These days it benefits agents to have knowledge of all surrounding towns. My Brokerage has offices in over 13 towns and we all feel comfortable servicing clients in all of them. It really comes down to research and I pride myself on doing extensive studies into the town my clients are thinking about. I personally grew up in Newton now live in Waltham and hang my license in Arlington so limiting my knowledge to one area is almost impossible. You want to find an agent that you feel has knowledge of what you need, if you want someone with a broad market share we are out here.