House / ADU / Guess Room. Nestled in a peaceful, natural enclave of Shadow Hills, 9790 Shadow Island Drive offers a versatile hillside retreat situated on an expansive 19,202-square-foot lot. Spanning approximately 1,600 total square feet of updated living space, the property features a primary single-story residence with 2 bedrooms and 2 bathrooms. Complementing the main home is a converted garage serving as a self-contained 1-bedroom, 1-bathroom ADU, alongside an extended deck suite featuring an additional 1-bedroom, 1-bathroom setup, providing impressive overall versatility for multigenerational living arrangements or creative space needs. The entire property benefited from comprehensive upgrades within the past year, and modernized interior finishes throughout. Outside, the private, tree-lined grounds afford exceptional tranquility and room to entertain, garden, or relax. Ideally located near Foothill corridors and local amenities, this unique compound provides secluded, retreat-style living with smooth access to greater Los Angeles. Please note public assessor’s record reflects 2b ,2b and 1,344 sqfts.