Every once in a while a home becomes available that sparks joy in every category that matters the location, exterior, interior. 21 Endicott Street is that home. Built-in 2005 by one of Newton's most renowned builders and owned by one family, this home has proven its quality and craftsmanship over time, it feels better today than the day the sellers moved in. Gorgeous level lot abuts the Newton Highlands Aqueduct and light streams in from every direction. Upon entering the foyer, you are drawn into the formal, fireplaced living room which opens to the separate dining room perfect for entertaining large parties on special occasions. The sun-drenched, custom chef's kitchen includes a large dining area and separate office nook and boasts top of the line appliances including double ovens, Wolf gas stove, and Sub Zero refrigerator. The granite center island provides an opportunity for people to gather when meals are prepared. Next to the kitchen is the warm and inviting family room with built-ins, fireplace, and surround sound. Off the family is the three-season porch from where you can gaze at the wildlife in the serene and private back yard, complete with mature plantings, patio, and fire pit. Finishing this floor is the powder room and mudroom with direct access to the heated, oversized, two-car garage. From the kitchen, ascend the rear staircase to the second floor which has 4 bedrooms and 3 full baths, one Jack and Jill, and laundry room. The expansive master suite includes vaulted ceilings, double walk-in closets and sumptuous bath with dual vanities, soaking tub, and separate glass shower. The architect's crowning jewel on this floor is the den (22'x22') with floor-to-ceiling bookshelves, skylights, and cathedral ceiling. Unwind at the end of the day with a movie or a great book. Winding up the custom-built staircase, you arrive at the top floor. Here you have two generous bedrooms, one en-suite, an additional full bath, a large walk-in storage closet, and a library area with floor-to-ceiling bookcases. The finished, walk-out, lower level includes a kitchenette, full bath, bedroom, and playroom. 6 full and 1 half bath. This level is optimal for an in-law au pair suite.