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I don't think Ryan Homes does it. They would not start my build until I was fully approved through the Underwriting and middle score was 700.
They will want to see your previous 2 bank statements now. For you, that should be September and October 2017 statements. When you are around 30-45 days from closing, they will want updated statements as well.
So the answer is both times.
You're only 4 points from qualifying? That's great! That can be done by simply lowering your credit card balances depending on what your utilization on those look like.
Do you have collections/charge-offs too? Does the lender want you to take care of those?
We did the same thing in the beginning. Put the house in my husband's name and then after we added all the bells and whistles we were out of range on the DTI so we had to me to the loan, which is where things went down because of my bad credit at the time. Another thing to consider, if you're able to work on your credit, you can always choose to be added to the loan when they start to package it around 60 days before closing. A mortgage is a huge thing to have on your credit, so if you can, do it.
Sounds like you're in a better position than I was in. I had collections/charge-offs, ONE credit card and didn't know a thing about utilization.
Depending on what your utilization percentage is now, by the time you close you can gain well over 20-30 points by closing.