obligation to use a designated builder; building condition (real estate)
A contractual condition in Japanese real estate where the buyer of a plot of land must use a specific construction company to build the house. Common in land sales.
This land is being sold with a building condition attached.
When there is a building condition, you may not be able to choose your preferred construction company.
A longer phrase meaning 'land with a building condition'; 建築条件 is the condition itself.
Compound of 建築 (construction) and 条件 (condition). A modern real-estate term.