Key points for preparing and investigating the important matters explanation document for condominium buildings.

Updated: July 2026, 8

"According to the 'Act on the Ownership of Separate Buildings, etc.', if a building has several structurally separated parts that can be used as residences, shops, offices, warehouses, or other building-related uses, each of these parts can be the subject of ownership (separate ownership)."

In this context, "condominium buildings" refers to typical condominiums (both new and used). Based on this premise, we will explain the key points for preparing and investigating important information disclosures in condominium sales.

Survey points for private and common areas

Separated buildings such as condominiums consist of private areas and common areas.
In civil law and other legal terminology, there are two very similar terms: "possession" and "co-ownership." However, they are completely different terms, so caution is necessary. We will explain each term below.

- Items to check regarding the exclusive-use area

A private unit refers to the portion of a building that is subject to independent ownership, in other words, the living space in an apartment building.
In order for a portion of a property to be recognized as an exclusive-use area, it must be structurally and functionally independent.

• Items to check in common areas

Common areas refer to areas other than private units, such as entrances, corridors, stairwells, and elevators, which are used jointly by all unit owners.

While the regulations grant specific owners exclusive use rights to verandas, balconies, and private gardens, these are registered as common areas.

Reasons why the inspection of important matters for condominium buildings is considered special.

Condominium buildings differ from regular buildings in many ways, and careful attention is required when preparing important information documents and conducting preliminary investigations.
In terms of registration, land and buildings are usually separate real estate properties, so they are registered separately.
However, in the case of condominiums and other subdivided buildings, the building and the land are registered as a single unit (integration of land rights).
Therefore, the registration method for registers is different from that for ordinary buildings, so please be careful.

Furthermore, especially in the buying and selling of used condominiums, restrictions such as management regulations (restrictions on pet ownership, restrictions on renovations, etc.) may apply in addition to legal requirements. Therefore, it is necessary to accurately describe the details of these regulations, the status of management fees and repair reserve funds, and any special provisions that apply to specific conditions in the important matters explanation document.
In addition to the usual explanation of important matters, it is also necessary to thoroughly examine the management regulations and other related documents, which makes the process more time-consuming and difficult.

The advantages of outsourcing the preparation and investigation of important matters for condominium buildings.

In the buying and selling of condominium buildings, regardless of whether they are new or used, there is a wide range of investigation processes involved, including confirmation with the management company and management association, on-site inspections, and review of regulations and minutes of various general meetings. In particular, with used properties, expert judgment is required, such as obtaining a summary of arrears and incorporating special clauses that address the specific risks of the property.

Outsourcing these time-consuming investigations and the creation of important disclosure documents to professionals offers the following advantages:

- Prevention of overlooked information and errors in documentation: We thoroughly check complex points such as rights, management regulations, and repair plans to reduce the risk of problems after the transaction.
• Significant reduction in workload: By shortening the time spent on research and inquiries, resources can be concentrated on core tasks such as sales and customer service.
- Creation of special clauses that reflect actual circumstances: We ensure safe real estate transactions by reflecting appropriate special clauses that are relevant to the property and transaction situation.

For any concerns regarding the investigation of condominium buildings or the preparation of important disclosure statements, please leave it to our company, which possesses specialized expertise.