[ Columns][HOAM Legal Column for Foreigners] What to Do When a Landlord Ignores Leaks or Mold

11 Sep 2026




Many foreign tenants report leaks, mold, or heating failures to their landlord only to have repairs endlessly delayed. The bottom line: a landlord has a duty to keep the leased property in a condition fit for use, and if that duty is neglected, a tenant can have repairs done themselves and bill the landlord, claim a rent reduction, or even terminate the lease. Defects that intensify seasonally — winter heating failures or summer leaks and mold — are particularly important to address early, since prolonged neglect can compound both health risks and property damage.



What is the scope of a landlord's repair obligation?


A landlord is responsible for major repairs necessary for the tenant's normal use of the property — leaks, heating or plumbing failures, structural defects, and the like. Minor repairs a tenant can ordinarily handle themselves, such as replacing a lightbulb or fixing a torn screen, are typically the tenant's responsibility. If the lease contains a specific special provision on this point, however, that provision generally takes precedence, so the contract language should be checked first. While some contracts shift part of the repair duty to the tenant through a special provision, a clause pushing even major structural defects onto the tenant is likely to be found invalid.



How should you respond to a landlord who keeps delaying repairs?


If a repair request goes unanswered for a substantial period, a tenant can hire a contractor themselves and bill the landlord for the cost. It's essential to keep a record of having notified the landlord of the need for repair and the estimated cost beforehand, as this reduces disputes over reimbursement later. If a defect made part of the property unusable, a rent reduction proportional to that period can be claimed as well, with the reduction percentage typically negotiated — or determined through litigation — based on the severity of the defect and the extent to which use was restricted.



Can you terminate the lease if the defect is serious enough?


If recurring mold or leaks make the property genuinely unlivable and the landlord continues to refuse repairs, a tenant can terminate the lease and claim the deposit back along with damages such as moving costs. To have the termination recognized as valid, it's important to thoroughly document the repair requests and the extent of the defect through photos, video, and expert opinions. Where feasible, obtaining professional testing results — such as mold spore testing or indoor air quality measurements — can significantly strengthen the case for a valid termination.

Keeping a record of repair requests and notices is what ultimately supports a later cost claim or a claim to terminate the lease. Jinheon Law Firm supports foreign tenants in responding to breaches of the repair obligation, claiming repair costs, seeking rent reductions, and terminating leases.



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