856 Harness Discover elevated Norco Hills living in this stunning estate on an expansive 0.51-acre corner lot in a quiet cul-de-sac. Offering approximately 3, 895 sq ft, this beautifully updated home features 5 bedrooms, a spacious bonus room, and 3.5 bathrooms, including a main-floor bedroom and bath ideal for guests or multigenerational living. A standout feature is the generous usable lot with room to build an ADU and/or add horse corrals, offering exciting possibilities for extended living, equestrian use, a guest retreat, or workspace, subject to applicable approvals and zoning. Inside, soaring cathedral ceilings and freshly painted interiors and exteriors create a bright, inviting atmosphere. The formal living room flows into the dining room through custom barn doors, while the family room features a cozy fireplace, hearth, and built-in media niche. The chef-inspired kitchen showcases stainless steel appliances, double oven, 5-burner cooktop with hood, granite breakfast bar island, quartz countertops, subway tile backsplash, pantry, and coffee bar. Additional upgrades include wood-look plank tile flooring, luxury vinyl plank upstairs, window shutters, and a sweeping staircase. Upstairs, the spacious primary suite features double-door entry, fireplace, private sitting area, dual mirrored walk-in closets, and an upgraded bath with quartz counters, deep soaking tub, and oversized walk-in shower. The backyard is designed for entertaining, featuring newly laid grass sod, numerous fruit trees, blooming Plumerias, Alumawood patio cover, flagstone-accented pool and spa, firepit, BBQ island, and sports court. Additional highlights include RV parking, 4-car garage, and solar system. Conveniently located near parks, shopping, schools, and freeway access, this exceptional property offers the perfect combination of luxury, usable land, outdoor enjoyment, and future possibilities. Offered at $1, 399, 900-an exceptional opportunity to own a Norco Hills estate with resort-style amenities, ADU and equestrian potential, and room to create the lifestyle you've been looking for.