A landmark review of the system whereby private property is forcibly acquired to make way for major infrastructure projects was handed to the NSW government two years ago, but the report is being kept secret.

The review by David Russell, SC, was commissioned in May 2012 by then finance minister Greg Pearce.

Liz Slakey with her children Luca Slakey 8 (left), Pippi Slakey 2 (2nd from right) and Declan Slakey 5 (right) in the backyard of their Haberfield home they are set to lose.

"It is well known that compulsory acquisition of private land and its impacts have been an ongoing area of stakeholder concern for many years," Mr Pearce said at the time.

Mr Russell was due to report back by the end of 2012, but on Monday a spokesman for the NSW minister for finance, services and property, Dominic Perrottet, said it was not handed to the government until February 2014.