You can't it was disabled through all of the Harvest Moon MM games because you can marry Jamie ,but the game ends and doesn't allow you to go into the house.
First you go to Woody's, and talk to him and do New Construction.And if you have a lot of gold you could by a level:1,2 or 3 household.
You get the remodel for cheaper than buying a new thing...
Just use the reins to get walk the animals to the barn and right as your about to walkin let go and if yours close enough then the animal will just go back inside.