Welcome to one of the few truly custom estates in The Signature Collection, North Upland’s premier development. Designed by acclaimed Orange County builder Doyle Barker of the Jeffrey Group, this exclusive enclave of luxury homes represents the pinnacle of his work—and this particular residence was the original model, setting the standard for all that followed. From the moment you enter through the gated entry way, you are welcome by a flower garden, and step through the impressive double doors, you're greeted by soaring 20-foot ceilings and a dramatic sense of nearly six thousand square feet of interior space. Gleaming marble floors flow through much of the lower level, enhancing the grandeur of the expansive foyer, which opens seamlessly to both the formal living and dining rooms. A standout feature of this estate is the remarkable library—complete with a rolling ladder that accesses the upper shelves, ideal for displaying books or cherished collectibles. This inspiring space also functions beautifully as a home office, perfect for Zoom meetings and remote work. For the culinary enthusiast, the gourmet kitchen is a dream come true. Outfitted with gas cooktops, dual ovens, and multiple dishwashers, it offers versatility and convenience for any level of chef. A cozy breakfast nook completes the space, ideal for casual dining. The luxurious primary suite is a private retreat, featuring a romantic fireplace, built-in wet bar, and a spa-like bath with a soaking tub for two. A dedicated sauna and fitness area offer the perfect setup for your personal wellness routine—all within the comfort of your own home. Step outside to a beautifully landscaped backyard oasis, complete with a sparkling pool and spa, lots fruit trees around the property, perfect for entertaining and unwinding in total privacy. Centrally located between the 10 and 210 freeways, this home offers convenient access to top-rated schools, shopping, and all essential amenities. This is more than just a home—it’s a vacation resort style of living, and an opportunity not to be missed.