Welcome to 18 Dettling Rd, a pristine and private 4 BR 2.5 BA Colonial set on a quiet cul-de-sac on the Sudbury line, abutting the Assabet National Wildlife Refuge. A perfect blend of traditional charm and modern improvements. An updated kitchen with quartz and stainless, opens to a fire place family room, ½ bath and laundry. The slider off the kitchen leads out to the deck, overlooking your private backyard oasis, with a large level lot and miles of woods beyond. A formal LR and DR finish off the first level. Upstairs find the spacious master bedroom with a walk-in closet and en suite bath. There are 3 additional BRs with ample closets and another full BA. The finished lower level boasts a flexible space which could be used as a 5th BR, or an office. There's more! Central Air, gleaming hardwood floors, newer windows and an attached 2 car garage. Take a shortcut to the shops at Maynard Crossing. Commute from S.Acton Train, Rts 117, 2 and 495. Truly one-of-a-kind!