Canton sits in granite country, where the Blue Hills lean down over the rooftops and the Neponset slips away from Ponkapoag through low woods — ledge just under the topsoil, stone that has always asked to be built with rather than hauled off. Millennium Landscape & Design works in that grain: patios, walkways and walls set into the slope; masonry stairs, stone veneer, fireplaces and chimneys rising square; decks and porches thrown open to the back of a house; whole landscapes designed, dug, and grown in. There is a plain, lasting pleasure in a wall that will still read plumb when the maples go copper above the old viaduct, and in new construction, additions, roofing and siding that settle into a street as if they had always been there. Then winter comes down off the hills and fills a commercial lot overnight, and the plows go out — pavement dark and open again before the first headlights turn in. It is Canton work, and the towns around it: Milton, Sharon, Stoughton, Dedham, Westwood, Needham, Newton.