0 used to refer to a rented apartment, office, etc. that contains furniture and equipment, and has extra services provided such as cleaning and a reception (= the place in a hotel or office building where people go when they first arrive): --
The company offers privately owned and serviced apartments throughout Manhattan.
1 used to describe a property for rent that is supplied with all the necessary furniture and equipment: --
serviced apartments
The institute operates out of a suite of serviced offices in Covent Garden.