She previously served as a member of Clare County Council from 2019 to 2020.[7]
Garvey was an unsuccessful Green Party candidate in the 2020 general election for the Clare constituency. A fluent Irish speaker, she represented the Greens on the Irish-language TV debate on TG4 prior to that election.[8]
In 2022, she opposed plans for an eight wind-turbine farm in County Clare. She said, "There are a lot of people locally who don't want it there because they already have enough of wind-turbines in the area... I have never been out demanding wind farms in my life and I don't intend to start now".[10]