Moved in Aug 09, engaged March 10. So we lived together for 7 months (almost 8 ) and I wouldn't have done it any other way. We were MUCH more informed as far as each other's quirks, how to work together better, and how compatible we are when there was no going home to another place in times of stress.
We were planning on moving in together about 2 months before we got engaged, so that would be almost a year before the wedding. But work did not allow for that. So we live 3 hours apart, and will in this situation for another year at least. Everyone keeps asking if we will move in together half way between the 2 cities . As much as I want to be with my FI, I don't want to be driving that much everyday. I have too many other things to do.
We have basically been living together since the first week we started dating, but the "official" move-in was about 8 months after we started dating. We got engaged after 3 1/2 years and will be married on our 4 1/2 year mark. He's the best roommate I've ever had. It was important to both of us that we could really live together comfortably.
DH and I moved in together in October '08, were engaged in March '09, and married in July '10, so we actually lived together for 5 months before becoming engaged.
We started looking for a house about a month or two after we got engaged. It has already been a year and we just closed on the house. He's out of the country at the moment so techincally we won't be living together, until a few weeks from now. That's over a year after being engaged.
Engaged August 2009. Start living together September 2010. Getting married March 2012. Already been together since July 2005.
We lived together for 2 years before getting engaged. The overwhelming norm with people I know is that they live together before getting engaged, but I do know of one couple who waited until they got married to move in together.
I think everyone has different priorities, and they're not right or wrong. I would never agree to marry someone that I haven't lived with, but that's just what works for me.
bought a house and moved in together November 2008....engaged April 2010.....wedding July 2011...so pretty much lived together for a year and a half prior to engagement
We "functionally" moved in together after about 3 months and then did it "properly" ~10 months later - so we lived together for just under 2 years in total (10 months "officially") before getting engaged.
Fi and I have been together for nearly 8 years, moved in together over 7 years ago, bought a house together 2 years ago, and got engaged about a month ago.
We got engaged a little over 2 years after we bought a condo and moved in together. Before that though, when we had separate apartments, my husband didn't have roommates but I did. I used to spend probably up to half of every week (at least) at his place.
We'd been dating almost 3 years when we got engaged, and are getting married in March 2011 (we're pretty sure). We're waiting till we are married to live together, but he's been sort of living here on the weekends for about a year.