When considering a pre-owned condominium, many people wonder whether a home inspection is really necessary. In short, a home inspection (hōmu insupekushon, formally an "existing housing condition survey") is a system in which a professional such as an architect examines a home for deterioration and defects, and it can be used to ease the anxieties specific to buying a pre-owned home. It isn't mandatory, but for older properties or detached houses it's worth considering as one piece of your decision-making material.
- A home inspection (existing housing condition survey) is a system in which a professional examines a home's deterioration and defects, mainly through visual checks and measurements.
- Under the 2018 revision to the Real Estate Brokerage Act (Takken Gyōhō), agents must state at the time of the brokerage agreement whether they can arrange an inspection.
- If an inspection has already been carried out, a summary of the results is disclosed in the important matters explanation (jūyō jikō setsumei).
- The cost is roughly ¥50,000–70,000 for a condominium, taking a few hours (somewhat more for a detached house).
- The realistic timing to request one is after your purchase application and before the sales contract, which requires coordination with the seller and agent.
The bottom line: what a home inspection is
A home inspection (existing housing condition survey) is a system in which a professional such as an architect examines a home for signs of deterioration and any defects. Unlike new construction, a pre-owned home may carry hidden concerns — such as water leaks or structural deterioration — that aren't visible to the eye, and having a professional check the property gives you more material for your purchase decision. It's a purely voluntary system, and whether to use it is entirely up to the buyer. The real value of a home inspection is that it lets you confirm, from an objective standpoint, things that are hard to grasp from a viewing alone.
Background: the 2018 revision to the Real Estate Brokerage Act
Under the 2018 revision to the Building Lots and Buildings Transaction Business Act (Takken Gyōhō), real estate agents became obligated, when concluding a brokerage agreement, to explain whether they can arrange a home inspection. In addition, for properties where an inspection has already been carried out, a summary of the results must be conveyed to the buyer in the important matters explanation (jūyō jikō setsumei). This formalization has positioned the inspection as a common option in pre-owned home transactions, and it has made buyers more aware of it as something they can choose to use.
What gets checked
A home inspection mainly focuses on deterioration in the parts of the building that bear structural load, and in the parts that prevent water intrusion. Since the survey is centered on visual checks and measurements without damaging the building, no major preparation is needed to carry it out. Hard-to-see areas such as under the floor and in the attic are also checked wherever possible. The results are compiled into a report, which can also serve as a reference when planning repairs after purchase.
Typical cost and time
For a condominium, the cost is roughly ¥50,000–70,000, with the survey itself taking a few hours as a guideline. For a detached house, there are more areas to check — such as under the floor and in the attic — so the cost tends to run somewhat higher than for a condominium. Prices vary by inspection company and scope of survey, so it's reassuring to check the breakdown of the estimate before requesting one. Choosing optional add-on items can increase the cost further.
When to request one
The realistic timing to request a home inspection is between submitting your purchase application and signing the sales contract. At this stage, you can coordinate the schedule with the seller and agent and more easily reflect the results in the contract terms. Since the seller's consent and coordination for attendance are needed, it's best to raise the idea through your agent early. Scheduling can take time, so it helps to build in a comfortable margin.
When it makes sense to use one
If there are causes for concern — an older property, a detached house, or a purchase premised on renovation — using a home inspection is effective. If you're considering enrolling in existing-home defect insurance (kizon jūtaku baibai kashi hoken), an inspection may also be a condition for enrollment. It isn't mandatory for every transaction, but it's worth knowing about as an option that gives you more material to judge by. It's a good idea to consult your agent at the consideration stage and use their input to help judge whether you need one.
FAQ
How much does a home inspection cost?
Roughly ¥50,000–70,000 is the guideline for a condominium. A detached house or a more detailed survey may cost somewhat more.
Is an inspection mandatory?
It isn't mandatory. Agents are obligated to explain whether they can arrange one, but whether to actually have one done is up to the parties involved (as of 2026).
Will the seller mind?
Coordination is needed, but as the system has become formalized, it's increasingly becoming a routine step. Raising it through your agent after your application and before the contract tends to go smoothly.
Summary
A home inspection is a voluntary system in which a professional examines a home for deterioration and defects, and it can be used to ease the anxieties of buying a pre-owned home. Keeping the cost and timing in mind, consider using one based on the property's age and type.