Welcome to 5525 Costello Avenue, nestled in the highly desirable Chandler Estates area of Sherman Oaks. This updated residence offers the rare opportunity to own a home with a detached, permitted 1-bedroom, 1-bath ADU with its own address (5527 N Costello Ave). Set on a spacious lot in one of Sherman Oaksâ��™ most coveted neighborhoods, this home offers the perfect blend of comfort, versatility, and California living. The private backyard is designed for year-round enjoyment, featuring a sparkling pool, expansive patio space, and the perfect setting for entertaining and relaxing. The detached ADU provides exceptional flexibility for multigenerational living, guest accommodations, a private home office, or rental income potential. Conveniently located just minutes from Ventura Boulevard’s premier dining, shopping, entertainment, parks, and top-rated schools, with easy access to major freeways.