how old do you have to be an architect

I would start with looking at different schools and there programs.
Illinois Institute of technology is a great one in Chicago. Sci-arc in Los Angeles is also great to look into. Most state colleges offer a 4year program.

Also you will need to get license but that will take a few years because you'll have to put some time in the industry . Age wise, you probably will not become an official licensed architect until you're like 28-30. That's if you're on top of your game.

There isn't an age restriction. You need to have the required education to be an architect. Check the link below for more information.

http://study.com/how_to_become_an_architect.html