Welcome to the historic 700 block of William Street, one of River Forest's most sought-after locations. From here, you'll enjoy easy access to Downtown Oak Park, Metra and the CTA Green Line, neighborhood grocery stores, and 2 National Blue Ribbon schools Lincoln Elementary School and Roosevelt Middle School. Set on a professionally designed and landscaped 50 x 178 lot, this beautifully updated Prairie-style home blends timeless architectural character with extensive, thoughtful renovations. Originally built in 1915 and lovingly owned since 2001, the home has been carefully renovated and expanded through several projects designed and overseen by Mark Zinni Architects. The home offers four bedrooms and 3.1 baths, including a spacious primary suite with a private en-suite bath. The main level features gracious living and dining rooms filled with natural light, a welcoming first-floor family room, and a private library/office with custom built-ins, ideal for working from home or enjoying a quiet retreat. With 3,264 square feet above grade, the home provides generous living space throughout. The finished basement adds exceptional versatility, offering a large recreation room, a home gym area, a craft and gift-wrapping center, and a full bath - perfect for everyday living, hobbies, and entertaining. Over the years, the home has benefited from extensive improvements, including a complete gut renovation with a three-level addition along with new electrical, plumbing, windows, and mechanical systems. The kitchen was thoughtfully expanded with a six-foot bump-out and features custom cabinetry, a large island, and updated appliances. Additional enhancements include a rebuilt garage, tear-off roof, interior drain tile system with sump pump, professional landscaping, and a custom paver patio that creates a lovely outdoor setting for gathering and relaxing. More recent updates include a custom kitchen pantry, new Bosch dishwasher, new beverage refrigerator, updated air-conditioning systems, and numerous ongoing improvements that reflect the attentive care and pride of long-term owners. A rare opportunity to own a beautifully maintained Prairie home that combines architectural integrity, modern functionality, and an exceptional central River Forest location. A full list of improvements and updates is available.