More than 120 people graced Woodvale Reception Centre for the event on August 7, including founding priest the Rev Mark McCracken.
Event MC Bruce Herriman said St Anselm�s began as an offshoot of St John�s Anglican Church, Greenwood in 1993, with a small group of parishioners meeting at Kingsley�s Creaney Primary School.
Two years later the rectory and worship centre opened nearby on Forest Hill Drive and was consecrated by the then Archbishop of Perth, Peter Carnley.
It wasn�t until 2013 that the parish was able to employ its first full-time priest, the Rev Gillian Rookyard.
Mr Herriman said the regular worshipping community at St Anselm�s had grown steadily in the past two years and there was a great sense of optimism and encouragement about the years ahead.
As part of the 20-year celebrations, next month Archbishop Roger Herft and the new Warden of Wollaston College, Gregory Seach, will discuss the life and spirituality of the parish�s patron saint, Anselm. The seminar on September 9 is open to all and begins at 7pm.