when did your baby start sleeping in their own room?

Elizabeth is my first child and she is 9 weeks old. When we first came home from the hospital my room wasn't finished so she slept in her swing and my husband and I slept on couches.
Now our room is done and she sleeps in the bassinet right beside my side of the bed. If we had it my way she would be in a co sleeper but we couldn't afford one.
So my question is when did u have you baby start sleeping in their own room?

    My babies all coslept until about 2 years old... I know too long... but it was just how it happened.
    About Shannon
    Born: Warren, Michigan
    Current: Central Lake, Michigan
    Birth: February 12
    On Moms.com since: Mar 31, 2014