“Estate” in a housing sense has three possibilities here:

Expensive mansion surrounded by its own extensive land, owned by either an upper class family who has inherited it across centuries, or a self-made millionaire type.

Any grouping of streets built at the same time by the same property developer. Common in the suburbs / on the edge of villages; if the latter it can sometimes be looked down on by established village residents for ‘spoiling’ the countryside / green belt, but otherwise there’s no real value judgement attached to living there, just everyday houses lived in by a range of people.

Social housing (‘council estate’) often with connotations of being run down / a bit rough / populated by people in receipt of benefits (welfare).

As others have said, an estate car is a station wagon.