Types of houses

What you see and like probably does not require definitions. Still, for a foreign purchaser, it may be helpful to understand the meaning of the words which qualify different types of buildings, as this may cause some confusion:
 
Villa
They are properties intended for single-family housing, built in prestigious areas, characterised by large sizes, spacious parks or gardens, and higher-than-usual finishes. 
 
Villetta / Villino
Single buildings, semi-detached houses, or terraced houses that, despite having features of structural independence and exclusive-use external areas, do not meet the luxury and size requirements typical of villas. In common language, especially in some areas of Italy, it is not uncommon for a small house to be elevated to a ‘villa’. The cadastral distinction, in any case, is clear.
 
Baglio
They are fortified farms with large internal courtyards typical of Sicily.
 
Casale o casolare
They are often historic farmhouses.
 
Tenuta
The term refers to large landholdings often including a historic residence (the farmhouse).
 
Palazzo
The term is used for large, architecturally significant representative buildings. In everyday language, the term is used to refer to any building of a certain height, even if lacking in prestige. 
 
Terratetto
They are buildings that develop vertically over multiple floors, typical of historic centres. 
 
Attico
These are apartments located on the top floor of a building characterised by spacious terraces. Often, a ‘superattico’ is situated above them.
 
Mansarda
These are apartments located on the top floor of a building with one or more pitched roofs.
 
Seminterrati
They are dwellings situated at a partially underground level, characterised by a floor lower than the surrounding ground, with the ceiling partially or entirely above it.