This impeccable Colonial-style residence is ideally located on a nearly quarter-acre lot in the sought-after Sumner neighborhood of Bethesda. The residence has been beautifully expanded with a rear addition and has undergone an extensive renovation. The current owners have just completed additional updates and finishes under the direction of Kelly Proxmire and Gilday Renovations. It features approximately 5,700 square feet of living space. The house is illuminated by an abundance of natural light from large windows throughout. There are exceptionally-scaled formal rooms, making the house ideal for entertaining, as well as comfortable family spaces for everyday living. The main level has a formal living room and sophisticated library with built-ins and a powder room, both complemented by lovely wood-burning fireplaces. There is also an elegant dining room and a sun-filled office with a separate entrance on this floor. The addition towards the rear of the home provides a remarkable gourmet kitchen, which the current owners have fully updated. It features a beamed ceiling, floor to ceiling windows overlooking the rear yard and garden, a gas fireplace, high-end appliances, and an impressive L-shaped center island with a breakfast bar. The kitchen opens to the breakfast room and there is also a nearby butlers pantry with additional storage. The spectacular sunroom is off the kitchen and offers a soaring beamed ceiling, fireplace with stone surround, and multiple seating areas. There is also the added convenience of an additional powder room on this level for guests. One of the most notable features of this spectacular residence is the extraordinary primary suite, located on the second level. A private sitting room in the suite provides access to two separate marble bathrooms, both with accompanying dressing rooms. The bedroom is spacious and light-filled and affords a private laundry room for added convenience. Three additional bedrooms and two bathrooms are found on the second level, while the third level offers two more bedrooms and a full bathroom. The exceptional lower level includes a spacious recreation room which conveniently walks out to the rear terrace and yard. There is also game area, full bathroom, renovated mudroom with abundant storage and laundry, wine room, a one-car garage, and a separate two-car garage. The two-car garage also provides access to a fabulous office/studio with a fireplace and walls of windows with French doors to the rear garden. The rear exterior is beautifully landscaped, featuring two large flagstone patios with stone wall surround, ideal for large entertaining, and a play area.