Rarely available! Stunning riverfront, architect-designed Modernist Retreat located on "storied" Old Concord Road. Perched atop a bluff overlooking Fairhaven Bay with unparalleled views of the Sudbury River & conserved land, this 4.84 acre compound includes a main residence, detached garage/workshop, and guest house. Travel along a private tree-canopied private lane to the main house c.1994 built to pull the outdoors in with its emphasis on fine construction, walls of glass, & timeless architectural detail. In this serene setting, enjoy sunsets from the living room, summer sun by the in-ground pool, first floor primary bedroom with sumptuous bath, cool breezes on the screen porch, glorious gardens with specimen plantings & hardscape, and so much more. The guest house (c. 1963) designed by John Quincy Adams is sited on the river's edge. The garage/workshop with separate office is ideally located near the main house. An unique opportunity to live close to Boston surrounded by nature.