built-up area
area which is full of houses, shops, offices and other buildings, with very little open space
en-US/ˈbɪlt - ˈʌp ˈɛɹiə/
en-GB/ˈbɪlt - ˈʌp ˈɛəɹɪə/
area which is full of houses, shops, offices and other buildings, with very little open space