Welcome to 15860 Sunnyside Avenue! This four-bedroom, three-bathroom home was custom-built in 2000, and sits on 47,045 square foot lot with SB-9 potential. Offering 3,281 square feet of living space across two stories, the home features high ceilings, crown molding, dual-pane windows, and central heating and air conditioning. The entry showcases a formal living and dining room combo with a cozy gas fireplace. The kitchen includes an eat-in dining area that effortlessly flows into the family room. The main floor also includes a bedroom with an attached bathroom, and a laundry room with access to the three-car garage. Upstairs, a versatile loft can serve as a fifth bedroom, office, or entertainment area. You'll also find two large bedrooms and a luxurious primary suite with a walk-in closet and dual-sided gas fireplace. The expansive backyard features a pool with waterfalls, a spa, a large grass area, stone walkways, and an outdoor kitchen with a pergola. Play bocce ball on the court or cozy up around the gas fire pit. Explore the unique SB-9 possibilities for this property, which allow for the primary house plus a 1,600 square foot second house, a 1,200 square foot ADU, and a 500 square foot junior ADU... all without a lot split! This unique feature adds even more value to this already exceptional property!