell time. HEPA-vacuum again after dwell.

05

Clearance sampling + documentation

Post-remediation air sampling by our separately-operating Assessment arm. Results compared to pre-remediation baseline and outdoor control. Clearance report suitable for insurance and real estate transactions. We explain every number in plain language.

Suffolk County towns with the highest black mold risk

Fourteen years of mold work across Suffolk County has shown us clear geographic risk patterns. South Shore towns carry the highest overall volume because of shallow water tables and storm legacy moisture. North Shore towns have elevated attic mold from the same 1960s construction failures. Inland towns have a mix of attic and basement mold driven by aging housing stock.

South Shore — Highest Risk

Bay Shore (11706), West Islip (11795), Babylon (11702), Lindenhurst (11757), Patchogue (11772), Sayville (11782)

Shallow water tables, Hurricane Sandy legacy moisture, aging septic systems. Basement and crawlspace mold most common.

North Shore — Elevated Attic Risk

Huntington (11743), Cold Spring Harbor (11724), Northport (11768), Centerport (11721)

1960s construction with improperly vented bathroom fans. Salt-air humidity from Long Island Sound. Attic Stachybotrys on north-facing sheathing.

Mid-Island — Consistent Volume

Smithtown (11787), Commack (11725), Hauppauge (11788), Islandia (11749)

Post-war housing stock with original exhaust venting into attic. Moderate basement risk from clay-heavy soil.

Brookhaven — Largest Town

Medford (11763), Selden (11784), Coram (11727), Shirley (11967), Mastic (11950)

High volume of 1970s–1980s ranch and cape construction. Crawlspace mold common in Mastic/Shirley coastal areas.

FAQ

Suffolk County black mold removal — common questions

Black mold removal in Suffolk County runs $500–$6,000+ depending on the affected square footage and the location. Testing alone (mold inspection + AIHA lab samples) runs $250–$600. Small remediation jobs under 10 sq ft — a bathroom ceiling spot, a small wall cavity — fall in the $500–$1,200 range. Mid-size jobs (10–50 sq ft in a finished basement or attic) run $1,200–$3,000. Large-scale remediation — a flooded basement, a heavily colonized crawlspace, or a whole-attic Stachybotrys job — runs $3,000–$6,000+. Every quote is fixed-price after our licensed assessor's site visit. No hourly billing.
Yes — and there are two separate licenses required under NY Article 32 (the New York Mold Licensing Law, effective January 2016). Any mold remediation project covering 10 or more square feet requires a contractor holding a Mold Remediation Contractor license from the NYLMB (New York State Department of Labor). Separately, the pre-remediation mold inspection (assessment) must be performed by a licensed Mold Assessor — and Article 32 explicitly prohibits the same company from performing both the assessment and remediation on the same job. Our remediation license is NYLMB MR00612. Our assessment arm holds NYLMB MA00534 and operates independently per the law.
The NY Article 32 licensing requirements are statewide — both Nassau County and Suffolk County fall under the same NYLMB Mold Assessor (MA) and Mold Remediation Contractor (MR) licensing framework. There is no county-level additional licensing in either county for mold work specifically. The key difference is enforcement: Nassau County building departments and home inspectors are more likely to request proof of Article 32 licensing before closing a real estate transaction, while Suffolk County towns (particularly Brookhaven, Islip, Babylon, and Huntington) vary more in how consistently they check. In both counties, any contractor doing mold work over 10 sq ft without NYLMB credentials is operating illegally — and you as the homeowner are exposed to liability if unlicensed remediation is documented on your property.
South Shore towns — Bay Shore (11706), West Islip (11795), Babylon (11702), Lindenhurst (11757), and Patchogue (11772) — carry the highest residential black mold risk in Suffolk County due to shallow water tables, Hurricane Sandy legacy moisture, and aging post-war housing stock with vapor barrier failures. North Shore waterfront towns — Huntington (11743), Cold Spring Harbor (11724), and Northport (11768) — have elevated mold risk from salt-air humidity and post-storm water intrusion. Inland towns like Smithtown (11787) and Commack (11725) have high attic mold rates from improperly vented 1960s construction. We respond same-day to all of these communities.
Visual identification is not reliable — Cladosporium, Aspergillus, and Penicillium can all appear dark or black on certain surfaces, and Stachybotrys can appear gray or green depending on the moisture level. The only way to confirm Stachybotrys is AIHA-accredited lab analysis of a surface sample or air sample. We take surface tape-lift samples and bulk samples during every assessment. In over 400 Stachybotrys jobs since Hurricane Sandy, the common identifying pattern is: black colonies on drywall or ceiling tile that has been continuously wet (not intermittently damp), a distinctive musty-earthy odor, and a slimy texture when wet. Stachybotrys requires the same IICRC S520 remediation protocol as any other mold species — the difference is that we are more aggressive about containment and clearance testing on confirmed Stachybotrys jobs.

Ready to breathe easier?

Same-week scheduling. Crew on-site in days, not weeks.

Free visual inspection, same-day estimate. Licensed assessor handles the test separately from remediation — NY Article 32 compliant from the first call.

Get My Free Inspection (631) 625-8807

Mon–Sun 7am–8pm · 24/7 emergency line

Call Now