noun
age of a building; years since construction
Used primarily in real estate, architecture, and property listings to indicate how many years have passed since a building was constructed.
この物件は築年が浅いので、内装がきれいです。
This property is relatively new, so the interior is in good condition.
築年が古い家は耐震性が心配だ。
I'm worried about the earthquake resistance of an old house.
Refers to an old building; 築年 is the objective age, while 築古 implies significant age.
Compound of 築 (construction) and 年 (year). The exact historical derivation is uncertain, but the term is a straightforward Sino-Japanese compound used in modern real estate contexts.