Hidden Hillside Estate, A Rare Valley Center Retreat. Set atop 19.44 acres of rolling hills with sweeping west-facing mountain views, Hidden Hillside Estate offers a rare opportunity to own a private retreat where breathtaking scenery, usable land, and endless possibilities come together. From vibrant sunrises to unforgettable sunset skies, this is a property designed to embrace the natural beauty of Valley Center from every angle. The estate is also enrolled in the Williamson Act (Land Conservation Act), resulting in significantly reduced property taxes and providing meaningful long-term ownership benefits. Additional APN: 128-122-17-00 (.71 acre/30,927 sqft.) included in the sale. Upon arrival, the home is immediately defined by its extraordinary setting, with panoramic mountain views surrounding you in nearly every direction. For those seeking the convenience of single-level living, the primary suite, kitchen, dining area, and main living spaces are all situated on one level. Each of these spaces is positioned to capture the stunning west-facing vistas, creating a seamless connection between indoor living and the surrounding landscape. The spacious primary retreat offers direct access to the view-filled living spaces and includes a generous walk-in closet and en-suite bath. Extending across the entire rear of the home, an expansive balcony provides the perfect setting for morning coffee, outdoor dining, entertaining guests, or simply taking in the ever-changing mountain and sunset views.