The switch has been rumoured for some time and, talking to Le French Rugby Podcast, Sutherland said the Glasgow move was "done."
The loosehead missed out on Scotland's Six Nations squad after making the move to French Top 14 side Oyonnax on a one-year-deal.
Speaking about his move to the east of France, Sutherland said: "It hasn't worked out for me, or Tammy [Sutherland's wife] and the kids. We did all want to come up together and experience it together, but we've struggled to find a house.
"We're not going to upset the boys and take them out of school and change their schooling for the sake of four months. Now that the Glasgow thing is done as well, I'm pretty happy just to battle on for the next three or four months."
Sutherland has only started three games since the move to Oyonnax - all of which have come in the Challenge Cup, and the Borders-native said head coach Gregor Townsend explained the decision to drop him.
"He just said 'you haven't played enough and when you have played, we haven't seen you at your best', which is fair enough. I understand. There's no point throwing the toys out of the pram.
"It's frustrating and yes, I was pissed off for a couple of days, but get over it. I just have to get my head down and try and get as many minutes as I can in the tank, and hope that the coaches think that that's enough to get back in.
"It's very hard when you take that phone call and they say you're being left out this time. 'We believe in you, we think you can come back and blah, blah, blah.' You think, 'well, if you believe in me...'
"I'm not very good at watching," Sutherland admitted. "The bit I hate the most is the anthem, because I really enjoy that part of playing for Scotland - singing the anthem with the lads.
"It's a very emotional part of the game, so I find it difficult watching the boys singing that when I'm not there. I often leave the room. I go off with my beer in the huff in the kitchen while the boys sing the anthem."