The Galway City Council received 16 complaints last year about unauthorised letting of properties in the city.
However, no action was taken on any of the properties' owners after investigations were completed.
A spokesperson for Galway City Council said the local authority must carry out investigations into complaints reported under planning law.
"We are obliged to investigate any complaint submitted about unauthorised letting [in the city] under planning law. For 2018, we received 16 complaints, investigations were carried out with no enforcement taken in any instance."
The news comes after regulations surrounding short term lets came into effect across Ireland on Monday. Home-sharing on platforms such as AirBnB, will only be allowed where a house is a person’s primary residence inside designated rent pressure zones.
It was also revealed that only two applications were submitted to the local authority to convert residential properties into short term letting units.
One application was deemed successful.
