853 Oak Brand-new luxury home with ADU, completed January 2026. This custom-designed single-family residence is a true modern gem, standing apart from anything else on the market. Offering 4491 sqft living space. The main home is 3291 sqft and ADU is 1200 sqft. The main House features 4 spacious master bedrooms, each with custom-built closets, including one primary suite on the main level. The open-concept layout showcases high ceilings, abundant natural light, and a sleek modern aesthetic. The stunning custom kitchen includes hidden kitchen, brand-new high-efficiency appliances, and premium finishes throughout. A large loft with balcony access adds flexible living space. Enjoy a private backyard ideal for entertaining and everyday living. 3 car garage and a great quiet neighborhood just minted from the beach. The fully separate ADU has a separate entrance offer. It is 1, 200 sqft open floor plan with 2 master bedroom upstaris perfect for rental income, extended family, or multigenerational living. A rare opportunity to own a one-of-a-kind modern luxury property combining design, space, and versatility in city of Costa Mesa.