Car Parking, this was one place where we drove round and round! There is a large underground car park beneath the Forecourt of the building with a time limit of three hours, but this was completely full.
Outside, and the are plenty of parking bays, but these were all full too, unless you wanted to walk a long way, which my husband couldn't do because of his bad legs. We ended up finding a park after a lot more laps. It looked like something may have been on, as a lot of people were coming to their cars.
If you have somebody elderley or a little incapacitated, I would drop them off 1st, then go and get a park. I do not know if it is always this busy, but just be aware!
access to the public carpark is via Federation Mall from Old Parliament House
Having 'bucketed' the radar traps, I should caution that Canberra's driving standards sometimes leave a little to be desired. Maybe because of the speed restrictions, the pressure on hurried drivers shows in other ways which the government makes little effort to control. Especially in the newer suburbs and in busier periods you can expect to be 'tailgated' and cut off in roundabouts (of which there are many). So drive carefully.
In most of Australia, revenue-hungry governments have distorted the genuine need for 'road safety' into a motherhood justification for hidden radar cameras. The ACT is no better than other places in this regard and hides radar-equipped vans, usually on wide safe roads, in places where they cannot be seen until too late. The back of the van is usually toward oncoming traffic, so the radar can operate from inside the van without being obvious. They also operate at night, so if you are startled by a bright flash in your eyes, have your wallet handy when the bill arrives some weeks later. This is one of the vans, doing a PR exercise at a car show. Note the 'helpful' sign on top.