Owners claim their units have been gutted and their locks changed during works to stabilise the cracked Opal Tower in Sydney.

Some residents are still in temporary accommodation nearly two weeks after cracks were found in the Sydney Olympic Park building on Christmas Eve.

The Opal Tower at Sydney Olympic Park. Credit:Paul Braven

After a preliminary independent investigation confirmed a number of design and construction issues, residents returned on Saturday to find their homes "absolutely trashed".

Pictures seen by the authors of this article reveal one unit has had its ceiling and flooring torn away to allow equipment to prop up the concrete slabs separating each floor.