A rare and extraordinary offering—13.49 acres across two adjoining parcels at 5250 and 5360 Winfield Road, now available together for $3,750,000. This HISTORIC estate, known as Winfield Farm, features five separate residential structures, providing outstanding value and versatility. Residences include a main log farmhouse (5 bedrooms, 3.5 baths), a second home (3 bedrooms, 2.5 baths), a third carriage house (3 bedrooms, 1.5 baths), and two additional dwellings, including a fourth house on the adjacent 5-acre parcel. The property also includes a refurbished, air-conditioned two-level barn (currently used as office space), riding rings, horse stables, fenced pastures, gazebos, a stocked pond with fountain, carriage barn, chicken house, and smokehouse—all set within a mix of level open fields and mature wooded areas. No RPA encumbrances exist on the 5-acre parcel, offering a prime opportunity to build or expand. Fairfax County zoning allows for a wide range of uses, including Bed and Breakfast, Short-Term Lodging, Farm Winery, Brewery or Distillery, Religious Assembly, School, Group Living, Equestrian Facility, Cultural Center, and more. Existing lease through June 2026 adds potential income stream. Located just minutes from Fairfax County Parkway, Route 29, Route 66, and Dulles Airport, this property offers an unmatched blend of privacy, historic character, development flexibility, and convenience in a highly desirable Northern Virginia location.