Set on a premier southwest-facing homesite in The Oaks at Portola Hills, 5512 Heritage Oak Drive captures unobstructed panoramic views of rolling hills, city lights, and Southern California sunsets. The home offers approx. 4,896 sq ft with 5 bedrooms, 4.5 baths, and over $600,000 in custom upgrades. Designer furnishings, including a nearly new grand piano, are available separately by inventory. A covered porch opens to a two-story foyer with custom wall paneling, mirrored accents, arched openings, a curved staircase, and large-format Italian polished porcelain flooring throughout the main level, continuing outdoors in a matched matte finish. A main-level en-suite bedroom with walk-in closet offers flexible guest or office space. The formal dining room features illuminated custom cabinetry, while the great room showcases a coffered ceiling and stone-and-wood feature wall with illuminated niches and a linear fireplace with supplemental heat, plus a concealed 120-inch projection screen that retracts fully when not in use. The chef's kitchen offers floor-to-ceiling custom cabinetry, natural stone countertops, built-in refrigeration, double ovens, six-burner cooktop, oversized island seating five to six, butler's pantry, walk-in pantry, prep area. Expansive sliders open to the California Room with motorized shades, outdoor fireplace, dining and lounge areas, extending to a professionally landscaped backyard with private putting green and sweeping valley and city-light views. Upstairs, an open loft with custom workspace and illuminated shelving provides a versatile second living area. The primary suite captures panoramic views and features a sitting area, stone-appointed bath, illuminated walk-in closet, and covered private balcony overlooking the hills, city lights, and sunset horizon. Additional features include fully paid solar, a three-car garage, Puronics whole-house water softening and filtration, and no Mello-Roos. located near parks, trails, fitness clubs, Foothill Ranch shopping and dining, and the Orange County Great Park. Served by Saddleback Valley Unified School District, with nearby Portola Hills Elementary, rated 10/10, Serrano Intermediate, and Trabuco Hills High, a National Blue Ribbon School. Buyers to independently verify school assignments, ratings, eligibility, and property information. A rare combination of panoramic sunsets, extensive custom upgrades, indoor-outdoor living, and a premier Portola Hills setting.