Massachusetts Mold Lawyer: Tenant, Homeowner, and Condominium Mold Claims

Mold usually signals a moisture problem: a roof or window leak, failed plumbing, poor ventilation, or a construction defect. In Massachusetts, mold can support claims for rent abatement, repair orders, property damage, relocation costs, and in some cases personal injury. Muggeo & Associates represents tenants, landlords, homeowners, and condominium owners in mold disputes from our Salem office.

How Massachusetts Law Treats Mold

Massachusetts has no single stand-alone mold statute for rental housing. Instead, mold claims are built from several overlapping sources of law:

State Sanitary Code (105 CMR 410). The Code, substantially revised effective April 1, 2023, sets minimum standards for dwellings, including weathertight structure, working plumbing, and control of moisture and conditions that endanger health. Local Boards of Health enforce it through inspections and orders.
Warranty of habitability. Serious mold can breach the implied warranty of habitability, supporting rent abatement. See our page on breach of the warranty of habitability.
G.L. c. 239, § 8A. In a residential nonpayment or no-fault eviction, a tenant may raise qualifying conditions as a defense and counterclaim.
G.L. c. 93A. Unfair or deceptive conduct by a landlord in the business of renting may support multiple damages and attorney fees.
Negligence and contract. Owners, contractors, condominium associations, and sellers can be liable when their conduct caused the water intrusion or concealed it.

Common Mold Situations We Handle

Apartment mold from roof leaks, failed windows, or plumbing that the landlord did not repair after notice
Basement and bathroom mold caused by inadequate ventilation
Condominium mold traced to common-area leaks, raising association responsibility (see condominium matters)
New-construction or renovation mold caused by defective flashing, roofing, or envelope work (see construction defect claims)
Mold concealed or not disclosed in a home sale
Landlord-side defense of mold counterclaims in eviction cases
Commercial tenants whose business space became unusable

What to Do if You Find Mold

Give the owner or manager written, dated notice and keep a copy.
Photograph and video the mold, water staining, and any leak source, with dates.
Request a Board of Health inspection. An inspection report is strong evidence that conditions existed and that the owner was on notice.
Keep medical records if anyone in the home has symptoms, and tell your doctor about the exposure.
Do not withhold rent or move out without first understanding the legal requirements.
Use our tenant conditions and mold documentation checklist.

Proving a Mold Injury Claim

Mold injury cases require proof of causation. That typically means environmental testing or a qualified inspection, medical records documenting a diagnosis, and expert testimony linking the exposure to the condition. Property-damage and rent-abatement claims usually require less: proof of the condition, notice, and its effect on the use and value of the premises.

For Landlords and Property Managers

Owners who respond promptly, find the moisture source, remediate properly, and document each step are in a far stronger position. We help landlords build response protocols, communicate with tenants, coordinate with insurers and remediation contractors, and defend claims and counterclaims.

We represent tenants, landlords, and property owners across the North Shore, including Salem, Peabody, Beverly, Lynn, Marblehead, Swampscott, Danvers, Gloucester, Newburyport, Lynnfield, and communities throughout the North Shore.

Frequently Asked Questions

Is there a specific mold law in Massachusetts?

Massachusetts does not have a single stand-alone mold statute for rentals. Mold and the moisture that causes it are addressed mainly through the State Sanitary Code (105 CMR 410), which requires owners to keep dwellings free of conditions that endanger health, and through the implied warranty of habitability, consumer protection law, and ordinary negligence and contract principles.

Who is responsible for mold in a rental apartment?

Generally, the owner must maintain the structure, plumbing, roof, windows, and ventilation so that moisture and mold do not develop. A tenant can be responsible when the tenant caused the condition, for example by blocking ventilation. Who caused the moisture is often the central factual question.

Should I stop paying rent because of mold?

Withholding rent carries risk. Under G.L. c. 239, § 8A, a residential tenant may raise conditions as a defense in a nonpayment eviction only if specific requirements are met, including that the owner knew of the conditions before the tenant fell behind. Talk with a lawyer before withholding.

Can I recover medical expenses for mold exposure?

Possibly. A personal injury claim requires proof that the exposure caused a diagnosed condition, usually through medical and environmental experts. Property damage, relocation costs, and rent abatement may also be available depending on the facts.

How long do I have to bring a mold claim?

Deadlines vary by claim. Many tort and habitability claims carry a three-year limitations period, consumer protection claims generally four years, and some construction-related claims are limited by a statute of repose. Act promptly to protect your rights.

Do you represent landlords in mold disputes?

Yes. We advise owners and managers on response protocols, remediation documentation, tenant communications, insurance notice, and defense of claims and counterclaims.

Talk With a Massachusetts Landlord-Tenant Attorney

If you have a mold question, call Muggeo & Associates at (978) 741-1177 or request a consultation online. We answer calls 24/7 and can also be reached at jared@ljmassoc.com. Our office is at 133 Washington Street, Salem, Massachusetts.

This page provides general information, not legal advice. Laws change and every situation is different. Contacting the firm does not create an attorney-client relationship. Prior results do not guarantee future outcomes. Last reviewed November 2026.

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