What fees are associated with this loan? Is this a HELOC or a home equity loan, by any chance? (If so, that really is the same as a second mortgage on your home.) How much lower is the interest rate on the consolidation loan than the rates on your credit cards? You can use the calculators at
www.bankrate.com to figure out whether this makes financial sense for you. Clean's suggestion about asking for lower rates is excellent. It can help if you have another credit card offer in front of you that you ask your current creditor to match.
One very important factor to consider: why did you get into credit card debt in the first place? Are you generally a very disciplined person financially, and is this a unique situation that has to do with medical or unusual personal circumstances? I ask because it would be really, really bad to jeopardize the equity in your house if there's even a chance that you might run up the balances on those cards, or any cards, again. Have you already made moves to reduce your spending and to pay-as-you-go for expenses? Are your cards out of your wallet and in a huge block of ice in your freezer?
I ask these questions as a fellow-debtor, and wish you the best in resolving the situation!