Rare opportunity to own a stunning, south-facing 3-acre homesite in the highly sought-after Tiger Mountain area of Issaquah, offering private backyard access to the entire network of local hiking, biking, and horseback riding trails. This exceptional property offers an incredible head start toward building your dream estate, with extensive due diligence already completed. Included are approved septic design for a 4-bedroom home, Critical Area Designation (CAD) approval from King County, geotechnical report, water availability certificate, civil engineering drainage report, and stamped architectural and engineering plans for a spectacular 5,200 sqft, 4 bed, 4 bath custom residence with a 4-car garage. A completed buffer averaging plan further expands the building envelope. Enjoy the beauty of a year-round spring-fed creek winding through the property, creating a private park-like setting unlike any other. No flood plains. Whether you're a developer or discerning buyer seeking a custom luxury retreat, this one-of-a-kind property offers the perfect blend of privacy, natural beauty, and convenience just minutes from parks, highways, and top-rated Issaquah schools.