1The number of years since a building was constructed; used in real estate to indicate a property's age and condition.
このマンションの築年数は15年ですが、内装はきれいにリフォームされています。
This condominium was built 15 years ago, but the interior has been nicely renovated.
築年数が古いと断熱性や配管の問題が起きやすいことがある。
Older buildings may have issues with insulation or plumbing.
新築か築年数の浅い物件を探している人が多い。
Many people look for newly built or relatively new properties.