The boss of an embattled Perth building company has assured hundreds of customers their unfinished homes would be completed with the help of "divine intervention".

About 200 Nicheliving customers, some of whom signed contracts dating back to 2019, are still waiting for their homes to be finished.

Company director Ronnie Michel-Elhaj has previously refused requests from the media to explain the cause of delays.

He has now said a "higher power" would help get customers into their homes, but would not provide a timeline on when the works would be completed.

"We've been very fortunate. I think I call it divine intervention, right? So I'm a Christian person, and I like to see that there is God assisting the company and our team," he told Nine News masthead WA Today.

Nicheliving customer Kathy Ellis said the comments were of little consolation to her and others with unfinished homes.

Ms Ellis has been living in a campervan with her two children for 20 months.

She said she no longer trusts the company.

"I've been fed so many lies over the past four years, even if they wrote to me now, I wouldn't believe what they tell me," Ms Ellis said.

'It's an insult'

WA Premier Roger Cook said he's glad Mr Michel-Elhaj felt supported in a divine way but described the comments as insulting.

"We just want him to commit, not to his religion, but to his customers," he said.

"It's an insult to suggest that somehow divine influence has got Nicheliving to the point they have."

COVID stimulus blamed

Nicheliving's took on double their usual number of annual home sales after the launch of the federal and state government's home stimulus grants during the COVID-19 pandemic.

Mr Michel-Elhaj placed much of the blame for his company's woes on the stimuli, which contributed to workforce and resource shortages across the construction industry.

Mr Cook accepted government had a role to play, but said it was up to builders to manage their commitments.

"All builders are in this situation, we are working with the building industry to support them," he said.

"Some builders didn't overcommit, didn't overreach in terms of the contracts they were prepared to enter into and they're doing really well."

Criticism 'sexist'

Nicheliving has also drawn criticism for appearing to prioritise work on projects like Mr Michel-Elhaj's wife's luxury Applecross mansion while other families teetered on homelessness.

Mr Cook said he understood why people were angry about the progress on that project.

"Any clear-thinking person would realise that it's just not on, that the head of Nicheliving would look after himself and look after this family, before looking after his customers," he said.

Mr Michel-Elhaj said the criticism was "sexist".

Nicheliving had been managing the project but Mr Michel-Elhaj said he has moved the job to another builder.

He refused to confirm or deny whether his family would eventually move into the home.

Mr Michel-Elhaj's comments come after it was revealed both Nicheliving directors were listed as directors of a new company, Urban Infill Developments, which was registered in mid-September.

WA Housing Minister John Carey said he's appalled at the way Nicheliving have conducted their business.

"They should be focused on completing those existing homes rather than trying to set up a new business."

Western Australia's Building Services Board deregistered Nicheliving in July.

But a stay order issued by the State Administrative Tribunal (SAT) allowed Nicheliving to continue operating until a full review takes place next month.