What are the houses called in Spain?

Casa is the most common word for a house in Spain. It can refer to a single-family home, a town house, or an apartment.

Castillo is a castle.

Palacio is a palace.

Mansión is a mansion.

Residencia is a residence.

Vivienda is a housing unit.

Apartamento is an apartment.

Piso is an apartment.

Estudio is a studio apartment.

Buhardilla is an attic apartment.

Dúplex is a duplex.

Tríplex is a triplex.

Casa adosada is a town house.

Casa de campo is a country house.