Spectacular, unobstructed views from the nicest La Cima Plan 1X home on the market in the exclusive, guard-gated Summit--one of Irvine's finest communities and "Crown Jewel" of Turtle Ridge. Panoramic sunsets over city lights, mountains and the coast and on a private, single-loaded street on one of the highest elevations in this gated community. The 5,639 SF estate welcomes you with a grand entrance through a romantic breezeway and a courtyard and loggia with outdoor fireplace. Discover a detached Casita, a hotel suite-like guest quarters on the second floor with a kitchenette and a separate entrance; vaulted ceilings, open floor plan Great Room, opulent kitchen with large island, XL laundry room, 4 car garage, and a Main-Floor Master Suite-- an increasingly sought-after feature not always easy to find. The design allows a large family to stay together, yet have privacy and separate living spaces for everyone. Entertain in your large backyard with built-in BBQ, water feature, and plenty of space to customize a pool. Loaded with over $400,000 in upgrades to include a 10-camera security system, 78-point alarm system, whole-house audio system, Control 4 automated lighting, Solar Panels, Theater system, custom closets, hand-selected stone, designer wallpaper and window treatments. Magnificent community with resort-caliber amenities. Nearby UCI, a private school, and the best public schools incl. the #1 Ranked University High, Award-winning Vista Verde Elementary & Middle School.