Nestled on a quiet hillside court in a desirable neighborhood, 1509 Lassen Court offers privacy, beautiful surroundings, and a true sense of community. The home features five bedrooms, ideal for comfortable living, remote work, or multi-generational needs. Recent updates include a new roof and gutter system, newly paved driveway, refreshed landscaping, brand-new range, ample kitchen cabinetry, fireplace, and beautiful hardwood flooring throughout. A rare and unique feature is the concealed lower-level space beneath the home, built entirely of solid concrete and accessed by an interior stairway. This approximately 10' x 20' room with approximately 7.5-foot ceilings and ventilation offers incredible flexibility-perfect as a wine cellar, media retreat, hobby room, safe room, studio, or additional storage. Enjoy partial city views and a covered backyard patio ideal for relaxing or entertaining. Conveniently located near schools, shopping, Mare Island, and freeway access. (Some photos have been virtually staged.)