Discover a rare investment opportunity on Iconic Balboa Island with this fully renovated coastal duplex at 104 Onyx Avenue. Featuring a lower unit (Cottage) and an elevated (Penthouse) Unit, both spaces exhibit thoughtful upgrades and refined finishes while preserving their beachside character. Designed with short-term rental success in mind, the property includes a coveted, transferable Newport Beach STR permit—an increasingly scarce advantage for investors seeking dependable income potential. Each unit is bright and inviting, with abundant natural light framing serene bay and Catalina views. The property showcases a modernized layout with updated kitchens, stylish baths, ample storage, and coastal-inspired interiors. Guests will enjoy a welcoming front patio surrounded by lush landscaping, offering the perfect setting for al fresco dining or morning coffee. Ideally located just one block from Marine Avenue, occupants are steps from boutique shopping, local cafés, and waterfront activities. This property combines income performance with lifestyle allure, making it an exceptional addition to any portfolio.