subdivision
noun
(also sub-division) uk/ˌsʌbdɪˈvɪʒən/ us [ C or U ]
one of the parts into which something is divided, or the act of creating these:
He has been responsible for the subdivision of work.
The index shows the subdivisions of the prospectus.
[ C ] PROPERTY, GOVERNMENT US
a group of houses built together in a planned way, often by the government in order to provide houses for people to rent or buy at a low cost:
Residents are uniting against a developer's plan to build a subdivision in the heart of their town.