4582 4th Street The Ultimate Coastal Sanctuary | Custom Duplex with Panoramic Ocean & Mountain Views Welcome to your rare coastal retreat in the heart of charming Carpinteria. Custom-built and meticulously maintained, this dual-residence property offers over 3, 600 square feet of endless versatility-perfect for multi-generational living, live-in rental income potential, or a high-value investment. The Third-Floor Crown Jewel Soaring tongue-and-groove wood ceilings, rich Saltillo tile, and warm architectural detail throughout the main living areas. A chef's kitchen featuring rich soapstone countertops, a classic farmhouse sink, and ample custom pull-out cabinetry. A versatile guest bedroom complete with a custom built-in Murphy bed, desk, and storage-ideal for a home office or flex space. The Primary Oasis & Rooftop Deck The expansive primary suite features rich hardwood floors, a built-in entertainment center, a walk-in closet, and a spa-like en-suite bath. Step directly from your bedroom onto a private hardwood rooftop deck. Unwind in the hot tub while taking in sweeping, 360-degree panoramic views of the Pacific Ocean and the iconic Rincon Mountains. The Second-Floor Residence Modern, bright, and expansive with over 1, 800 sq. ft. of updated living space. 3 spacious bedrooms with oversized closets and 2 full bathrooms. A recently remodeled kitchen showcases sleek quartz countertops and stainless steel appliances (refrigerator, stove, microwave, dishwasher). Includes in-unit washer/dryer hookups and a massive private deck perfect for outdoor relaxation. Whether you're sipping morning coffee overlooking the waves or unwinding in the evening mountain breeze, opportunities to own a custom duplex of this scale in Southern California's premier beach town are exceptionally rare.