The collective noun is a block of flats.
block
block
Block of flats = apartment building or apartment complex.
205km
The collective nouns are:an undulation of hillsa block of flats
Un immeuble
yes
'un appartement' (masc.) an apartment block, a block of flats: un immeuble
Block of flats in the towns, villas, etc.
Nelson Mandela House
They are! I lived in the 4th floor of a block of flats for nearly 15 years.