Rare Mercer Island land opportunity! This expansive 18,637 SF lot sits quietly next to Pioneer Park, offering a peaceful, wooded backdrop and exceptional privacy. Preliminary plans for a 6,000+ SF custom home are available, and the seller will provide all existing site studies—including boundary and topographical survey, arborist report, geotechnical survey, and more. The sellers are not pursuing permitting and will not be engaging with the city, giving buyers the flexibility to build according to their own vision and timeline. Whether you're a builder, investor, or future homeowner, this competitively priced parcel presents a unique chance to develop something extraordinary in one of the most desirable locations on the Island.