Welcome to 4856 18th Ave SW, a spacious 4-bedroom, 3-bathroom home offering 2,190 square feet of versatile living space in West Seattle's Riverview neighborhood. The upper level features three bedrooms, two full bathrooms, a well-appointed kitchen with stainless steel appliances, vaulted ceilings, a gas fireplace, and a deck overlooks the front yard and driveway. The ground-level ADU offers a separate entrance, full kitchen, great room, bedroom, and full bathroom, creating a flexible option for guests, extended living arrangements, or additional space. Two separate laundry areas, each with its own washer and dryer set, add everyday convenience. Enjoy a large backyard, oversized two-car garage, and access to each living level. Adjacent to open space, this property combines functional design with a peaceful setting while offering easy access to the best of West Seattle, with nearby parks, shops, dining, and neighborhood amenities. A unique opportunity to enjoy flexible spaces, thoughtful amenities, and room to make the home your own. Bus Route 125 stops at the end of the street and runs directly to Downtown Seattle at 3rd & Pike, providing a convenient 10-minute bus ride to Lumen Field, WAMU Theater, and T-Mobile Park. Seller pre-inspection available by request. Mortgage savings may be available for buyers of this listing.