WELCOME TO 2943 SAN JUAN AVE IN THE HEART OF FULLERTON, A RARE OPPORTUNITY FEATURING AN APPROXIMATELY 1,671 SQ. FT. SINGLE-FAMILY HOME, A NEWER PERMITTED APPROXIMATELY 1,042 SQ. FT. ADU, AND EXCEPTIONAL FUTURE EXPANSION POTENTIAL, ALL SITUATED ON AN EXPANSIVE 17,710 SQ. FT. LOT. Offering approximately 2,713 sq. ft. of combined living space, this one-of-a-kind property provides exceptional flexibility for multigenerational living, rental income, or future possibilities. The beautifully maintained main residence offers approximately 1,671 sq. ft. with 3 bedrooms and 2 bathrooms. Inside, you’ll find a spacious living room with a cozy fireplace, an updated kitchen with a walk-in pantry, generous dining area, convenient indoor laundry, and abundant storage. The private primary suite includes an en-suite bathroom, while two additional bedrooms and a full bath complete the home. Privately positioned at the rear of the property, the approximately 1,042 sq. ft. permitted ADU, built in 2020, features 2 bedrooms, 2 bathrooms, a full kitchen, in-unit laundry, a walk-in closet, and an approximately 300 sq. ft. covered patio, making it ideal for extended family, guests, or rental income. Additional rear access from Harbor enhances convenience and future flexibility. Outside, a charming covered front porch overlooks a spacious patio, while the landscaped front yard features a private wood-fenced sitting area. The backyard is designed for entertaining with a covered patio, built-in BBQ, firepit, outdoor kitchen island, and expansive space for relaxing, recreation, or gardening. The oversized 17,710 sq. ft. lot offers exceptional versatility with room for RV, boat, and recreational toy parking, additional rear access from Harbor, a detached garage with storage, and exciting future expansion potential. Additional highlights include a Sunrun financed solar system installed in 2021 that helps reduce electricity costs. Homeowners also have the option to join the San Juan Community Club, offering a pool, tennis courts, pickleball courts, community holiday events, and neighborhood activities for approximately $700 annually. Ideally located minutes from shopping, dining, parks, Fullerton Golf Course, and everyday conveniences, this exceptional property offers the perfect combination of comfortable living, income potential, outdoor enjoyment, and long-term opportunity.