Welcome to a masterpiece of modern elegance, just moments from Rosemead Park and Valley Blvd. This stunning duplex redefines luxury living and is a true sanctuary for discerning homeowners. Main Residence (4250 Arica): Enter through a majestic custom iron double doors into an expansive foyer that boasts soaring ceilings and a breathtaking hand-painted dome, adorned by the elegantly spiraling staircase, setting the tone for the grandeur that awaits. This magnificent 2-story estate features 4 opulent bedrooms and 4 lavish baths, complemented by an attached 2-car garage, equipped with EV charger. The formal dining room, with its coffered ceiling and exquisite wall paneling, doubles as an elegant home office. The chef's kitchen is a culinary dream, featuring an oversized waterfall island, premium high-end appliances, and custom white shaker cabinetry. The downstairs master suite offers a tranquil retreat, complete with three spacious closets and a luxurious stand-up shower. Ascend the stunning spiral staircase, adorned with custom iron handrails, to discover a versatile loft space and an elegant master suite, featuring a walk-in closet and a spa-like modern master bath. Upstairs includes three bedrooms and 2 full baths. Guest House (4252 Arica): This distinguished detached ADU features 2 generously sized bedrooms and 2 baths, along with its own attached 2-car garage. Ideal for guests or as a lucrative rental opportunity, it is equipped with separate meters for electricity, water, and gas. This extraordinary property is surrounded by a manicured lawn and a lush rose garden, perfectly situated in the city of Rosemead. Mature trees provide restful shade, while a stunning stone lion fountain is nestled among the roses. This estate harmonizes contemporary sophistication with timeless elegance, offering a lifestyle of unparalleled luxury. Don't miss your chance to own this exceptional home--schedule your private tour today!