The congregation started meeting in the back room of the Carpenters Arms in the 1840s, and by 1870 had built the chapel on its current site.
However, from 1970 the chapel experienced growing congregations and its members now take active roles in the wide range of local organisations and charities.
Over recent years, the chapel has become a focal point for a significant amount of fund raising for charities - providing support for local and global projects.
The members' covenant of Tabernacl Efail Isaf is: We are a community of people who have come together voluntarily to seek to grow in our shared understanding and our ability to exercise the teachings and spirit of Jesus.
A popular route is to cross the bridge between Station Road and Heol-y-Parc, through Celyn Paddocks before visiting the Efail Isaf Village Green on the way to the Woodland Walk area to rejoin the By-Pass footpath.