"Es una buena vivienda."

[scottann]

What is the difference between casa and vivienda, does it mean 'place to live' : ie an apartment too?

[drewby89]

I'd like to know the answer to this too. Is casa and vivienda inter-changeable when referring to a house?

[hello_world_hola]

Why is una necessary?

[rspreng]

You are talking about a specific house.