253 21st Street is a 20-foot-wide, three-family townhouse located in prime Greenwood. Meticulously maintained and thoughtfully upgraded by the same family for decades, this 100-foot-deep property is currently configured as a spacious two-family and offers a perfect blend of original charm, modern systems, and flexible living options. The primary owner's duplex spans the garden and parlor floors and features a flowing layout ideal for everyday living, entertaining, and working from home. On the garden level, you'll find a large living room with a decorative fireplace and original mantle, a renovated kitchen with an L-shaped island and ample storage, a full-sized dining area, and a full bathroom with a shower. This level also has a dedicated split A/C system. From the kitchen, step out onto a wood deck that leads to an extra-deep backyard-a rare open-air space perfect for entertaining, al fresco dining, or simply relaxing in the privacy of your own outdoor retreat. Upstairs on the parlor level, the king-size primary bedroom features an original marble mantle and decorative fireplace, along with a spacious walk-in closet. Two additional king-size bedrooms, a full bathroom, a laundry room, and a second split A/C system make this level both functional and elegant. The top floor hosts a renovated one-bedroom apartment, full of natural light and original details. This unit includes an open kitchen with a tin ceiling and treetop views, a generously sized living area, a king-size bedroom with a decorative fireplace and original mantle, a walk-in closet with a skylight, and a washer/dryer hookup. It's ideal for rental income, guest accommodations, or a private home office. Modern upgrades throughout the property include updated electric and plumbing systems, a newer roof, split A/C systems on both duplex levels, and a pristine basement with two means of egress and a spotless mechanical room. Set on a quiet, tree-lined block, 253 21st Street is nestled in Greenwood Heights-one of Brooklyn's most charming and under-the-radar neighborhoods. Enjoy a peaceful residential feel with convenient access to Park Slope, South Slope, and Sunset Park. The R train at 25th Street is just a few blocks away, and local favorites such as Sea Witch, Greenwood Park, Roots Caf , Lot 2, and Baked in Brooklyn are nearby. You'll also be close to Greenwood Cemetery, Prospect Park, and Industry City. Whether you're seeking a home with rental income or a flexible multi-unit layout, 253 21st Street offers space, versatility, and lasting value in a vibrant Brooklyn enclave.