Shincheonji Church occupies a building at 114 Cambridge Street in West Leederville, in Perth's north-west.
The Korean-based group, who claim to be true believers of Christianity, are facing allegations of brainwashing vulnerable children.
The explosive claims were aired by residents at a heated Town of Cambridge council briefing on Wednesday.
Locals want the group to be kicked out and the office to be shut down, Perth Now reported.
Jim Spencer, who lives in the south-western Perth suburb of Roleystone, said his daughter is among dozens who are spending an excessive amount of time at the location, which presents as an education facility.
'Us parents are working hard to get our kids out...our kids have been stolen from us,' he told the meeting.
'My daughter spends 16 hours a day at this place, six days a week, voluntarily.'
Mr Spencer claimed the group targets young people and international students and lures them in through 'non-denominational Bible studies'.
A former teacher at the church provided a written submission to the council and said Shincheonji practices are illegitimate.
'The church bears no recognised qualifications to be an educational organisation,' the submission read.
'There is no certifications that justify their teachings as publicly recognised. The teachers are uncertified, as was I when I was inside.'
The group who leased the office space in Cambridge Street are listed under the name International Education Organisation.
The organisation is a registered charity that provides 'structured Bible study classes' to those who want to find out about Christianity.
Daily Mail Australia has contacted the International Education Organisation for comment.
Reegan Cake, who is a consultant hired by the organisation, told the meeting that staff at the church all have registered educational qualifications.
'The students there worked to obtain internationally recognised qualifications that can be used to educate others,' Mr Cake said.
The Shincheonji Church is also understood to have operated on university campuses in Sydney, Melbourne and Perth for several years.
The council, which has been looking into a group for more than a year, forced them to make a development application to change the use of the building to an 'educational establishment'.
The council then approved the application, despite 14 submissions against the proposal.
The council will decide at a meeting next Tuesday whether the building is fit to be operated as an educational facility.
Several recommendations were also made as part of the proposal: the opening hours being limited to 7am to 9pm six days a week, 40 students and two staff members permitted to be on site at one time, and less window tinting.
Daily Mail has contacted the council for further comment.
The Shincheonji Church was founded in South Korea by Lee Man-hee in the 1980s.
The group, which is understood to have around 215,000 members around the world, claims to be the only church of Jesus Christ.
The church also promotes a view of biblical texts, such as the the Book of Revelation, that goes beyond its literal meaning.
Mr Man-hee claims he was sent by the Holy Spirit to create 'God's kingdom of heaven on earth'.
Mainstream Christian denominations regard the organisation as a cult.
Monash University student Caleb described to news.com.au last year how he was recruited into the church after he was approached by two students on campus and asked to fill out a survey.
He described a journey which became more 'intense' and time-consuming after he attended some Bible classes. Soon he was being asked to recruit other students and said he soon had 'no privacy' from church leaders.
Other people reported being approached at train stations where they are quizzed about their religious beliefs and their nationality.
'I am Christian, so I did end up going to a few of their ‘bible studies’ (but I) dropped it because I could see so many red flags with what they were preaching,' one woman who was approached at Melbourne's Southern Cross Station posted.
'They blamed exhaustion on the devil and pretty much tried to separate you from family … they’re extremely manipulative and often target young females under the guise of friendship.'