West Australian subcontractors have been saddled with further debts totalling hundreds of thousands of dollars after major civil landscaping company BCL Group went into liquidation.

The Wangara-based company's collapse comes as the latest blow to the construction sector, after Cooper and Oxley and Choice Living both went into administration in the past month.

BCL Group worked on major dollar projects including the West Coast Eagles' new Lathlain headquarters, the Supreme Court Gardens upgrade and the $440 million Elizabeth Quay development, as well as other government and private projects.

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The development came after it was announced last week BCL Group was suspending trading and conducting a review into its financial viability.

WA Subcontractors chairperson Louise Stewart said subcontractors would bear the brunt of the company's financial woes.

"I would expect that it would be 30 [subcontractors] or more," she said.

"We're talking hundreds of thousands of dollars that those subcontractors are now looking likely not to be paid."

Perth's Elizabeth Quay development was among the projects BCL Group worked on. ( 720 ABC Perth: Emma Wynne )

Ms Stewart said she feared more companies could go under in the coming months, despite signs of life in the WA economy.

"There is no doubt that there are going to be more builders that are going to be in trouble," she said.

"We've just coming out of a period where it's been very difficult in the construction industry."

WA's construction industry suffered a big drop in dwelling investment last financial year. ( AAP: Lukas Coch )

Major construction firm Cooper and Oxley entered administration earlier this month, closing the doors on building sites worth hundreds of millions of dollars.

Choice Living went into administration in January.

Hundreds of unsecured creditors were left out of pocket last year after yet another WA builder, Builtoncorp, collapsed with debts totalling $20 million.

The state's construction industry recorded an almost 20 per cent drop in dwelling investment last financial year.