Very, very few people in the US live in the same home long enough to pay for it. People get married, have kids, send them to college, divorce, die, change cities for job, etc. If you are convinced this is THE HOUSE, then plan accordingly. Otherwise, making changes is going to cost you on fees if you sell in a few years. Also keep in mind you can probably safely get more than your current mortgage rate in the stock market as a return so plowing your cash into a mortgage where it won't appreciate seems dumb.