Cold settles into the Housatonic valley at Sheffield and stays put, with Mount Everett standing white over the west side of town all winter. Berkshire Property Maintenance LLC works straight through it — plowing driveways and lots, shoveling walks, spreading salt and sand on the grades that ice up first. When the valley greens again, the same attention goes to lawns: mowing, trimming, edging, and cleanups in spring and once more after the leaves come down. Long driveways out here take real time in a storm, and getting one open by breakfast is the whole point of the night. Sheffield and the southern Berkshire towns around it make up the service area.