The bill for the NSW government's plan to knock down and rebuild three Sydney sports stadiums is more than half what was spent constructing every venue needed to host the 2000 Olympics and supporting infrastructure.

A report handed to then NSW treasurer Michael Egan in March 2002 calculating the financial cost to the state of hosting the Olympics puts the total bill for "construction and capital works" at $3.02 billion.

This included building Stadium Australia, the Superdome, the aquatic, athletic and regatta centres, Dunc Gray velodrome, the hockey, softball, equestrian and shooting centres and the villages for athletes, media and technical staff.

Also factored into the cost were construction of associated roads, bridges and parking facilities, Homebush bay rail line, Olympic Station and pedestrian areas.