built-up
adjective/ˌbɪlt ˈʌp/
/ˌbɪlt ˈʌp/
[usually before noun] (especially British English)- (of an area of land) covered in buildings, roads, etc.
- to reduce the speed limit in built-up areas
Oxford Collocations DictionaryBuilt-up is used with these nouns:- area
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built-up