Greater Portland and the southern coast carry most of the commercial and route-based residential work, from Portland and South Portland through Scarborough, Saco, Biddeford and Kennebunk. Old housing stock, dense in-town neighborhoods, a substantial restaurant and hospitality sector, and the highest concentration of property management and institutional accounts in the state. It is also where local pesticide ordinances are most likely to shape what you can apply and where.
The midcoast and Down East, from Brunswick and Rockland through Bar Harbor and Ellsworth, run on seasonal property. Summer homes, camps, inns and rentals that sit empty through the winter and open all at once in June, which compresses the year and produces the classic empty-building problems of rodents, wildlife and moisture. Drive times are long and a single service call can be most of an afternoon.
Inland and north, Lewiston, Auburn, Augusta, Waterville and Bangor anchor the year round markets with institutional, medical and university accounts on older building stock. Beyond them the state turns to forest and farm, with the blueberry barrens Down East and the timber counties north of Bangor bringing forestry and agricultural application into a very different kind of book from a Portland route.