You need to contact your Congressman or Senator to arrange the tour. As I noted in my review, it’s an uncommon tour and some Congressional offices may be unfamiliar with it...but they should be able to figure it out. You’ll need to be a US citizen, and pass a FBI background check. Tours are Sat mornings only.

You cannot Tour on a walk up or by yourself; actually, there are only two tours a week, both on Saturday morning. You must go through your congressman or senator in advance, and go through an FBI background check in order to tour this building… And even then, Pre-and post tour security is tight. Full metal detector and shoes off search before hand… And they ran the bomb dogs through the building after our tour. Seriously. Remember, the entrance is less than 100 yards from the east entrance of the White House. All that said – this was one of our very favorite tours in all of DC... and it’s and uncommon one. The rep at our congressman‘s office said he hadn’t set one up for anyone in a few years, as most people don’t know to ask. Many go to BEP (engraving and printing), and somehow think they saw the treasury building.

Hi, There is a booth in front of the Treasury Building that you pick up your tickets. There is no charge for tickets. You just need to pick the time you want to tour. If you want to tour early, you have to be in line early. Once you get your tickets, you have to walk around (or drive) to the other side of the building to enter for your tour. If is well worth a visit, (in my humble opinion) Enjoy!

sorry just saw this. I would say 90 min tops.