Extremely rare to the market, this updated multi-generational residence at 426 Grant Street in Oceanside offers exceptional scale, flexibility, and coastal proximity just blocks from downtown and under a mile to the beach and pier. With 9 bedrooms and 6 bathrooms, the home is thoughtfully designed to accommodate a variety of living arrangements, from extended family living to income-producing opportunities. The property has been expanded and updated, creating a layout that allows for both connection and separation, with multiple private entrances providing flexibility for independent living spaces while maintaining a cohesive overall design. The interiors reflect a clean, refreshed aesthetic with stainless steel appliances, granite countertops, custom tile work, recessed lighting, and updated bathrooms. Designed with functionality in mind, the home supports everyday living across multiple zones, offering versatility for multi-generational households, guest accommodations, or rental potential. Additional features include a private balcony and two attached 2-car garages providing ample parking and storage, a rare offering for a property of this scale in such a central location. Set within one of Oceanside's most connected coastal neighborhoods, moments from restaurants, shops, transit, and the energy of downtown, this property offers a unique opportunity to own a spacious, adaptable residence in a location that continues to see strong demand and growth.