3400 Osage Street 3400 Osage St, St. Louis, MO is a rental apartment building with 2 floorplans available. It is located in the Dutchtown South neighborhood of St. Louis. It has apartment amenities including hardwood floor, air conditioning, balcony, fireplace, and dishwasher. It has building amenities including garage parking, business center, concierge service, dry cleaning service, and residents lounge. Cats and dogs are allowed, making it a pet-friendly building.