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Classic 12-unit prewar walkup co-op in prime Park Slope with high ceilings, hardwood floors, and exposed brick. Shared roof deck with harbor and Manhattan skyline views, steps from Prospect Park and F/G/R trains.
420 Sixth Avenue is a 12-unit, self-managed co-op housed in a classic prewar walkup building in the heart of Park Slope. Located on a tree lined block directly across from PS 39 and the Brooklyn Public Library, the building sits within easy reach of the F/G/R trains at 9th Street, one to two blocks from Prospect Park, and close to the shops and restaurants along 5th and 7th Avenues. The building was converted from rental to co-op under a non-eviction plan, meaning some rent stabilized tenants remain in place.
Most units are two bedroom, one bathroom layouts featuring classic prewar details including high ceilings, original wide plank hardwood floors, exposed brick walls, and decorative fireplaces with soapstone or marble mantles. Bay windows appear in several apartments, and windowed kitchens typically include stainless steel appliances, granite countertops, and maple or custom cabinetry. Many units offer flexible layouts with dining rooms that can double as home offices or third bedrooms. Storage is generally ample, with walk in closets in some units and built in storage solutions throughout.
The building's standout amenity is a shared roof deck offering expansive views of the harbor, Manhattan skyline, and Statue of Liberty. Additional amenities include on-site laundry, basement bike storage, dedicated storage cages for each unit, and a communal stroller bin. A new roof was recently installed, and plans are underway to rebuild the common roof deck. At least one unit has received board approval for an in-unit washer/dryer.
The building is cat friendly but does not permit dogs. As a self-managed co-op, there is no flip tax, though subletting is not allowed. Board approval is required for certain modifications like installing washers and dryers. The combination of prewar charm, practical amenities, and prime Park Slope location makes this a solid option for those seeking classic Brooklyn living.
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For some co-ops, instead of price per square foot, we use an estimate of the number of rooms for each sold apartment to chart price changes over time. This is because many co-op listings do not include square footage information, and this makes it challenging to calculate accurate square-foot averages.
By displaying the price per estimated room count, we are able to provide a more reliable and consistent metric for comparing sales in the building. While we hope that this gives you a clearer sense of price trends in the building, all data should be independently verified. All data provided are only estimates and should not be used to make any purchase or sale decision.
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