Shop around. Comparison shop to get the best rate.
Ask about the margin. If you're offered a rate that's lower than the competition, it's probably just an introductory rate, so ask about the lender's margin. For example, if the introductory rate is 3.5 percent and your lender's margin is 2 percent, your final interest rate will be 5.5 percent.
Consider a conversion clause. Some HELOCs allow you to convert a variable interest rate to a fixed rate, usually during the draw period (5-10 years).
Watch out for balloon payments. Balloon payments mean that you must pay the balance in full when the draw period is up. Do not choose this option unless you have the financial means to handle it.
Create a family plan. Decide what the money will be used for and who will handle the funds. Keep in mind, you can lose your home if the HELOC is not handled properly. Create a payback plan. Come up with a reasonable plan for how the loan will be paid back