If you do not plan on staying in the house very long, refinancing may not be in your best interests.
Closing costs can be expensive. If you plan on refinancing your home to save money, be sure to take into consideration how much the closing costs on the new loan will cost you.
If you want to make sure the interest rate your lender offers you is the rate you get when you close the loan, ask about a mortgage lock-in (also called a rate lock or rate commitment). Any lock-in promise should be in writing. Make sure your lender explains any costs or obligations before you sign.
If you are paying private insurance on your current mortgage, refinancing may allow you to do away with this unnecessary expense.