Nestled on a quiet private lane just moments from Pioneer Park, this spacious Mercer Island home offers 4530 sq ft of thoughtfully designed living space with exceptional flexibility for today's lifestyle. The functional floor plan features four bedrooms, an office with built-ins, formal living and dining rooms and a versatile bonus room-offering comfortable spaces for living, working, relaxing, and entertaining. The expansive primary suite provides a peaceful retreat with a walk-in closet, private deck, and adjoining sitting room that easily serves as a second home office, reading lounge, fitness space, or nursery. Framed by peaceful territorial views of mature evergreens, it's a welcoming space to start and end each day. A standout feature is the private lower-level living suite, thoughtfully designed with its own bedroom, ¾ bath, full second kitchen, living area, and separate entrance. Ideal for multigenerational living, extended guests, live-in assistance, or a variety of other living arrangements; it offers privacy while remaining connected to the main home. Three levels of decks extend the living space outdoors, providing multiple places to relax, dine, or enjoy the peaceful natural setting. Ideally located near miles of scenic trails, award-winning Mercer Island schools, shopping, parks, and convenient access to both Seattle and the Eastside.