A classic custom-built 4-bedroom, one of a kind, Colonial in the heart of East Setauket, offering both traditional charm and exceptional flexibility. This well-maintained home features a 5-room professional office suite, ideal for a home business, studio, or conversion into a private apartment or expanded living space. Set on a shy 3/4 acre property, this impressive 3,800-square-foot home welcomes you with a beautiful two-story entry foyer, elegant architectural details, and custom molding throughout the first floor. Spacious rooms, abundant natural light, and a flexible floor plan make it ideal for today's lifestyle, whether for multigenerational living, working from home, or accommodating extended guests. Additional highlights include hardwood floors on the 1st floor, an oversized two-car garage, and a full, partially finished basement, providing exceptional storage and endless possibilities for future living or recreational space. With its versatile layout, prime location, and rare professional-use potential, this home presents an outstanding opportunity for buyers seeking both comfort and functionality. Located in the Three Village School District, this home is just 4 miles from Stony Brook University and Hospital, 5 miles from West Meadow Beach, and 3 miles from the LIRR, offering convenient access to education, healthcare, recreation, and commuting.