Why not? You already bank there. It will give you a base line for mortgage rates and terms. However, please do not end there. Most of the time you can find a better loan offer and better loan servicing through a local mortgage lender in town. You would be doing yourself a disservice to only shop at one location for a home loan.
Ask your real estate agent for a top local lender that they trust and have worked with. These providers can either qualify you online, or you can set up an appointment with them at their office to get a quote. Often they will have the best rates available and they will have more loans to choose from, but it is almost certain that you will get the best home loan service, and have a great purchasing experience.
Online mortgage lenders might have some of the best-looking deals out there and they look great at first but turn out to not be so great when you read the fine print. Also, they are the highest risk (in my opinion) of messing up your home purchase process, by not closing on time or failing to even fund the loan. Home buyer beware.
I would love to sit down with you and discuss your real estate plans. If you're thinking of buying soon or down the road, I would love to know what you're looking for and share with you how I can help you find the right home.