SUN --:-- · ALT --°
2026-05-28 · Compliance

What happens without a completion certificate

NOTE

When construction finishes, the building is inspected and, if it complies, issued a completion certificate. A great many existing buildings in Japan obtained their original confirmation but never went through the final inspection, so no such certificate exists.

Its absence does not in itself make the building illegal. It does, however, create real friction in several places: it becomes hard to demonstrate that the current state is lawful when applying to extend or alter; applications for a change of use stall; and some lenders mark the property down in their assessment.

The remedy is to commission a specialist survey of legal conformity, which uses the drawings and an on-site inspection to establish whether the building as it stands complies with the code of its time. That survey takes both time and money, so it belongs in the plan before you buy.

Is the "completion certificate: yes" line on a property sheet worth your attention? Very much so. When it is blank, your options afterwards narrow considerably.

Have a specific property to assess?

Send us the property details; we reply first with feasibility and the main risks.