What if I have a sub-4% mortgage -- should I keep the house?

Keeping a home with an interest rate well below current market rates is worth serious consideration, since giving it up to buy elsewhere usually means trading that rate for a much higher one on a new loan. Renting out the current home instead of selling, if that is financially and practically workable, is one way to keep the low rate working while still moving. The right call depends on how the numbers compare between staying, renting it out or selling and buying again at today's rate. Brian Beatty can model those specific scenarios against a homeowner's actual numbers before they decide.