Is the HOA Responsible for Mold?

It depends on what caused the moisture. Mold follows the same rule as water damage: whoever’s water source caused it usually owes for the cleanup. A common-element leak points toward the association; moisture from inside your unit usually points back to you.

Mold Follows the Water Source

Mold is never really the first problem. It is what grows after water sits somewhere too long.

That means every mold question is really two questions. First, who must fix the source that let water in? Second, who pays for the mold damage and remediation that resulted?

If a shared pipe, the roof, or the building envelope leaked, the association usually owns both answers. If the water came from your washing machine, your bathroom, or a leak you never reported, the mold is usually yours. The water damage rules are the starting point for almost every mold dispute.

What Master Policies and HO-6 Say About Mold

Even when the water loss itself is covered, mold remediation often is not — or not fully. Many master policies cap mold coverage at a set dollar amount, treat it as a separate endorsement, or exclude it unless it stems from a sudden, covered event.

The same is true on the unit side. An HO-6 policy may cover interior mold damage, but often with its own cap or exclusion.

Before assuming remediation is paid, ask for the mold endorsement in writing. Get the actual dollar limit, not a verbal assurance. A “few thousand dollars” cap shows up in some policies, and it can fall well short of real remediation costs.

When the HOA Becomes Responsible Anyway

An association can become responsible for mold even when the original leak was minor. The trigger is usually delay.

If a board knows about a common-source leak and does not fix it, and mold spreads while owners wait, that delay can shift liability. Courts and arbitrators often treat unreasonable delay on a known common-element problem as negligence.

Mold can also become a habitability issue. If growth affects air quality or makes a unit unsafe to live in, a board that ignores repeated notice may owe for both the fix and resulting damage.

Mold Scenarios and Who Pays

Mold from a Slow Leak in a Common-Element Pipe

A shared supply line inside a wall leaks for weeks before anyone notices. The pipe is a common element, so the association is usually responsible for the repair and the resulting mold remediation, subject to its policy limits. Check who handles pipes in a condo to confirm which lines count as common versus in-unit.

Mold from My Own Shower or Bathroom

Steam and standing water from daily bathroom use are normal owner risks. If poor ventilation or a neglected in-unit leak causes mold, it is typically the owner’s responsibility to remediate. Regular exhaust fan use and prompt repairs usually prevent this scenario entirely.

Mold Behind a Shared Wall Between Units

Mold behind a wall separating two units can come from either side. If it traces back to a common pipe or the building structure, the association usually handles it. If it traces to one owner’s plumbing or a neglected leak, that owner is usually responsible for both units’ damage.

Mold from HVAC Condensation

Central or shared HVAC systems can generate condensation that seeps into surrounding drywall. If the equipment is a common element, the association is usually responsible for the mechanical fix and the mold it caused. If the unit has its own dedicated system that the owner never serviced, responsibility often stays with the owner.

Mold After a Roof Leak

A roof leak that goes unaddressed for months is a common scenario for serious mold growth. Since the roof is almost always a common element, the association is typically responsible for the repair and for remediating mold in affected units, within its policy’s mold limits.

The Board Delays and Mold Spreads

An owner reports a common-source leak, but the board takes months to respond, and mold spreads through the unit. Even if the original leak might have been a smaller claim, the board’s delay can make the association responsible for the full extent of the damage.

What to Do If You Find Mold

1. Stop the moisture source immediately, or ask the association to stop it if it is a common element.
2. Photograph the mold, the water source, and any visible damage before cleanup begins.
3. Send the board written notice describing the leak, its likely source, and the date you found it.
4. Request the mold endorsement from the master policy and the HO-6 policy, in writing, including any dollar cap.
5. If the board delays on a known common-source leak, follow up in writing and keep a dated record of every notice.

Mold problems rarely stay simple once insurance and delay enter the picture. Review the HOA responsibility pillar guide or the full who-is-responsible hub for the underlying rules, and talk to an HOA lawyer if the board won’t act on a known common-source leak.