How to Read a Building Ledger —
A 5-Minute Self-Check Before You Sign

The Registry Tells You 'Ownership'; the Ledger Tells You 'the Building'

Before a real estate contract, everyone checks the property registry, but surprisingly few pull the building ledger. If the registry is the record of ownership and liens, the building ledger is the building's own résumé — whether it was built legally, what its registered use is, and whether it has a violation history are all there, and anyone can get it free through Korea's Gov24 portal.

Reading Each Checkpoint in Practice

① Unauthorized building marking — a yellow tag at the top means enforcement penalties are being or will be imposed. Buy the property, and the correction obligation transfers too. ② Use — for an academy, clinic, or restaurant startup, this field decides your business's fate. A mismatched use requires a use change, which the building's conditions might not even permit. ④ Floor status — a rooftop structure or extension present on-site but absent from the ledger is likely an undetected violation.

⑤ Use-approval date matters more than it seems. A building's age marks the code era it was built under, and older buildings carry a wider gap against current standards (seismic, fire, insulation). During a major repair or use change, that gap is a signal of cost that may need to be closed.

When the Ledger and the Site Don't Match

In practice, trouble always starts with "the ledger says one thing, the site says another." Our Eonnam-dong use-change project also had to address an unregistered rooftop structure as a precondition, and if such gaps are discovered after a contract is signed, the burden lands squarely on the new owner or tenant. Compare the ledger against the site before signing, and if there's a discrepancy, specify in the contract who resolves it, by when, and how. A free five-minute document can prevent a multi-million-won dispute.

Frequently Asked Questions

Q. Where do I get a building ledger?

Anyone can get it free via Gov24 with just the address. Multi-unit buildings issue a unit ledger; single/multi-family buildings issue a general building ledger.

Q. How do I check whether it's an unauthorized building?

A yellow 'Unauthorized Building' marking at the top and violation details in the change-history section. It means enforcement penalties and correction obligations follow.

Q. What if the ledger and the actual building don't match?

Undetected additions not on the ledger are likely unauthorized structures. Compare before contracting and specify handling terms for any discrepancy.