What You Need to Know About Maryland's Mold Laws and Regulations

Key Takeaways

• New 2025 regulations demand that Maryland landlords must include a mold remediation plan in every lease, disclose known mold issues, and address tenant complaints within strict timelines.
• Landlords are legally required to act quickly on mold problems, hire qualified professionals when necessary, and keep detailed inspection and remediation records to avoid liability.
• Proactive prevention, clear communication with tenants, and strong documentation not only ensure compliance but also protect property value and reduce costly disputes.

Owning rental property in Maryland comes with many responsibilities, and recent changes in state law have added a new one to the list: managing mold.

Mold exposure can have devastating impacts on residents' health. That's why, beginning in 2025, regulations mandate that landlords across Maryland must follow stricter rules for mold growth prevention, remediation, and disclosure. These changes aim to protect tenants’ health while giving property owners clear guidelines for handling mold problems.

For rental property owners, understanding these laws is no longer optional; it’s a requirement. Failure to comply could lead to financial penalties, legal disputes, and even the loss of tenants.

Below is a breakdown by McKenna and Vane Property Management of what Maryland landlords need to know about mold laws and how to stay on top of compliance regulations.

Why Mold Became a Focus in Maryland

Toxic mold has long been a hidden issue in rental housing, but concerns have grown in recent years. Mold exposure can cause health problems such as allergies, asthma, respiratory issues, and skin irritation. Families with children, seniors, or individuals with weakened immune systems and existing health complications are particularly vulnerable.

In response to these risks, Maryland lawmakers passed legislation requiring mold plans in leases and stricter remediation procedures to prevent mold growth. By putting these rules into law, the state aims to reduce health hazards and provide renters with clearer protections.

The New Mold Law in Maryland

The most important update for landlords is that every residential lease in Maryland must now include a mold remediation plan.

This plan outlines what steps landlords will take if mold is discovered, including timelines for inspections, remediation, and tenant communication.

Under the law, landlords are required to:

1. Provide tenants with a written mold clean-up plan at the start of the lease.
2. Address reported mold problems within a specific timeframe.
3. Ensure remediation is performed by qualified professionals, like a professional mold remediation company, when necessary.
4. Maintain records of inspections and clean-up efforts.

Mold Disclosure Requirements

Maryland’s mold disclosure law makes it clear that landlords cannot rent out a property while keeping mold problems secret. If the rental unit has is visible mold, water intrusion, or documented history of remediation, tenants must be told in writing before moving in.

This protects both parties. Tenants have the right to make informed decisions about where they live, while landlords avoid potential legal disputes by being transparent upfront. Ignoring this requirement could result in lawsuits, lease termination, or fines.

Mold Testing and Inspections

Although Maryland does not currently mandate mold testing in every rental property, the new law encourages landlords to be proactive. If a tenant reports mold, the landlord must investigate promptly. Depending on the situation, visual inspections may suffice, but in some cases professional testing is recommended.

Professional testing can confirm whether mold levels exceed safe limits and can also identify hidden moisture sources. This documentation can be valuable for landlords, both to ensure remediation is effective and to protect themselves if disputes arise.

Landlord Responsibilities for Mold Remediation

If mold is discovered, landlords must act quickly. Maryland's mold regulations require timely remediation, and landlords cannot delay repairs that affect tenant health and safety.

In practice, this means:

• Maintaining the property and fixing the underlying cause, such as a leaky roof, burst pipe, or poor ventilation.
• Cleaning up existing mold safely, either with in-house staff or licensed contractors.
• Keeping written records of when the issue was reported, what steps were taken, and when the work was completed.

Failing to follow these steps can open landlords to liability. Tenants may be entitled to rent reductions, lease breaks, or legal remedies if mold is left untreated.

Tenant Responsibilities Under the Law

Maryland’s mold laws also recognize that tenants play a role in mold prevention. Renters are expected to maintain their units in good condition, that is, keep it reasonably clean, ventilate bathrooms and kitchens, and report leaks or mold growth promptly. Home mold test kits are a useful tool to check for mold infestation in your home.

If tenants fail to report issues or cause mold through neglect (such as leaving windows open during storms or not cleaning spills), landlords may not be held responsible. Clear communication between landlord and tenant is essential to prevent disputes.

Documentation and Record-Keeping

One of the key requirements under Maryland’s new legislation is thorough record-keeping.

Landlords must keep copies of:

• The mold remediation plan included in leases.
• Tenant reports of mold issues with written notice.
• Inspection results and remediation work orders.
• Any mold disclosures provided before lease signing.

These documents serve as legal protection. If a tenant claims the landlord failed to address mold, detailed records show compliance with the law.

The Financial Impact of Mold Laws

Mold remediation costs can add up, but non-compliance is far more costly. Lawsuits, penalties, tenant relocation expenses, and lost rental income quickly outweigh the cost of prompt repairs.

Proactive maintenance, such as inspecting for leaks, improving ventilation, and addressing small issues early, saves money in the long run. In fact, many landlords find that prevention is far less expensive than remediation once mold has spread.

How Maryland Property Owners Can Stay Ahead

With these laws now in effect, landlords should take a proactive approach:

1. Review and update all lease agreements to include a mold clean-up plan.
2. Inspect rental properties regularly for leaks, dampness, or visible mold.
3. Establish relationships with licensed remediation contractors.
4. Train property managers or staff on how to handle mold reports.
5. Keep detailed documentation for every property.

These steps not only keep landlords compliant but also build trust with tenants, reducing turnover and vacancy rates.

Why Professional Property Management Matters

For many property owners, staying compliant with Maryland’s mold laws can feel overwhelming. Managing mold prevention, remediation, and disclosure requires time, expertise, and careful record-keeping. This is where working with a professional property management company can make all the difference.

A reliable property management company understands the new mold requirements and has systems in place to help landlords comply. They handle everything from drafting compliant lease agreements with mold plans to coordinating inspections and hiring remediation professionals when needed.

For rental owners in Maryland, professional property management is more than a convenience; it is a safeguard against legal exposure and financial loss.

Final Thoughts

Maryland’s new mold laws mark a significant shift in landlord responsibilities. From providing mold remediation plans in leases to disclosing known issues and responding quickly to tenant complaints, landlords now face stricter obligations than ever before.

By staying proactive, keeping thorough records, and addressing problems quickly, rental property owners can protect their investments and keep tenants safe.

By partnering with an experienced local property management company like McKenna & Vane, landlords can navigate these new regulations with confidence, knowing their properties remain compliant and their rental business continues to thrive.