"Piringa Court backs onto Greenslade Court"
So I think that https://www.openstreetmap.org/way/895749377 can be split with Piringa Court as the eastern blocks, Greenslade Court being the western block of flats.

Also, personally I'd map these Haumaru housing areas as simple landuse=residential, rather than social facilities. AFAIK there's no facilities beyond the housing flats.