Welcome to 829–831 Avalon Court in South Mission Beach – Bayside! First time ever on the market. The owners custom built this Mid-Century Modern Gem with a THREE CAR GARAGE! A rare two-unit coastal property just steps from the bay & a short stroll to the beach—perfectly positioned on this 2400 sq. ft. lot. You will enjoy sunsets & beachside living. The spacious ground-level unit features 1 bedroom, 1 bath, approximately 731 sq. ft. with a huge patio! The upper unit offers an open, light-filled floor plan spanning an estimated 1,431 sq. ft., with 3 bedrooms and 2 baths. All bedrooms are well-proportioned, and the primary suite includes a private en-suite bathroom and walk-in closet. Inside of both units are immaculate, with updated bathrooms, oversized kitchens and open living area create an inviting space ideal for entertaining. The generously sized bedrooms provides ample storage and comfort. Abundant storage throughout enhances everyday functionality. A shared attached three-car garage adds exceptional value and convenience, complete with a washer and dryer, plus an additional storage shed located beneath the stairs. Huge front patio—perfect for entertaining, relaxing, & soaking in San Diego’s year-round coastal climate. Ideally located within walking distance of the area’s most popular restaurants, shops, the boardwalk, playgrounds, and South Mission Beach Park, this exceptional property offers a rare opportunity for investors or owner-occupants in one of San Diego’s most desirable neighborhoods! Prime opportunity to potentially add a roof top deck for panoramic views!