A royal commission into more than two decades of “dodgy” planning decisions by Coalition and Labor state governments will be a central plank of an integrity package promised by the Victorian Greens.

The 18-month inquiry would take in contentious projects dating back to Docklands in the Kennett years, and include Opposition leader Matthew Guy’s handling of rezonings at Ventnor on Phillip Island and Fisherman’s Bend in inner Melbourne.

It would look at major expansions of Melbourne’s urban growth boundary, including under the Brumby Labor government in 2009. The Andrews government's support for a proposed Apple store at Federation Square would also come under scrutiny.

Docklands in Melbourne Credit:Simon Schluter

The Greens say questionable decisions to rezone large swathes of farm and other land have handed windfalls to landbankers, speculators and developers — in some cases hundreds of millions of dollars in profit.