former site; site of a demolished building
Refers to the land or location where something used to be, especially after a building has been removed or an organization has moved.
An apartment building was built on the former factory site.
学校の跡地は公園として整備された。
The site of the former school was turned into a park.
An apartment building was built on the former site of the factory.
They made a park using the site of the closed-down school.
There is a plan to construct a commercial facility on the site of the former station.
敷地 is the plot of land a building currently stands on (or is meant for), whereas 跡地 is the land left behind after something was torn down or moved away.
跡 is a broad word for any trace, mark, or remains, while 跡地 narrows this to a specific plot of land where a building or facility used to be.
Used when referring to a site or location as a counted place; there isn’t a more specific conventional counter for this noun.
Compound of 跡 (あと, 'trace, remains') and 地 (ち, 'land, ground').