A person's second home, usually located in a large city. The actor's primary residence was in California, but he had a pied-à-terre in New York City too.
a pied-à-terre
a small apartment or house in a city which belongs to someone whose main home is somewhere else and which they have so that they can visit the city whenever they want He has a pied-à-terre in Mayfair and a five-bedroom house in Dorset.