Discover a rare combination of privacy, space, and walkability at 518 Sheffield Avenue, ideally positioned in Cardiff's sought-after Composer District. Set behind an automatic privacy gate on a quiet, low-traffic street west of I-5, this expansive 6-bedroom, 4.5-bath residence offers approximately 3,826 square feet designed for comfortable everyday living, entertaining, and flexibility. Inside, abundant natural light and generous living spaces create an inviting sense of openness. A main-level en-suite bedroom provides an ideal setup for guests, multigenerational living, or a private retreat, while the remaining bedrooms are thoughtfully located upstairs. The spacious primary suite features dual walk-in closets and a large bath, creating a peaceful escape at the end of the day. At the heart of the home, the upgraded kitchen features a Sub-Zero refrigerator, butler's pantry, and effortless connection to the surrounding living and entertaining spaces. Fireplaces in the living room, family room, and primary bedroom add warmth and character throughout. Outdoor living is equally impressive. A private courtyard and landscaped backyard offer multiple spaces to gather, dine, and unwind, complete with a fire pit, fountain, pergola, and built-in BBQ. And perhaps the greatest luxury is the location. Enjoy convenient trail access to Encinitas Community Park and easy proximity to Seaside Market, Cardiff Elementary, neighborhood restaurants and shops, and the beaches and surf that define the Cardiff lifestyle.