Secluded in the scenic hills of Upper Happy Valley, this Mediterranean villa is a private world of refined beauty and resort-style living. With 7,540 square feet in the main home and an additional 1,045-square-foot guest house, the property spans 3.23 acres of lush, landscaped grounds framed by sweeping views of the Lafayette hills and Mount Diablo. A secure gated entry opens to a 200+ foot driveway lined with mature palms and greenery, leading to a circular motor court. The estate feels worlds away—yet is minutes from downtown Lafayette. The home’s previous owner, noted interior designer Henry Conversano, designed and rebuilt the home in the 1990s and early 2000s. The property showcases a grand rotunda, soaring vaulted ceilings, hand-painted murals, and marble flooring throughout the common areas. Every room captures the timeless appeal of Mediterranean craftsmanship. A peaked wood ceiling crowns the living room, where walls of glass frame the pool and panoramic mountain vistas. A distinctive bar room evokes the ambiance of a club, complete with a bar and additional seating. The dining room, with its own beamed ceiling and seating for up to 12, flows into the rotunda. It’s an architectural centerpiece, ideal for music recitals or cocktail gatherings under a remarkable chandelier. From there, a spiral staircase leads upward to the library, a serene retreat equipped with custom shelving for treasured volumes. Nearby, a second spiral staircase leads to an impressive office suite, with dual workstations, generous storage space, and windows on three sides showcasing panoramic views, including one of Mount Diablo. The wood ceiling and four chandeliers lend a sense of grandeur. The chef’s kitchen is both beautiful and functional, equipped with top-tier appliances including a Sub-Zero refrigerator, Dacor range, indoor grill, dual ovens, and two dishwashers. Custom granite counters, fine cabinetry, and a breakfast nook for six overlook the pool and gardens. A mudroom with cabinetry connects the garage with the kitchen, ensuring that practicality and style comfortably coexist. The family room is designed for relaxed enjoyment, featuring a 7x12-foot projection screen on one side, and windows to the rear framing the surrounding gardens. The principal suite exemplifies tranquil luxury; it commands sweeping views of the deck, pool, and Mount Diablo. The spa bathroom features dual sinks, a soaking tub, and a shower with dual fixtures, while the walk-in closet provides extensive custom cabinetry and hanging space for any wardrobe. Another bedroom is essentially a second principal suite, secluded on the far side of the home for privacy, with access to the rear garden. Two additional bedrooms share a stylish Jack-and-Jill bathroom. One of these bedrooms—perfect for children—features built-in bunk beds and a dedicated desk area. The other adjacent bedroom opens directly to the garden: fountains, tropical landscaping, and massive deck space, with five distinct areas for entertaining or quiet relaxation. The sport court alongside can be configured for pickleball, paddle tennis, volleyball, or basketball. Across the courtyard, the guest house can be used as a yoga studio, home gym, or bedroom suite. The heated porch under a pergola can be enclosed for privacy, while the outdoor bar seats six beside a DCS grill—perfect for hosting guests. The pool, framed by panoramic views, features an automatic cover to keep heating costs low, and a hot tub tucked in one corner of the deck invites conversation and relaxation. The Spanish-tile roof is at once beautiful and fire resistant, and the Contra Costa County fire station is just down the hill. Set against a backdrop of natural beauty and privacy, 4146 Canyon is more than a home—it is a Mediterranean sanctuary designed for living beautifully and entertaining elegantly.