Rare vacant-at-close Outer Richmond duplex just blocks from Ocean Beach and Golden Gate Park. 546-548 41st Ave is a classic 1927 two-unit building featuring two full-floor 2BR/1BA flats, extensive period detail, an expansive garage/basement level, and a deep shared garden. Spanning approximately 2,850 sq. ft. on a 3,000 sq. ft. lot per tax records, the property offers compelling flexibility for owner-users, investors, multi-generational living, or long-term legacy ownership in one of San Francisco's most desirable coastal neighborhoods. Both residences showcase hardwood floors, decorative fireplaces, built-ins, French doors, formal dining rooms, original wood trim, and large bay windows that bring in abundant natural light. The upper flat features a refreshed kitchen with shaker cabinetry, stone countertops, generous workspace, and peek-a-boo ocean outlooks. The lower flat offers similar scale, charm, and versatile living spaces with opportunity for future personalization. Expansive garage and basement areas provide exceptional storage, workshop, hobby, utility, or potential expansion flexibility, subject to buyer investigation. The deep shared backyard includes mature landscaping, garden pathways, and space for outdoor dining, gardening, entertaining, pets, and everyday enjoyment. Excellent Outer Richmond location near Ocean Beach, Golden Gate Park, Lands End, Sutro Heights, Lincoln Park Golf Course, Legion of Honor, local cafes, restaurants, markets, schools, and Geary Blvd transit corridors.