This stunning 5,100± sq. ft. Colonial sits on 2.53 acres with preserved land behind, offering elegance and flexibility for multi-generational living. The main home features 4 bedrooms, 3.5 baths, and a newly updated gourmet kitchen with solid wood cabinetry, granite counters, and premium JennAir appliances. A spacious family room with fireplace, formal living and dining rooms, office, and renovated primary suite with spa-like bath complete the main level. The finished lower level adds recreation space, full bath, and storage. Connected by a breezeway, the 2,100 sq. ft. in-law suite offers 2 bedrooms, 2 full baths, dramatic living areas, and private patio. Outdoors enjoy a saltwater pool, two-tier Trex deck, and fenced, landscaped grounds—luxury and versatility in Millstone.