Beautifully upgraded home located in the sought-after Castellon neighborhood of Serrano Summit. This residence features luxury vinyl wood-style flooring, custom paint, smart home features, tankless water heater, and leased solar panels. The open floor plan includes a great room, dining area, and modern kitchen with quartz countertops, shaker-style cabinetry, upgraded backsplash, and GE Café stainless steel appliances. Sliding doors open to a private tiled patio with mature landscaping. The first floor offers a guest bedroom/office with full bath. Upstairs, the primary suite includes a spa-inspired bath with soaking tub, dual vanities, walk-in shower, large walk-in closet, and a covered balcony with custom sun blinds. A secondary bedroom, loft, and laundry are also located on the second level. The third floor features a spacious bonus room with half bath, built-in cabinets, and mini refrigerator. Additional highlights include a two-car attached garage with storage racks and HOA-maintained front landscaping. Community amenities include clubhouse, resort-style pool, spa, pickleball courts, barbecue areas, and parks. No Mello-Roos. Conveniently located near Irvine, Great Park, and Spectrum.