Welcome to the luxurious Estrella-Callisto by Toll Brothers, the largest floor plan in the Guard-Gated Luxury community of Altair, surrounded by the rolling hillsides and panoramic vistas of Orange County with an abundance of resort-style amenities. Expansive great room, private office, dining room, and an enclosed California room for indoor/outdoor living. HIGHLY UPGRADED = Custom wide format European Oak Flooring has been meticulously laid out in staggered and herringbone patterns complemented with built in designer Gold Accents throughout the first floor and matching wide grand staircase! Custom white designer wall treatments throughout, and a large great room featuring a built-in surround sound system + custom large TV frame above the modern fireplace. The well-equipped gourmet kitchen features an enormous king-sized center island with wraparound breakfast bar, high-performing Wolf appliances and designer two-toned wood paneling on 60in Dacor refrigerator (w/ built-in wifi camera, push to open door assist, dual ice maker with cocktail ice, and water dispenser). Large walk-in pantry and an appealing butler pantry for discreet access to the formal dining room. One guest suite and an additional office downstairs. Ensuite bathrooms in every room. Indulge yourself in the well-appointed master suite with a spacious retreat, custom walk-in closet & spa-like master bath with dual vanities, soaking tub and large glass paneled shower area. Expansive 10' x 24' glass stacking doors, by Western, allows for seamless indoor/outdoor living. The beautifully appointed patio is perfect for relaxing or entertaining = beautiful water fountain, large designer stone fireplace, built-in bbq + entertaining area, and large shaded trellis! Lots of trees and lush vegetation, plenty of shade and privacy. Conveniently located to the award-winning Portola High School and Cadence Park Elementary & Middle school. Easy access to I-5, I-133 and shopping malls. Welcome Home!