Earlier this year Chevron won approval from the Pilbara Joint Development Assessment Panel to expand its construction camp to 6864 beds, adding 2000 extra places, however it will need to construct fewer rooms if it installs bunk beds.

A spokesperson for Chevron told Energy News that no decision has been made to introduce dual occupancy - but it is an option for the future if required.

"In order to maintain operational flexibility we are exploring options to support potential increased accommodation demand, however, no decisions have been made at this time," the spokesperson said.

Chevron said it continually reviews and responds to the needs of the Wheatstone project, which will reach peak construction next year, and it aims to provide high quality accommodation and recreation facilities to meet the needs of workers.

It is considering building an additional gym, tavern, dining room, carpark and toilet blocks.

It says bunking arrangements would be optional, however the Australian Manufacturing Workers' Union says workers will be robbed of their privacy and put at risk of mental health issues.

The Onslow camp is already controversial for its decision to house FIFO operational workers 28km from town in the existing Ashburton North construction village for safety reasons.

The Wheatstone LNG project is more than 65% complete and on track to deliver first gas in late 2016.

The spat with the AMWU comes as three unions involved in the construction of the Gorgon project on Barrow Island begin voting today over possible industrial action in support of a change to a 20 day on, 10 day off roster.

Accommodation is a major issue at resource projects, especially on Barrow Island, where working space is restricted from environmental reasons.

In 2010 workers at Woodside Petroleum's Pluto LNG project staged an eight-day strike over accommodation arrangements at their remote camp

Woodside wanted to introduce a "motelling" scheme, where workers could be moved to a different donga each rotation, rather than the previous system of permanent camp accommodation

The Construction, Forestry, Mining and Energy said motelling at the Gap Ridge accommodation village in Karratha robbed workers of their dignity.

In April the 2000 bed camp's lease, which was due to expire in May 2017, was not renewed, with the company expected to house workers in Karratha.