This beautifully restored 18-foot-wide, 49-foot-deep Italianate townhouse blends historic charm with modern updates across three levels plus a finished basement. Configured as a two-family, it offers an owner’s upper duplex and an income-producing garden apartment. The parlor floor features high ceilings, tall windows, and hardwood floors. A bright living room flows into a spacious dining area and a renovated kitchen with stainless steel appliances, dishwasher, and excellent storage. The open floor plan also includes a discreet powder room. A rear deck overlooks the landscaped backyard with stairs for easy outdoor access. The bedroom level includes a generous primary suite with private balcony, a second bedroom with exposed brick, a flexible home office or nursery, and two full baths. Laundry is conveniently located in the hallway just outside the bedrooms, near the stairs that lead to the roof — offering excellent potential for a private roof deck. The garden apartment offers a generously sized one-bedroom layout with separate kitchen, large living/dining room, and direct access to the backyard — ideal for rental income, guests, or extended family. It also contains its own laundry facilities. The finished basement provides a large recreation/media room, powder room, and extra storage, adding valuable flexible space to the home. Located just east of Pratt Institute and the Clinton Hill Historic District, 64 Kosciuszko Street is moments from neighborhood cafés, restaurants, and multiple subway lines while retaining the quiet charm of a tree-lined Brooklyn block. With its classic brick façade, multiple outdoor spaces, and practical layout, this is a rare opportunity to own a deep, move-in-ready townhouse with charm, flexibility, and income potential.