ABSOLUTELY STUNNING & TRULY ONE-OF-A-KIND! This exceptional residence in 'Siena' in Summerlin offers designer-quality finishes, an incredible floor plan, and a private backyard oasis designed for effortless luxury & entertainment. Every detail has been thoughtfully considered, both inside & out. The largest model, the "8120" offers approximately 3,217/sf with 3 bedrooms plus a private casita, 4 baths, and a dedicated den featuring custom built-ins. The casita is beautifully appointed with a custom Murphy bed & storage, creating a comfortable & highly functional private retreat for guests. Step inside to soaring elegance w/ marble flooring, coffered ceilings, a skylight, custom built-ins, and designer touches throughout. The spacious great room showcases beautiful built-in cabinetry, fireplace with a marble surround & a warm wood-beam ceiling. The gourmet kitchen is equally impressive, featuring rich cherry cabinetry, granite countertops, stainless-steel appliances, a custom bar-height counter with built-ins, butler pantry & an inviting nook area. Formal living & dining spaces provide additional room for entertaining. Outside, your own private resort-style retreat awaits, complete with a sparkling pool, spa, water feature, built-in BBQ, covered patio & deck. The beautifully landscaped, fully fenced rear creates a private & serene setting while offering stunning golf course, lake & mountain views - a picturesque backdrop that can be enjoyed through the large interior windows as well. Additional highlights - custom gated courtyard, faux sod, stamped concrete, flagstone accents, 3-car garage with epoxy flooring & custom cabinetry thoughtfully designed for maximum storage & organization, tankless water heater, water filtration & soft-water system, and alarm system. This extraordinary home also includes access to all of Siena's exceptional amenities, making it a truly special opportunity to experience refined living in one of Summerlin's most desirable communities.