How to evaluate a used home
Structure, age, defects, inspection, renovations, and legal compliance.
Assess the earthquake standard, structural condition, maintenance history, defects, hazard exposure, legal compliance, and resale liquidity — old does not automatically mean bad, and a fresh renovation can hide deferred structural work.
Key points
- Check the earthquake standard, structure, and maintenance history.
- Commission an independent inspection; a fresh finish can hide deferred work.
- Confirm legal compliance — rebuildability, road frontage, and setbacks.
- Assess hazard exposure and realistic resale liquidity.
What to assess in a used home
A used home is not automatically riskier than a new one, but it needs evaluation across several dimensions: the earthquake standard (commonly associated with permits from June 1, 1981, though building-specific structure, retrofit, foundation, soil, and maintenance still matter), the structural condition and maintenance history, defects, hazard exposure, legal compliance, and resale liquidity. A lower price than a new home is the reward for taking on a known building whose history you can inspect — the risk is in what you fail to check.
Inspection and legal compliance
Commission an independent qualified inspector where practical, and do not waive an inspection because a building looks renovated — a fresh finish can hide deferred structural work. Confirm legal compliance separately: whether the property is rebuildable, has adequate road frontage, meets setbacks, and complies with current zoning. A non-rebuildable (再建築不可) property is much cheaper but carries severe finance, insurance, renovation, and resale limitations. Verify these facts in the important-matters explanation and with the relevant office rather than trusting the listing.
Key points to carry away: Check the earthquake standard, structure, and maintenance history; Commission an independent inspection; a fresh finish can hide deferred work; Confirm legal compliance — rebuildability, road frontage, and setbacks; Assess hazard exposure and realistic resale liquidity. Use the linked guides and calculators for the full decision, and confirm anything material with the lender, a licensed broker, a judicial scrivener, or a tax accountant before you act.
Who this is for
- Used-home buyers
- Anyone assessing a renovated property
What this is not
- A structural engineer’s report
- A fresh renovation can hide deferred structural work; inspect and confirm rebuildability before buying.
Frequently asked questions
Should I avoid all pre-1981 buildings?
Not automatically; inspect retrofit, structure, soil, maintenance, and documentation.
Does inspection guarantee no hidden defects?
No. It reports on what is visible and measurable at the time.