Exquisite Spanish Colonial Estate in Arlington Heights. Nestled in the heart of Arlington Heights and tucked away for exceptional privacy, this remarkable Estate overlooks the City of Riverside, offering breathtaking views of the City & palm trees lining Victoria Ave. Set on 3.77 acres of private, fenced, and gated grounds, this is a rare estate property showcasing expansive open land, mature landscape and established trees. Circular driveway with pavers leads to the residence, enhancing its grand yet secluded presence. Spanning 4,667 square feet, the home features 5 bedrooms and 3.5 bathrooms, including two primary suites, thoughtfully designed for flexibility, comfort, and multigenerational living. Architectural elegance is evident throughout with arched walkways, a dramatic double-door entry, and expansive windows in every direction that flood the home with natural light and capture sweeping views. The interior has been completely updated and remodeled, offering large porcelain tile flooring and plank wood flooring throughout. Formal living and dining rooms provide sophisticated entertaining spaces, while the heart of the home is the gourmet kitchen, open to the family room with a wood-burning fireplace. The kitchen features an expansive center island, quartz countertops, stainless steel appliances, pot filler, professional-series range with double convection ovens, built-in 60-inch refrigerator, and a large walk-in pantry. Sliding glass doors open to the back patio, creating a seamless indoor-outdoor living experience and extending the interior living space. A private upstairs office offers a quiet retreat for work or study. Downstairs, all five generously sized bedrooms are thoughtfully located. The primary suite is its own private wing, accessed through double doors with a private office. Complete with a wood-burning fireplace, dream walk-in closet, and a luxurious ensuite bathroom featuring dual sinks, a freestanding soaking tub, and a separate shower enclosure. French doors lead directly to the private back patio, enhancing the resort-like feel. Also on the lower level is a second living room or game room with its own wood-burning fireplace, three additional guest bedrooms, and a second primary suite, perfect for extended family or guests. The outdoor space is a true private oasis, featuring a resort-style pool and spa, a private outdoor kitchen, and expansive patio areas ideal for entertaining or relaxing. Completing the property is a detached three-car garage. Conveniently located close to freeways, top-rated schools, and Victoria Country Club, this exceptional estate offers timeless Spanish Colonial charm, modern luxury, privacy, and unparalleled lifestyle living in one of Riverside’s most sought-after neighborhoods.