421 Park Ave, Unit B - New Construction Townhome. Introducing Parkside Luxury Residences - Clarendon Hills. This exclusive collection includes six luxury townhomes ideally situated facing Park Avenue Park. Located in the heart of Clarendon Hills' sought-after walk-to-town neighborhood, offering the rare combination of luxury, space, and maintenance-free living-just steps from dining, shopping, the Metra, and vibrant community life. With over 3,500 SF of interior living space and over 400 SF of private outdoor space, including an in-unit elevator, each level offers effortless accessibility. Featuring 5 bedrooms, 4 full bathrooms, and 1 half bath. Offering a private exterior entrance, the main level features a home office, full bathroom, mudroom, and attached extra-wide 2-car garage with exterior guest parking. The second-floor stuns with a chef's kitchen outfitted with custom cabinetry, quartz countertops, Kohler plumbing fixtures and a suite of Sub Zero Wolf appliances including a 48" range, 30" paneled refrigerator and separate freezer, and a pot filler over the cooktop. The adjacent scullery features a beverage fridge and coffee bar and a walk-in pantry. A spacious dining room, great room with limestone-surround fireplace, powder room, and a balcony with park views complete this light-filled level. Upstairs, the third floor offers three bedrooms, including a luxurious primary suite overlooking the park, a spa-inspired ensuite bath, and a custom walk-in closet. Two additional bedrooms, a second full bathroom, and a laundry room round out the space. The fourth floor delivers the ultimate additional flex space-perfect for a second office, guest suite, or fifth bedroom-alongside a bathroom and a 400 sq ft rooftop deck overlooking the park. With composite decking, TV and speaker pre-wiring, and park views, this rooftop is the ideal setting for entertaining or unwinding. UPGRADES FINALIZED AS OF JULY 2026 - including a full bathroom and hardwood flooring on the 4th floor for flex room, heated primary bathroom floors, upgraded lighting throughout, custom built-ins in the family room, and white oak rift cut millwork on the kitchen island, vanity, and additional built-ins. From the timeless craftsmanship to the thoughtful layout and unmatched location, Parkside Luxury Residences redefine what it means to live well in Clarendon Hills.