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Application of Housing Lease Protection Act to Subleases in Private Rental Apartments

송시옥송시옥 기자· 7/5/2026, 9:22:55 AM· Updated 7/5/2026, 10:28:35 AM

When an existing tenant in a private rental apartment enters into a sublease agreement to rent out the property to a third party, it is essential to clearly understand the applicability and legal protection scope of the Housing Lease Protection Act (hereinafter referred to as the Lease Protection Act). Private rental housing has distinct legal and institutional characteristics compared to ordinary apartments, requiring meticulous attention from both parties involved in a sublease agreement to avoid legal disadvantages.

Why the Complexity in Private Rental Apartment Subleases?

Unique Legal and Institutional Nature of Private Rental Apartments

Private rental apartments refer to housing built or acquired and supplied for rent by private developers. These properties are subject to legal restrictions under relevant laws such as the 'Special Act on Private Rental Housing,' requiring them to be rented out mandatorily for a specific period (typically 4, 8, or 10 years). During this mandatory period, there are limitations on rent increase rates, and the sale or resale of the property may be strictly prohibited.

Furthermore, as private rental apartments often receive support from the Housing Urban Fund or possess some public character, regulations aimed at ensuring tenants' housing stability are applied in conjunction with the Special Act on Private Rental Housing and the Housing Lease Protection Act. This can lead to different outcomes in tenant rights, such as the exercise of the right to renew a lease, compared to ordinary condominiums for sale.

Primary Causes of Subleases and Their Implications

Sublease agreements, where a tenant rents out their dwelling to another person, arise due to various economic and personal circumstances. For example, a tenant facing sudden financial difficulties might find it hard to afford rent, or they might consider subletting if they need to be away for a period due to relocation, studying abroad, or overseas stays. In some cases, subleasing might be attempted for investment purposes, aiming to profit from market price fluctuations or additional rental income after signing the initial lease.

However, before entering into any sublease agreement, the first crucial step is to check if the original lease agreement explicitly contains a 'no subletting' clause. If a sublease is prohibited by the contract and is undertaken nonetheless, the original landlord can terminate the lease agreement, potentially drawing both the original tenant (sublessor) and the subtenant into legal disputes.

Scope of the Housing Lease Protection Act Regarding Subleases?

General Principles of the Housing Lease Protection Act for Subleases

The Housing Lease Protection Act aims to ensure stable housing for citizens by stipulating special provisions within the Civil Code concerning leases of residential buildings. This law generally applies to all citizens who lease a housing unit for residential purposes. In the case of subleases, the subtenant is, in principle, entering into a new lease agreement with the original tenant (sublessor). Therefore, the provisions of the Lease Protection Act for tenants do not directly apply to the subtenant. Essentially, the sublease agreement itself is primarily treated as a private contract between the sublessor and the subtenant.

However, considering that the Lease Protection Act applies to leases of 'buildings used for residential purposes,' subleases also occur in residential buildings. This provides a basis for subtenants to receive certain legal protections. The extent of this protection varies depending on whether the original landlord's consent is obtained.

Legal Status of a Subtenant in a Sublease with Landlord's Consent

Article 3, Paragraph 3 of the Housing Lease Protection Act stipulates that in the case of a lawful sublease with the landlord's consent, the subtenant can assert their rights against third parties who acquire rights later, provided the subtenant has taken possession of the property and completed their resident registration (address registration). The 'right of opposition' (or opposability) means the subtenant's ability to assert their rights against third parties (e.g., a new property owner, a secured creditor) based on their occupation of the property and resident registration. This forms the legal basis for the subtenant's continued residence in the property.

Furthermore, if a subtenant with the right of opposition obtains a fixed-date stamp on their lease agreement, they may also be partially recognized with a preferential right of satisfaction. This right allows the subtenant to be repaid their deposit before other creditors. However, in such cases, the subtenant's deposit amount cannot exceed the total deposit the original landlord is obligated to return to the original tenant. Supreme Court precedents and legal theories suggest that the protection for the deposit may be limited to the amount directly paid by the subtenant, potentially ranking lower than the original tenant's deposit claim.

Key Precautions Before Subleasing Private Rental Apartments

Matters the Sublessor (Original Tenant) Must Verify

As the original tenant intending to sublease a property to a third party, the sublessor must strictly adhere to the terms of the original lease agreement. The first and most important step is to check if the original lease agreement contains a no-subletting clause. If subletting is prohibited, the sublessor must negotiate with the landlord and obtain written consent for the sublease. Proceeding with a sublease without the landlord's explicit written consent can be a clear ground for terminating the original lease agreement, which can directly harm both the sublessor and the subtenant. Therefore, the sublessor must carefully retain the sublease consent document from the landlord and be fully aware of the legal risks associated with violating a no-subletting clause in the original lease.

Specific Procedures for Subtenants to Obtain Protection

A subtenant, as a third party seeking to enter into a sublease agreement for a private rental apartment, must follow these procedures to secure their deposit and housing stability. First, they must obtain clear written consent from the original landlord (property owner) for the sublease agreement. This consent document should specify the details of the sublease, including the deposit amount, rent, and contract period. Second, upon taking possession of the property, the subtenant must immediately complete their resident registration (address registration). Third, they must obtain a fixed-date stamp on their lease agreement for the deposit or rental deposit. By fulfilling these three requirements (property possession, resident registration, and fixed-date stamp), the subtenant can secure the right of opposition and preferential right of satisfaction under the Housing Lease Protection Act, establishing a legal basis to preferentially recover their deposit from the sublessor or the original landlord in case of unforeseen events. If a sublease agreement is made without the landlord's consent, the subtenant will have difficulty demanding the return of their deposit directly from the original landlord and can only assert their rights within the contractual relationship with the sublessor.

Importance of Reviewing the Real Estate Registry Certificate and Lease Agreement Before Contracting

Before entering into a sublease agreement, the subtenant must obtain and carefully review the Real Estate Registry Certificate (formerly known as the Real Estate Register) to understand the current property rights. This document reveals whether any other security interests or usufructuary rights, such as mortgages, provisional attachments, or leasehold rights, are registered against the property. These registered rights can directly impact the subtenant's ability to recover their deposit. Therefore, it is wise to thoroughly assess these rights before finalizing the payment of the balance, and if necessary, seek assistance from a legal professional. Additionally, a clear and detailed sublease agreement must be drafted, involving the original landlord, the tenant (sublessor), and the subtenant. The agreement should specify the deposit amount, monthly rent, management fees, contract period, and any special conditions. Each party's signature or seal must be obtained. This serves as a crucial safety measure to prevent future disputes.

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