401 Washington 401 Washington Ave, Santa Monica, CA is a rental apartment building with 2 floorplans available. It is located in the Wilshire-Montana neighborhood of Santa Monica. It has apartment amenities including assigned parking, in-unit laundry, on-site laundry, dishwasher, and balcony. It has building amenities including elevator, controlled access, and on-site laundry. Cats and dogs are allowed, making it a pet-friendly building.