noun
construction costs; building costs
Refers to the expenses required to construct a building or infrastructure.
新しい橋の建設費は100億円を超えた。
The construction cost of the new bridge exceeded 10 billion yen.
建設費の高騰がプロジェクトの遅れの原因だ。
The soaring construction costs are the cause of the project delay.
建築費 is often used for building construction costs, especially for houses or buildings, and can be interchangeable with 建設費, but 建設費 is broader and includes civil engineering projects.
Compound of 建設 (construction) + 費 (cost, expense).