423 15th Street is a prewar co-op built in 1920 in the heart of Park Slope, situated on a tree lined block between Eighth Avenue and Prospect Park West. The four story walk-up contains 16 units and stands out for its well managed financials, including no underlying building mortgage and low monthly maintenance. The intimate scale means neighbors know each other by name, while professional management ensures the building runs smoothly.
Units range from one to three bedrooms and share several distinctive features that appear consistently throughout the building. Nearly all apartments include in-unit washer/dryer, a rarity for Park Slope co-ops, along with exposed brick walls, high ceilings ranging from 9 to 10 feet, and hardwood floors. Many units feature open concept layouts with renovated kitchens equipped with stainless steel appliances and dishwashers, while windowed bathrooms add natural light. Recent renovations have brought modern touches like Miele and Bosch appliances, induction cooktops, and contemporary fixtures to select units.
Building amenities include a shared garden tucked behind the building, bike storage, stroller parking on the first floor, and private basement storage of approximately 40 to 50 square feet per unit. The pet friendly policy welcomes dogs, adding to the building's appeal for a range of residents. The location delivers exceptional convenience, positioned just half a block from both Prospect Park and the F/G trains, with easy access to the B61 and B68 buses.
The surrounding neighborhood offers an abundance of dining, shopping, and recreation options. Residents enjoy proximity to the Park Slope Armory YMCA, Nitehawk Cinema, and the Bartel-Pritchard Square Greenmarket (operating Wednesdays and Sundays). Popular local spots include Talde, Connecticut Muffin, and the Pavilion Theater, while both 7th and 8th Avenues provide additional cafes, restaurants, and boutiques within easy walking distance.
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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.