oops! here in Valencia we consider apartments as vacational flats, probably Valencia is not a good example of a part of Spain, we tend to change vocabulary, i.e. lunch = almuerzo (http://www.rae.es, most honorable Spanish dictionary) but we call almuerzo what English consider a morning tea break – instead we eat a big sandwhich stuffed with tortilla española, calamari and so on; so lunch for us is as simple as “comida”.
In Southamerica they call “piso” the floor where you step…
flat or apartment, I hope Wynnwill find a nice place!