**First Time Ever on the Market!** Welcome to 8979 Alder Street, a rare opportunity to own a beautifully maintained custom-built home in one of Rancho Cucamonga's most desirable neighborhoods. Situated on an expansive **12,500 sq. ft. lot**, this one-of-a-kind property offers space, flexibility, breathtaking mountain views, and endless possibilities. Featuring **4 generously sized bedrooms**, **2.5 bathrooms**, and **two versatile flex rooms** perfect for a home office, gym, playroom, craft room, or guest space, this thoughtfully designed home offers room for every stage of life. The spacious family room opens to a private balcony where you can relax and enjoy the gorgeous views of the San Gabriel Mountains, creating the perfect setting for your morning coffee or evening sunsets. The oversized garage provides abundant space for vehicles, storage, and hobbies and includes **220-volt electrical service**. The impressive **24' x 24' detached workshop**, also equipped with **220-volt electrical service**, is accessible from both the backyard and Avila Avenue, offering exceptional flexibility for woodworking, hobbies, creative projects, additional storage, or a personal workshop. The expansive lot also features **RV parking** and plenty of room to add a pool, outdoor entertaining area, or create your dream backyard retreat. Recent upgrades include a **new roof**, **new luxury vinyl flooring**, **fresh exterior paint**, **new ductwork**, **new garage doors**, **dual-pane windows and sliding glass door**, and a **new water heater**, providing comfort, efficiency, and peace of mind.