Perched in the sought after Greenridge neighborhood of Castro Valley, this exceptional single level residence offers breathtaking 360 degree views of sparkling city lights and Bay waters, creating a captivating backdrop from day to night. Inside, the thoughtfully designed kitchen features custom bamboo cabinetry and stone countertops, while the dramatic living room showcases soaring vaulted ceilings with exposed beams, a welcoming fireplace, and dual sliding glass doors that seamlessly connect to the expansive outdoor living spaces. Step onto the oversized deck and take in the remarkable hillside setting before descending into an enchanting garden retreat. Meandering terraced pathways are surrounded by colorful florals, mature landscaping, and fruit-bearing trees, including Meyer lemon, apple, and pear. A dedicated area with existing water and electrical connections, previously used for a greenhouse, offers exciting possibilities for gardening and future outdoor projects. Adding tremendous versatility is a private ADU with its own entrance, kitchen, full bathroom, and separate balcony overlooking the beautiful surroundings. Ideal for extended stay guests, potential rental income, a private office, or creative space. Beneath the main deck, a spacious walk-in crawl space is currently configured as a workshop with room for large tools, equipment, and substantial storage. Recent improvements include a brand-new roof, upgraded electrical throughout, drainage improvements, and fresh interior and exterior paint. With panoramic views, single level living, flexible ADU accommodations, extraordinary outdoor spaces, and a magical garden setting, this distinctive Greenridge property is a rare Castro Valley opportunity.