Rare opportunity to own entire 4th floor of this charming 9-unit boutique elevator building, tucked away on historic Astor Street. Separated only by a common elevator foyer, 4A: Large one-bedroom features idyllic bow windows overlooking tree-lined and historic Astor Street. Expansive living/dining room features hardwood flooring, wood burning fireplace, open to wonderful kitchen designed with custom cabinetry, stainless steel appliances, stone counter tops, generous storage, and extended pass through. En-suite bedroom accommodates king-size bed, and spa bathroom with oversized shower, long vanity with stone countertop, accented with elegant mirror, sconces and hardware. In-unit washer-dryer. 4B: Expansive 2bedroom/2bath features wonderful balcony overlooking the Gold Coast's tree tops, directly off of living room, which contains wood burning fireplace accented by antique mahogany mantle, and hardwood flooring. Separate dining room flows to elegant kitchen designed with custom cabinetry, SubZero refrigeration and wine, Wolf cooktop, Miele dishwasher, dedicated pantry, accented with handmade tile backsplash. The en-suite primary bedroom delivers dreamy closet, with glass doors and interior lighting, leading to spa bathroom. Large second bedroom, second modern bathroom, and laundry room complete this gem, with low monthly assessment. Steps to lakefront, park, dining, shopping, and everything the neighborhood has to offer!