Bahasa Jepangnya “luas bangunan”

luas lantai dasar; luas bangunan

floor space (esp. of the ground floor only); floorage

rasio luas bangunan terhadap lahan; rasio tutupan bangunan

building-to-land ratio; building coverage ratio; land coverage; site coverage

mengurangi luas bangunan saat renovasi

reducing the floor space when remodeling a building