No ... only he can use the exclusion on his half ... you have not lived there for 2 out of the last 5 years. Your new home is certainly homesteaded as your personal residence. Talk to a local RE attorney and/or a tax professional to see if you may be able to quit claim the home to him BEFORE the sale and then you will only need to file a gift tax return on the gift of equity where you would owe no taxes.
